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  1. Title: Massachusetts (Dams, 2012)

    • Point data
    • 2012
    Contributors:

    Summary: The ODS maintains a database that includes detailed information about each dam for operational purposes. Most of the location information was derived from historic data and has been ground-truthed against inspection and ownership reports that are maintained by the ODS. The locations of some dams have not been confirmed. These are pending verification and can be identified through the field 'LocStatus.’Dams regulated by the ODS in accordance with regulation CMR 302 10.00 are listed as ‘Office of Dam Safety’ in the field ‘RegAuth’.Please report any data errors or inconsistencies to the Office of Dam Safety (dam.safety@state.ma.us) or DCR-GIS (chandreyee.lahiri@state.ma.us)

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  2. Title: Mineral Resource Preservation Sites

    Contributors:

    Summary: Mineral Resource Preservation Sites created through parcel numbers provided by the California State Department of Conservation Division of Mines and Geology and Marin County Department of Public Works. Four local sites were added to State list.

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  3. Title: Map showing points of interest in Indiana

    Contributors:

    Summary: Panel title.; Includes index to points of interest.; Tourist information on verso. 63 x 40 centimeters on sheet 87 x 56 centimeters Scale approximately 1:800,000 General Map Collection

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  4. Title: Topography: Jackson Demonstration State Forest, California, 2002

    Contributors:

    Summary: This line shapefile represents the topography only for the Jackson Demonstration State Forest (JDSF), which is predominantly located on the coastal side of the Mendocino Range, the western-most range of the northern California Coast Ranges Geomorphic Province. The majority of the JDSF is mountainous, with elevations ranging from near sea level in the western portion of the JDSF to approximately 2175 feet in the eastern portion of the JDSF. The Coastal Terrane of the Coastal Belt of the Franciscan Complex forms the bedrock under most of JDSF. The geology and geologic history of JDSF directly influence the nature of the slopes and the types and rates of landslides present. The maps/data are useful in preparation of Timber Harvesting Plans, and for use by land managers for identifying areas of potentially unstable ground. The maps/data serve as a general guide to potential problem areas where more site-specific review is required. The scale of these maps limits the delineation of the various geologic and geomorphic features, and relative landslide potential categories. The information on these maps is not sufficient to serve as a substitute for geologic and geotechnical site investigations required under Chapters 7.5 and 7.8 of Division 2 of the California Public Resources Code. California Department of Conservation and California Geological Survey. (2001). Topography: Jackson Demonstration State Forest, California, 2002. California Dept. of Conservation and California Geological Survey. Available at http://purl.stanford.edu/rs780yh6312. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  5. Title: Landslide Areas: Jackson Demonstration State Forest, California, 2002

    Contributors:

    Summary: This polygon shapefile shows areas of landslide activity for the Jackson Demonstration State Forest (JDSF), which is predominantly located on the coastal side of the Mendocino Range, the western-most range of the northern California Coast Ranges Geomorphic Province. The majority of the JDSF is mountainous, with elevations ranging from near sea level in the western portion of the JDSF to approximately 2175 feet in the eastern portion of the JDSF. The Coastal Terrane of the Coastal Belt of the Franciscan Complex forms the bedrock under most of JDSF. The geology and geologic history of JDSF directly influence the nature of the slopes and the types and rates of landslides present. The maps/data are useful in preparation of Timber Harvesting Plans, and for use by land managers for identifying areas of potentially unstable ground. The maps/data serve as a general guide to potential problem areas where more site-specific review is required. The scale of these maps limits the delineation of the various geologic and geomorphic features, and relative landslide potential categories. The information on these maps is not sufficient to serve as a substitute for geologic and geotechnical site investigations required under Chapters 7.5 and 7.8 of Division 2 of the California Public Resources Code. California Department of Conservation and California Geological Survey. (2001). Landslide Areas: Jackson Demonstration State Forest, California, 2002. California Dept. of Conservation and California Geological Survey. Available at http://purl.stanford.edu/ny491ph4831. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  6. Title: Geologic Units (Points): Jackson Demonstration State Forest, California, 2002

    Contributors:

    Summary: This point shapefile geologic units such as marshes, wetlands, mines, quarries, and springs within the Jackson Demonstration State Forest (JDSF), which is predominantly located on the coastal side of the Mendocino Range, the western-most range of the northern California Coast Ranges Geomorphic Province. The majority of the JDSF is mountainous, with elevations ranging from near sea level in the western portion of the JDSF to approximately 2175 feet in the eastern portion of the JDSF. The Coastal Terrane of the Coastal Belt of the Franciscan Complex forms the bedrock under most of JDSF. The geology and geologic history of JDSF directly influence the nature of the slopes and the types and rates of landslides present. The maps/data are useful in preparation of Timber Harvesting Plans, and for use by land managers for identifying areas of potentially unstable ground. The maps/data serve as a general guide to potential problem areas where more site-specific review is required. The scale of these maps limits the delineation of the various geologic and geomorphic features, and relative landslide potential categories. The information on these maps is not sufficient to serve as a substitute for geologic and geotechnical site investigations required under Chapters 7.5 and 7.8 of Division 2 of the California Public Resources Code. California Department of Conservation and California Geological Survey. (2001). Geologic Units (Points): Jackson Demonstration State Forest, California, 2002. California Dept. of Conservation and California Geological Survey. Available at http://purl.stanford.edu/kp070sz5234. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  7. Title: Geologic Units (Lines): Jackson Demonstration State Forest, California, 2002

    Contributors:

    Summary: This line shapefile depicts geologic units, such as faults, for the Jackson Demonstration State Forest (JDSF), which is predominantly located on the coastal side of the Mendocino Range, the western-most range of the northern California Coast Ranges Geomorphic Province. The majority of the JDSF is mountainous, with elevations ranging from near sea level in the western portion of the JDSF to approximately 2175 feet in the eastern portion of the JDSF. The Coastal Terrane of the Coastal Belt of the Franciscan Complex forms the bedrock under most of JDSF. The geology and geologic history of JDSF directly influence the nature of the slopes and the types and rates of landslides present. The maps/data are useful in preparation of Timber Harvesting Plans, and for use by land managers for identifying areas of potentially unstable ground. The maps/data serve as a general guide to potential problem areas where more site-specific review is required. The scale of these maps limits the delineation of the various geologic and geomorphic features, and relative landslide potential categories. The information on these maps is not sufficient to serve as a substitute for geologic and geotechnical site investigations required under Chapters 7.5 and 7.8 of Division 2 of the California Public Resources Code. California Department of Conservation and California Geological Survey. (2001). Geologic Units (Lines): Jackson Demonstration State Forest, California, 2002. California Dept. of Conservation and California Geological Survey. Available at http://purl.stanford.edu/pz140kk9980. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  8. Title: Mapping Symbology: Jackson Demonstration State Forest, California, 2002

    Contributors:

    Summary: This line shapefile contains geologic mapping symbology, such as faults, landslides, scarps and direction of movement arrows, as well as prior landslide activity for the Jackson Demonstration State Forest (JDSF), which is predominantly located on the coastal side of the Mendocino Range, the western-most range of the northern California Coast Ranges Geomorphic Province. The majority of the JDSF is mountainous, with elevations ranging from near sea level in the western portion of the JDSF to approximately 2175 feet in the eastern portion of the JDSF. The Coastal Terrane of the Coastal Belt of the Franciscan Complex forms the bedrock under most of JDSF. The geology and geologic history of JDSF directly influence the nature of the slopes and the types and rates of landslides present. The maps/data are useful in preparation of Timber Harvesting Plans, and for use by land managers for identifying areas of potentially unstable ground. The maps/data serve as a general guide to potential problem areas where more site-specific review is required. The scale of these maps limits the delineation of the various geologic and geomorphic features, and relative landslide potential categories. The information on these maps is not sufficient to serve as a substitute for geologic and geotechnical site investigations required under Chapters 7.5 and 7.8 of Division 2 of the California Public Resources Code. California Department of Conservation and California Geological Survey. (2001). Mapping Symbology: Jackson Demonstration State Forest, California, 2002. California Dept. of Conservation and California Geological Survey. Available at http://purl.stanford.edu/tx785bh5231. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  9. Title: Landslides: Jackson Demonstration State Forest, California, 2002

    Contributors:

    Summary: This line shapefile contains landslide data for the Jackson Demonstration State Forest (JDSF), predominantly located on the coastal side of the Mendocino Range, the western-most range of the northern California Coast Ranges Geomorphic Province. The majority of the JDSF is mountainous, with elevations ranging from near sea level in the western portion of the JDSF to approximately 2175 feet in the eastern portion of the JDSF. The Coastal Terrane of the Coastal Belt of the Franciscan Complex forms the bedrock under most of JDSF. The geology and geologic history of JDSF directly influence the nature of the slopes and the types and rates of landslides present. The maps/data are useful in preparation of Timber Harvesting Plans, and for use by land managers for identifying areas of potentially unstable ground. The maps/data serve as a general guide to potential problem areas where more site-specific review is required. The scale of these maps limits the delineation of the various geologic and geomorphic features, and relative landslide potential categories. The information on these maps is not sufficient to serve as a substitute for geologic and geotechnical site investigations required under Chapters 7.5 and 7.8 of Division 2 of the California Public Resources Code. California Department of Conservation and California Geological Survey. (2001). Landslides: Jackson Demonstration State Forest, California, 2002. California Dept. of Conservation and California Geological Survey. Available at http://purl.stanford.edu/xn481vm2907. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  10. Title: Jackson Demostration State Forest, California, 2002

    Contributors:

    Summary: This polygon shapefile displays the boundaries of the Jackson Demonstration State Forest (JDSF), predominantly located on the coastal side of the Mendocino Range, the western-most range of the northern California Coast Ranges Geomorphic Province. The majority of the JDSF is mountainous, with elevations ranging from near sea level in the western portion of the JDSF to approximately 2175 feet in the eastern portion of the JDSF. The Coastal Terrane of the Coastal Belt of the Franciscan Complex forms the bedrock under most of JDSF. The geology and geologic history of JDSF directly influence the nature of the slopes and the types and rates of landslides present. The maps/data are useful in preparation of Timber Harvesting Plans, and for use by land managers for identifying areas of potentially unstable ground. The maps/data serve as a general guide to potential problem areas where more site-specific review is required. The scale of these maps limits the delineation of the various geologic and geomorphic features, and relative landslide potential categories. The information on these maps is not sufficient to serve as a substitute for geologic and geotechnical site investigations required under Chapters 7.5 and 7.8 of Division 2 of the California Public Resources Code. California Department of Conservation and California Geological Survey. (2001). Jackson Demostration State Forest, California, 2002. California Dept. of Conservation and California Geological Survey. Available at http://purl.stanford.edu/dv129yj1591. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  11. Title: Landslide Points: Jackson Demonstration State Forest, California, 2002

    Contributors:

    Summary: This point shapefile contains landslide data for the Jackson Demonstration State Forest (JDSF), which is predominantly located on the coastal side of the Mendocino Range, the western-most range of the northern California Coast Ranges Geomorphic Province. The majority of the JDSF is mountainous, with elevations ranging from near sea level in the western portion of the JDSF to approximately 2175 feet in the eastern portion of the JDSF. The Coastal Terrane of the Coastal Belt of the Franciscan Complex forms the bedrock under most of JDSF. The geology and geologic history of JDSF directly influence the nature of the slopes and the types and rates of landslides present. The maps/data are useful in preparation of Timber Harvesting Plans, and for use by land managers for identifying areas of potentially unstable ground. The maps/data serve as a general guide to potential problem areas where more site-specific review is required. The scale of these maps limits the delineation of the various geologic and geomorphic features, and relative landslide potential categories. The information on these maps is not sufficient to serve as a substitute for geologic and geotechnical site investigations required under Chapters 7.5 and 7.8 of Division 2 of the California Public Resources Code. California Department of Conservation and California Geological Survey. (2001). Landslide Points: Jackson Demonstration State Forest, California, 2002. California Dept. of Conservation and California Geological Survey. Available at http://purl.stanford.edu/by036cv7971. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  12. Title: Geologic Units: Jackson Demonstration State Forest, California, 2002

    Contributors:

    Summary: This polygon shapefile depicts geologic units as areas, such as lithologic contact, fault contact, and watershed boundaries for the Jackson Demonstration State Forest (JDSF), which is predominantly located on the coastal side of the Mendocino Range, the western-most range of the northern California Coast Ranges Geomorphic Province. The majority of the JDSF is mountainous, with elevations ranging from near sea level in the western portion of the JDSF to approximately 2175 feet in the eastern portion of the JDSF. The Coastal Terrane of the Coastal Belt of the Franciscan Complex forms the bedrock under most of JDSF. The geology and geologic history of JDSF directly influence the nature of the slopes and the types and rates of landslides present. The maps/data are useful in preparation of Timber Harvesting Plans, and for use by land managers for identifying areas of potentially unstable ground. The maps/data serve as a general guide to potential problem areas where more site-specific review is required. The scale of these maps limits the delineation of the various geologic and geomorphic features, and relative landslide potential categories. The information on these maps is not sufficient to serve as a substitute for geologic and geotechnical site investigations required under Chapters 7.5 and 7.8 of Division 2 of the California Public Resources Code. California Department of Conservation and California Geological Survey. (2001). Geologic Units: Jackson Demonstration State Forest, California, 2002. California Dept. of Conservation and California Geological Survey. Available at http://purl.stanford.edu/zg154pd4168. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  13. Title: Relative Landslide Potential: Jackson Demonstration State Forest, California, 2002

    Contributors:

    Summary: This polygon file depicts relative landslide potential for the Jackson Demonstration State Forest (JDSF), which is predominantly located on the coastal side of the Mendocino Range, the western-most range of the northern California Coast Ranges Geomorphic Province. The majority of the JDSF is mountainous, with elevations ranging from near sea level in the western portion of the JDSF to approximately 2175 feet in the eastern portion of the JDSF. The Coastal Terrane of the Coastal Belt of the Franciscan Complex forms the bedrock under most of JDSF. The geology and geologic history of JDSF directly influence the nature of the slopes and the types and rates of landslides present. The maps/data are useful in preparation of Timber Harvesting Plans, and for use by land managers for identifying areas of potentially unstable ground. The maps/data serve as a general guide to potential problem areas where more site-specific review is required. The scale of these maps limits the delineation of the various geologic and geomorphic features, and relative landslide potential categories. The information on these maps is not sufficient to serve as a substitute for geologic and geotechnical site investigations required under Chapters 7.5 and 7.8 of Division 2 of the California Public Resources Code. California Department of Conservation and California Geological Survey. (2001). Relative Landslide Potential: Jackson Demonstration State Forest, California, 2002. California Dept. of Conservation and California Geological Survey. Available at http://purl.stanford.edu/gt026dp7169. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  14. Title: Geologic Structures, Elk River Watershed, California, 1940-2000

    Contributors:

    Summary: This point shapefile represents geologic structures, such as quarries and bedding, within the Elk River watershed in Humboldt County, California. This dataset is the product of the Department of Conservation, California Geological Survey’s (CGS) investigation of landslides in the Elk River watershed. The 52 square mile study area is located in Humboldt County in northwestern California. The investigation was based on interpretation of 1940, 1941, 1948, 1954, 1962, 1965, 1984, 1988, 1996 and 2000 aerial photos, findings from CGS’s landslide mapping conducted in the early 1980s (Kilbourne, R.T. 1982-84, Manson, M. W. 1984), as well as other sources. Mapping was conducted at 1:24,000 scale. The resulting maps are titled “Geologic and Geomorphic Features Related to Landsliding, Elk River Watershed” (Plate 1) and “Relative Landslide Potential with Geologic and Geomorphic Features, Elk River Watershed” map (Plate 2). This study was conducted at a regional scale of mapping using ten sets of aerial photos combined with a compilation of earlier published and unpublished work. Other photo sets may reveal additional landslides. The regional nature of the study makes the data and maps, including the relative landslide potential zones, inappropriate as a substitute for site-specific analysis. CGS evaluated the geology, relative slope stability and geomorphic characteristics within the watershed, and compiled the digital geospatial data described in this document. This mapping and compilation is geared toward providing baseline geologic and geomorphic data to aid in responsible land management, as well as the development of watershed restoration projects, watershed management strategies, and watershed plans. Initial checking of attributes was conducted by the geologists who mapped the features. Limited field assessment of attributes was completed. The 'confidence' attribute indicates the geologist's level of certainty in a given feature (typically as viewed through a stereoscope). Peer reviewers and GIS staff conducted additional quality control. Because the attribute fields are designed to address various types of mapping products, and because some data is compiled from other sources, not all attribute fields are populated. Marshall, G., Mendes, E., California Geological Survey and California Dept. of Conservation. (2005). Geologic Structures, Elk River Watershed, California, 1940-2000 California Geological Survey. Available at: http://purl.stanford.edu/gk783mb5094. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  15. Title: Relative Landslide Potential Regions, Elk River Watershed, California, 1940-2000

    Contributors:

    Summary: This polygon shapefile depicts regions of relative landslide potential within the Elk River watershed in Humboldt County, California. This layer contains five categories used to indicate potential for landsliding. This dataset is the product of the Department of Conservation, California Geological Survey’s (CGS) investigation of landslides in the Elk River watershed. The 52 square mile study area is located in Humboldt County in northwestern California. The investigation was based on interpretation of 1940, 1941, 1948, 1954, 1962, 1965, 1984, 1988, 1996 and 2000 aerial photos, findings from CGS’s landslide mapping conducted in the early 1980s (Kilbourne, R.T. 1982-84, Manson, M. W. 1984), as well as other sources. Mapping was conducted at 1:24,000 scale. The resulting maps are titled “Geologic and Geomorphic Features Related to Landsliding, Elk River Watershed” (Plate 1) and “Relative Landslide Potential with Geologic and Geomorphic Features, Elk River Watershed” map (Plate 2). This study was conducted at a regional scale of mapping using ten sets of aerial photos combined with a compilation of earlier published and unpublished work. Other photo sets may reveal additional landslides. The regional nature of the study makes the data and maps, including the relative landslide potential zones, inappropriate as a substitute for site-specific analysis. CGS evaluated the geology, relative slope stability and geomorphic characteristics within the watershed, and compiled the digital geospatial data described in this document. This mapping and compilation is geared toward providing baseline geologic and geomorphic data to aid in responsible land management, as well as the development of watershed restoration projects, watershed management strategies, and watershed plans. Initial checking of attributes was conducted by the geologists who mapped the features. Limited field assessment of attributes was completed. The 'confidence' attribute indicates the geologist's level of certainty in a given feature (typically as viewed through a stereoscope). Peer reviewers and GIS staff conducted additional quality control. Because the attribute fields are designed to address various types of mapping products, and because some data is compiled from other sources, not all attribute fields are populated. Marshall, G., Mendes, E., California Geological Survey and California Dept. of Conservation. (2005). Relative Landslide Potential Regions, Elk River Watershed, California, 1940-2000 California Geological Survey. Available at: http://purl.stanford.edu/jw451fc8243. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  16. Title: Narrow Landslide Features, Elk River Watershed, California, 1940-2000

    Contributors:

    Summary: This line shapefile depicts narrow landslide features within the Elk River watershed in Humboldt County, California. These landslides often occur as torrent tracts downstream of a debris slide source. All features in this layer are considered to be historically active. (Estimated to have moved within the last 150 years). This layer does not include narrow features that are less than 150 feet in length. This dataset is the product of the Department of Conservation, California Geological Survey’s (CGS) investigation of landslides in the Elk River watershed. The 52 square mile study area is located in Humboldt County in northwestern California. The investigation was based on interpretation of 1940, 1941, 1948, 1954, 1962, 1965, 1984, 1988, 1996 and 2000 aerial photos, findings from CGS’s landslide mapping conducted in the early 1980s (Kilbourne, R.T. 1982-84, Manson, M. W. 1984), as well as other sources. Mapping was conducted at 1:24,000 scale. The resulting maps are titled “Geologic and Geomorphic Features Related to Landsliding, Elk River Watershed” (Plate 1) and “Relative Landslide Potential with Geologic and Geomorphic Features, Elk River Watershed” map (Plate 2). This study was conducted at a regional scale of mapping using ten sets of aerial photos combined with a compilation of earlier published and unpublished work. Other photo sets may reveal additional landslides. The regional nature of the study makes the data and maps, including the relative landslide potential zones, inappropriate as a substitute for site-specific analysis. CGS evaluated the geology, relative slope stability and geomorphic characteristics within the watershed, and compiled the digital geospatial data described in this document. This mapping and compilation is geared toward providing baseline geologic and geomorphic data to aid in responsible land management, as well as the development of watershed restoration projects, watershed management strategies, and watershed plans. Initial checking of attributes was conducted by the geologists who mapped the features. Limited field assessment of attributes was completed. The 'confidence' attribute indicates the geologist's level of certainty in a given feature (typically as viewed through a stereoscope). Peer reviewers and GIS staff conducted additional quality control. Because the attribute fields are designed to address various types of mapping products, and because some data is compiled from other sources, not all attribute fields are populated. Marshall, G., Mendes, E., California Geological Survey and California Dept. of Conservation. (2005). Narrow Landslide Features, Elk River Watershed, California, 1940-2000 California Geological Survey. Available at: http://purl.stanford.edu/wt302vp4118. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  17. Title: Landslide Symbology, Elk River Watershed, California, 1940-2000

    Contributors:

    Summary: This line shapefile contains symbology used to graphically depict active/dormant landslide features such as earthflow, headwalls, bases of scarps, and the direction of movement of landslides, within the Elk River watershed in Humboldt County, California. This dataset is the product of the Department of Conservation, California Geological Survey’s (CGS) investigation of landslides in the Elk River watershed. The 52 square mile study area is located in Humboldt County in northwestern California. The investigation was based on interpretation of 1940, 1941, 1948, 1954, 1962, 1965, 1984, 1988, 1996 and 2000 aerial photos, findings from CGS’s landslide mapping conducted in the early 1980s (Kilbourne, R.T. 1982-84, Manson, M. W. 1984), as well as other sources. Mapping was conducted at 1:24,000 scale. The resulting maps are titled “Geologic and Geomorphic Features Related to Landsliding, Elk River Watershed” (Plate 1) and “Relative Landslide Potential with Geologic and Geomorphic Features, Elk River Watershed” map (Plate 2). This study was conducted at a regional scale of mapping using ten sets of aerial photos combined with a compilation of earlier published and unpublished work. Other photo sets may reveal additional landslides. The regional nature of the study makes the data and maps, including the relative landslide potential zones, inappropriate as a substitute for site-specific analysis. CGS evaluated the geology, relative slope stability and geomorphic characteristics within the watershed, and compiled the digital geospatial data described in this document. This mapping and compilation is geared toward providing baseline geologic and geomorphic data to aid in responsible land management, as well as the development of watershed restoration projects, watershed management strategies, and watershed plans. Initial checking of attributes was conducted by the geologists who mapped the features. Limited field assessment of attributes was completed. The 'confidence' attribute indicates the geologist's level of certainty in a given feature (typically as viewed through a stereoscope). Peer reviewers and GIS staff conducted additional quality control. Because the attribute fields are designed to address various types of mapping products, and because some data is compiled from other sources, not all attribute fields are populated. Marshall, G., Mendes, E., California Geological Survey and California Dept. of Conservation. (2005). Landslide Symbology, Elk River Watershed, California, 1940-2000 California Geological Survey. Available at: http://purl.stanford.edu/zw511ck2079. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  18. Title: Topographic Contours, Elk River Watershed, California, 1940-2000

    Contributors:

    Summary: This line shapefile depicts contains topographic contours of the Elk River watershed in Humboldt County, California. These countours were derived from a 7.5 minute topographic quadrangle map originally produced by the US Geological Survey. This dataset is the product of the Department of Conservation, California Geological Survey’s (CGS) investigation of landslides in the Elk River watershed. The 52 square mile study area is located in Humboldt County in northwestern California. The investigation was based on interpretation of 1940, 1941, 1948, 1954, 1962, 1965, 1984, 1988, 1996 and 2000 aerial photos, findings from CGS’s landslide mapping conducted in the early 1980s (Kilbourne, R.T. 1982-84, Manson, M. W. 1984), as well as other sources. Mapping was conducted at 1:24,000 scale. The resulting maps are titled “Geologic and Geomorphic Features Related to Landsliding, Elk River Watershed” (Plate 1) and “Relative Landslide Potential with Geologic and Geomorphic Features, Elk River Watershed” map (Plate 2). This study was conducted at a regional scale of mapping using ten sets of aerial photos combined with a compilation of earlier published and unpublished work. Other photo sets may reveal additional landslides. The regional nature of the study makes the data and maps, including the relative landslide potential zones, inappropriate as a substitute for site-specific analysis. CGS evaluated the geology, relative slope stability and geomorphic characteristics within the watershed, and compiled the digital geospatial data described in this document. This mapping and compilation is geared toward providing baseline geologic and geomorphic data to aid in responsible land management, as well as the development of watershed restoration projects, watershed management strategies, and watershed plans. Initial checking of attributes was conducted by the geologists who mapped the features. Limited field assessment of attributes was completed. The 'confidence' attribute indicates the geologist's level of certainty in a given feature (typically as viewed through a stereoscope). Peer reviewers and GIS staff conducted additional quality control. Because the attribute fields are designed to address various types of mapping products, and because some data is compiled from other sources, not all attribute fields are populated. Marshall, G., Mendes, E., California Geological Survey and California Dept. of Conservation. (2005). Topographic Contours, Elk River Watershed, California, 1940-2000 California Geological Survey. Available at: http://purl.stanford.edu/vv491fg9036. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  19. Title: Active and Dormant Landslides (Small), Elk River Watershed, California, 1940-2000

    Contributors:

    Summary: This point shapefile depicts smaller active and dormant landslides within the Elk River watershed in Humboldt County, California. Features shown here represent landslides too small to delineate at 1:24,000 scale (typically less than 1/5 acre in area or less than 150 feet in length). These features are considered historically active (estimated to have moved within approxiamtely the past 150 years). This dataset is the product of the Department of Conservation, California Geological Survey’s (CGS) investigation of landslides in the Elk River watershed. The 52 square mile study area is located in Humboldt County in northwestern California. The investigation was based on interpretation of 1940, 1941, 1948, 1954, 1962, 1965, 1984, 1988, 1996 and 2000 aerial photos, findings from CGS’s landslide mapping conducted in the early 1980s (Kilbourne, R.T. 1982-84, Manson, M. W. 1984), as well as other sources. Mapping was conducted at 1:24,000 scale. The resulting maps are titled “Geologic and Geomorphic Features Related to Landsliding, Elk River Watershed” (Plate 1) and “Relative Landslide Potential with Geologic and Geomorphic Features, Elk River Watershed” map (Plate 2). This study was conducted at a regional scale of mapping using ten sets of aerial photos combined with a compilation of earlier published and unpublished work. Other photo sets may reveal additional landslides. The regional nature of the study makes the data and maps, including the relative landslide potential zones, inappropriate as a substitute for site-specific analysis. CGS evaluated the geology, relative slope stability and geomorphic characteristics within the watershed, and compiled the digital geospatial data described in this document. This mapping and compilation is geared toward providing baseline geologic and geomorphic data to aid in responsible land management, as well as the development of watershed restoration projects, watershed management strategies, and watershed plans. Initial checking of attributes was conducted by the geologists who mapped the features. Limited field assessment of attributes was completed. The 'confidence' attribute indicates the geologist's level of certainty in a given feature (typically as viewed through a stereoscope). Peer reviewers and GIS staff conducted additional quality control. Because the attribute fields are designed to address various types of mapping products, and because some data is compiled from other sources, not all attribute fields are populated. Marshall, G., Mendes, E., California Geological Survey and California Dept. of Conservation. (2005). Active and Dormant Landslides (Small), Elk River Watershed, California, 1940-2000 California Geological Survey. Available at: http://purl.stanford.edu/cg523fv1736. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  20. Title: Waterbodies, Elk River Watershed, California, 1940-2000

    Contributors:

    Summary: This line shapefile depicts bodies of water, such as rivers, streams, creeks, channels, and sloughs, within the Elk River watershed in Humboldt County, California. This dataset is the product of the Department of Conservation, California Geological Survey’s (CGS) investigation of landslides in the Elk River watershed. The 52 square mile study area is located in Humboldt County in northwestern California. The investigation was based on interpretation of 1940, 1941, 1948, 1954, 1962, 1965, 1984, 1988, 1996 and 2000 aerial photos, findings from CGS’s landslide mapping conducted in the early 1980s (Kilbourne, R.T. 1982-84, Manson, M. W. 1984), as well as other sources. Mapping was conducted at 1:24,000 scale. The resulting maps are titled “Geologic and Geomorphic Features Related to Landsliding, Elk River Watershed” (Plate 1) and “Relative Landslide Potential with Geologic and Geomorphic Features, Elk River Watershed” map (Plate 2). This study was conducted at a regional scale of mapping using ten sets of aerial photos combined with a compilation of earlier published and unpublished work. Other photo sets may reveal additional landslides. The regional nature of the study makes the data and maps, including the relative landslide potential zones, inappropriate as a substitute for site-specific analysis. CGS evaluated the geology, relative slope stability and geomorphic characteristics within the watershed, and compiled the digital geospatial data described in this document. This mapping and compilation is geared toward providing baseline geologic and geomorphic data to aid in responsible land management, as well as the development of watershed restoration projects, watershed management strategies, and watershed plans. Initial checking of attributes was conducted by the geologists who mapped the features. Limited field assessment of attributes was completed. The 'confidence' attribute indicates the geologist's level of certainty in a given feature (typically as viewed through a stereoscope). Peer reviewers and GIS staff conducted additional quality control. Because the attribute fields are designed to address various types of mapping products, and because some data is compiled from other sources, not all attribute fields are populated. Marshall, G., Mendes, E., California Geological Survey and California Dept. of Conservation. (2005). Waterbodies, Elk River Watershed, California, 1940-2000 California Geological Survey. Available at: http://purl.stanford.edu/rk814ny3605. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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