10,000+ results returned
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Title: Butte County, California land parcels, 2009
Contributors:- Polygon data
- 2009
Summary: The parcel feature class is a polygon feature class representing the individual parcels for Butte County, California, 2009, which was derived from assessor map pages in digital and hardcopy formats. All new parcels are entered from assessor CAD pages registered to orthorectified imagery.
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Title: Fire Districts, Sacramento County, California, 2010
Contributors:- Polygon data
- 2010
Summary: Fire Agency districts in Sacramento County
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Title: Airports, Sacramento County, California, 2008
Contributors:- Polygon data
- 2008
Summary: Airports in SACOG Region, digitized from USGS topo maps and corrected as necessary with TIGER data & county parcel coverages.
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Title: Cemetery Districts, Sacramento, California, 2007
Contributors:- Polygon data
- 2007
Summary: This shapefile contains cemetary districts within the city of Sacramento, California.
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Title: Congressional Districts, Sacramento County, California, 2007
Contributors:- Polygon data
- 2007
Summary: This map shows congressional districts in Sacramento County.
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Title: ABAG Priority Development Areas, San Mateo County Sea Level Rise Vulnerability Assessment Project Area, 2016
Contributors:- Polygon data
- 2019
Summary: This polygon shpefile contains the Priority Development Areas (PDA) used by the Association of Bay Area Governments (ABAG) to plan for development in the San Francisco Bay Region. PDAs represent areas local jurisdictions have identified, as part of ABAG's Sustainable Communities Strategy work, for new and/or intensified development. This PDA feature set is limited to use in general mapping and analysis related to the San Francisco Bay Region. Association of Bay Area Governments, February 2016. DO NOT USE this feature set for mapping and analysis related to Plan Bay Area. Plan Bay Area specific PDAs are available in a separate feature set. The data are current as of February 2016. This layer is part of the San Mateo County Sea Level Rise Vulnerability Assessment Project. These data are intended for researchers, students, and policy makers for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production. County of San Mateo Information Services Department and Association of Bay Area Governments. (2019). ABAG Priority Development Areas, San Mateo County Sea Level Rise Vulnerability Assessment Project Area, 2016. County of San Mateo Information Services Department. Available at: http://purl.stanford.edu/sj061ht5116. 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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Title: Major Roads: San Francisco Bay Area, California, 2011
Contributors:- Line data
- 2011
Summary: This data comes from a variety of sources developed over the years including ESRI data, Department of Transportation, TIGER and counties. It is not meant to be precisely accurate and represents most of the major roads in California. This was developed by the CLN and GreenInfo Network. Primarily used for cartography. This dataset was developed/compiled for use in the San Francisco Bay Area Upland Habitat Goals Project and contributed to the developement of the Conservation Lands Network. Bay Area Open Space Council, GreenInfo Network, Conservation Lands Network, and San Francisco Bay Area Upland Habitat Goals Project. (2011). Major Roads: San Francisco Bay Area, California, 2011. Bay Area Open Space Council. Available at http://purl.stanford.edu/dv532tj4273. 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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Title: The Conservation Lands Network regional biodiversity GIS database
Contributors:- Not specified
- 2011
Summary: by Bay Area Open Space Council Between 2006 and 2011, the Bay Area Open Space Council partnered with 125 regional experts to develop the Conservation Lands Network as a tool for conservation practitioners, landowners, land managers, policy makers and the public. This collection contains vector and raster data related to biodiversity and environmental conservation within the San Francisco Bay Area.
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Title: Shaded Surface Relief: California, 150-Meter Resolution
Contributors:- Raster data
- 2011
Summary: This raster dataset depicts a 150 meter resolution shaded surface relief of California. This hillshade was generated by GreenInfo Network and was created from a 150m USGS DEM using the hillshade feature in spatial analyst. This dataset was developed/compiled for use in the San Francisco Bay Area Upland Habitat Goals Project and contributed to the developement of the Conservation Lands Network. Primarily used as a base layer for cartography. Bay Area Open Space Council, GreenInfo Network, Conservation Lands Network, and San Francisco Bay Area Upland Habitat Goals Project. (2011). Shaded Surface Relief: California, 150-Meter Resolution. Bay Area Open Space Council. Available at http://purl.stanford.edu/kv016qw0526. None, GNU General Public License (GPL), put in the url. in cased used incorrectly, make $ off it, limit liability. for use constraints 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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Title: California Urban Lands: Farmland Mapping and Monitoring Project, 2006
Contributors:- Polygon data
- 2011
Summary: This polygon shapefile depicts urban land coverage for the nine county San Francisco Bay Area Region for 2004-2006. The data comes directly from the Farmland Mapping and Monitoring Program (FMMP), which provides data to decision makers for assessing present status, reviewing trends and planning for the future of California's agricultural land resources. FMMP mapping coverage includes 49.1 million acres, 98% of the state's private lands and is based on the extent of the United States Department of Agriculture Natural Resources Conservation Service soil surveys. Most large government land holdings, including National Parks, Forests, and Bureau of Land Management land, are not included in the FMMP survey area. This layer is part of the Conservation Lands Network regional biodiversity GIS database. This dataset was developed/compiled for use in the San Francisco Bay Area Upland Habitat Goals Project and contributed to the developement of the Conservation Lands Network. Used for cartographic purposes, this layer can show urban land use in nine county San Francisco Bay Area Region. This is helpful for setting context, as most people recognize urban areas and cities. For example, knowing where Sacramento is located helps when showing a broad regional map. Bay Area Open Space Council, GreenInfo Network, Conservation Lands Network, and San Francisco Bay Area Upland Habitat Goals Project. (2011). California Urban Lands: Farmland Mapping and Monitoring Project, 2006. Bay Area Open Space Council. Available at http://purl.stanford.edu/kh450fm7856. 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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Title: Land Use Plan, District of Columbia, 1996 (Raster Image)
Contributors:- Raster data
- 2013
Summary: This layer is a georeferenced raster image of the historic paper map entitled: Composite map of adopted land use plans. It was published by the Metropollitan Washington Council of Governments in 1996. Scale 1:192,000. 1 in. = 3 miles. The image inside the map neatline is georeferenced to the surface of the earth and fit to the North American Datum 1983, Universal Transverse Mercator (UTM) Zone 18N projected coordinate system. All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, index maps, legends, or other information associated with the principal map. This map shows features such as drainage, cities and other human settlements, territorial boundaries, shoreline features, and more. This layer is part of a selection of digitally scanned and georeferenced historic maps from the Harvard Map Collection. These maps typically portray both natural and manmade features. The selection represents a range of originators, ground condition dates, scales, and map purposes.
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Title: Population Density in Watersheds: San Francisco Bay Area, California, 2009
Contributors:- Polygon data
- 2011
- Bay Area Open Space Council
- Conservation Lands Network
- San Francisco Bay Area Upland Habitat Goals Project
- GreenInfo Network (Firm)
Summary: This polygon shapefile depicts a watershed integrity cluster analysis at the CalWater 2.2.1 Planning Watershed (PWS) level performed by mapping factors representing some of the most significant watershed threats. Each of the individual watershed integrity factors was individually mapped and then combined in the watershed cluster analysis. This individual threat, cultivated, was created by taking CalWater watersheds at the planning unit level (most refined) and running zonal stats, part of spatial analyst. The Calwater PWS watershed was the zone dataset (pwsname as the zone field) and Population Density as the value raster. The result gives you the mean percent population density of the nine county San Francisco Bay Area Region, California at the watershed level in a table that you can join back to the CalWater GIS layer and then symbolize as a graduated color with the mean being the value field. This analysis was done by the Conservation Lands Network Fish and Riparian Focus Team. This dataset was developed/compiled for use in the San Francisco Bay Area Upland Habitat Goals Project, a Project used to identify a Conservation Lands Network (CLN) for biodiversity preservation to inform conservation investments and lasting cooperative conservation partnerships. The Conservation Lands Network GIS Database is the primary output of the Project. The data depicts the spatially explicit CLN that is recommended for the nine county San Francisco Bay Area Region, California. Bay Area Open Space Council, GreenInfo Network, Conservation Lands Network, and San Francisco Bay Area Upland Habitat Goals Project. (2011). Population Density in Watersheds: San Francisco Bay Area, California, 2009. Bay Area Open Space Council. Available at http://purl.stanford.edu/wc460zb2749. 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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Title: Protected Areas in Watersheds: San Francisco Bay Area, California, 2009
Contributors:- Polygon data
- 2011
- Bay Area Open Space Council
- Conservation Lands Network
- San Francisco Bay Area Upland Habitat Goals Project
- GreenInfo Network (Firm)
Summary: This polygon shapefile depicts a watershed integrity cluster analysis at the CalWater 2.2.1 Planning Watershed (PWS) level performed by mapping factors representing some of the most significant watershed threats. Each of the individual watershed integrity factors was individually mapped and then combined in the watershed cluster analysis. This individual threat, cultivated, was created by taking calwater watersheds at the planning unit level (most refined) and running zonal stats, part of spatial analyst. The Bay Area Open Space Council Bay Area Protected Areas Database (BPAD) protected areas data was converted to a grid so that zonal stats could be used. The CalWater PWS watershed was the zone dataset (pwsname as the zone field) and BPAD Protected as the value raster. The result gives you the mean percent protected in the nine county San Francisco Bay Area Region, California at the watershed level in a table that you can join back to the CalWater GIS layer and then symbolize as a graduated color with the mean being the value field. This analysis was done by the Conservation Lands Network Fish and Riparian Focus Team. This dataset was developed/compiled for use in the San Francisco Bay Area Upland Habitat Goals Project, a Project used to identify a Conservation Lands Network (CLN) for biodiversity preservation to inform conservation investments and lasting cooperative conservation partnerships. The Conservation Lands Network GIS Database is the primary output of the Project. The data depicts the spatially explicit CLN that is recommended for the nine county San Francisco Bay Area Region, California. Bay Area Open Space Council, GreenInfo Network, Conservation Lands Network, and San Francisco Bay Area Upland Habitat Goals Project. (2011). Protected Areas in Watersheds: San Francisco Bay Area, California, 2009. Bay Area Open Space Council. Available at http://purl.stanford.edu/wh281bw1148. 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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Title: Fire Rotation: San Francisco Bay Area, California, 2004
Contributors:- Raster data
- 2011
- Bay Area Open Space Council
- Conservation Lands Network
- San Francisco Bay Area Upland Habitat Goals Project
- GreenInfo Network (Firm)
Summary: This raster dataset depicts fire rotation class intervals calculated from 1950-2003 fire history on land areas grouped into strata based on fire environment conditions for the nine county San Francisco Bay Area Region, California. These strata are defined by vegetation, climate, direct protection agency and elevation. The fire rotation interval is the expected number of years it would take, based on past fire rates, to burn an area equivalent to that of a given stratum. Fire rotation interval for a given stratum is calculated by dividing the mean annual number of acres burned into the total area of the stratum. Finally, fire rotation values are grouped into classes. The larger fire rotation values correspond to less frequent burning. In contrast the higher the rotation class value is, the more frequent fire is in that stratum. The source data was compiled by the California Department of Forestry and Fire Protection and the United States Department of Agriculture Forest Service. This dataset was developed/compiled for use in the San Francisco Bay Area Upland Habitat Goals Project, a Project used to identify a Conservation Lands Network (CLN) for biodiversity preservation to inform conservation investments and lasting cooperative conservation partnerships. The Conservation Lands Network GIS Database is the primary output of the Project. The data depicts the spatially explicit CLN that is recommended for the nine county San Francisco Bay Area Region, California. Bay Area Open Space Council, GreenInfo Network, Conservation Lands Network, and San Francisco Bay Area Upland Habitat Goals Project. (2011). Fire Rotation: San Francisco Bay Area, California, 2004. Bay Area Open Space Council. Available at: http://purl.stanford.edu/tw527tc9048 Source metadata and data available at: http://frap.fire.ca.gov/data/frapgisdata-subset.php 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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Title: Shrew Mole Range (Reverse Polygon Mask): San Francisco Bay Area, California, 2008
Contributors:- Polygon data
- 2011
- Bay Area Open Space Council
- Conservation Lands Network
- San Francisco Bay Area Upland Habitat Goals Project
- GreenInfo Network (Firm)
Summary: This polygon shapefile depicts the range map the American shrew mole (Neurotrichus gibbsii) that were pulled out and then reversed so the polygon represents areas outside of their range. This creates a mask so the actual species ranges can be shown while the area outside of its range can be masked out. Vector datasets are a component of the California Wildlife Habitat Relationships (CWHR) range maps, a comprehensive information system and predictive model for California's wildlife. The CWHR System was developed to support habitat conservation and management, land use planning, impact assessment, education and research involving terrestrial vertebrates in California. CWHR contains information on life history, management status, geographic distribution and habitat relationships for 694 species of amphibians, reptiles, birds and mammals known to occur regularly in the state. Range maps represent the maximum, current geographic extent of each species within California. They were originally delineated at a scale of 1:5,000,000 by species-level experts and have gradually been revised at a scale of 1:1,000,000. This dataset was developed/compiled for use in the San Francisco Bay Area Upland Habitat Goals Project, a Project used to identify a Conservation Lands Network (CLN) for biodiversity preservation to inform conservation investments and lasting cooperative conservation partnerships. The Conservation Lands Network GIS Database is the primary output of the Project. The data depicts the spatially explicit CLN that is recommended for the nine county San Francisco Bay Area Region, California. Bay Area Open Space Council, GreenInfo Network, Conservation Lands Network, and San Francisco Bay Area Upland Habitat Goals Project. (2011). Shrew Mole Range (Reverse Polygon Mask): San Francisco Bay Area, California, 2008. Bay Area Open Space Council. Available at http://purl.stanford.edu/rz419vp0242. The following information describes, and should always accompany, the California Department of Fish and Game's California Wildlife Habitat Relationship System (CWHR) species distribution data. The data is organized into four folders according to the four major taxonomic groups in CWHR: amphibians, reptiles, birds and mammals. Each species is represented by a single shapefile and is named according to its 4 digit alpha-numeric CWHR ID code. The file lookup.xls contains a record for each species including its CWHR ID, scientific name, common name, and range map revision history. Each layer contains two attributes: a season code and a SHAPE_NAME or CWHR ID code. Season codes include S for summer-only, W for winter-only, and Y for yearlong. A few species have a migration-only stopover location mapped and represented with an "M". The CWHR System software contains species predictions for migration-only locations, yet most of these are not mapped. The CWHR species range maps are continually being reviewed and updated as new animal occurrence data becomes available, especially in digital format. While the original maps were digitized from 1:5,000,000 scale depictions of range, a major revision effort started in 1995 to have maps reviewed and delineated by species-level experts at a scale of 1:1,000,000. Maps dated later than 1995 are therefore much more detailed and precise in their representation of a species' range. Increasingly, species-level experts and CWHR staff have made every effort, where justified by the distribution of known species observations or known habitat associations, to represent a species' range with standard polygons of major geographic features in California such as mountain ranges, valleys, buffered river corridors, and ecological subsections of California. The smallest units of the "Ecological subregions of California: section and subsection descriptions" (Miles and Goudy, 1997. USDA Forest Service Report No. R5-EM-TP-005) capture areas with very similar soils, vegetation, precipitation, geology, climate, and geography. In cases where a population of a species is known to be isolated, its point location is buffered to a minimum radius of 2 miles. 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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Title: Rural Lands: San Francisco Bay Area, California, 2008
Contributors:- Polygon data
- 2011
- Bay Area Open Space Council
- Conservation Lands Network
- San Francisco Bay Area Upland Habitat Goals Project
- GreenInfo Network (Firm)
Summary: This polygon shapefile depicts rural lands in the nine county San Francisco Bay Area Region, California. This data was derived from the California Department of Conservation Farmland Mapping and Monitoring Program (FMMP) data. This dataset was developed to get a better regional understanding of the exurban sprawl issues in regions lying just beyond the suburbs of a city. The Conservation Lands Network (CLN) Project Team felt that parcels under ten acres generally resulted in more fragmented landscapes where conservation action is more challenging and biodiversity tends to be much lower. The dataset was developed by: 1) selecting out all parcels ten acres or less for each county; 2) eraising FMMP Urban Areas and Intensive Cultivated Land; 3) converting to a grid; 4) merging with a grid of the entire region to get 1,0 for null areas; and 5) running nearest neighbor statistcs type majority filter, rectangle neighbor, settings of 5, using the 1,0 field (this helps to fill in the road network and get rid of the streets in the congested areas). This data was integrated into the CLN Vegetation map as a new category for purposes of reducing the conservation goals in these areas. This dataset was developed/compiled for use in the San Francisco Bay Area Upland Habitat Goals Project, a Project used to identify a Conservation Lands Network (CLN) for biodiversity preservation to inform conservation investments and lasting cooperative conservation partnerships. The Conservation Lands Network GIS Database is the primary output of the Project. The data depicts the spatially explicit CLN that is recommended for the nine county San Francisco Bay Area Region, California. Bay Area Open Space Council, GreenInfo Network, Conservation Lands Network, and San Francisco Bay Area Upland Habitat Goals Project. (2011). Rural Lands: San Francisco Bay Area, California, 2008. Bay Area Open Space Council. Available at http://purl.stanford.edu/wr760cs8681. 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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Title: Hydrologic Sub Area Watersheds: San Francisco Bay Area, California, 2009
Contributors:- Polygon data
- 2011
- Bay Area Open Space Council
- Conservation Lands Network
- San Francisco Bay Area Upland Habitat Goals Project
- GreenInfo Network (Firm)
Summary: This polygon shapefile depicts a dissolve that was run on the Hydrologic Sub Areas for the nine county San Francisco Bay Area Region, California. Hydrologic Sub Areas are those ranging in size from 195-243 square miles or 125,000-155,999 acres (Myers & Peltz-Lewis, 2004). This data was derived from the California Watershed Map (CalWater version 2.2), a set of standardized watershed boundaries meeting standardized delineation criteria. The hierarchy of watershed designations consists of six levels of increasing specificity: Hydrologic Region (HR), Hydrologic Unit (HU), Hydrologic Area (HA), Hydrologic Sub Area (HSA), Super Planning Watershed (SPWS) and Planning Watershed (PWS). The primary purpose of CalWater is the assignment of a single, unique code to a specific watershed polygon. Watersheds are useful for many aspects of the Project, including development of watershed integrity analysis. These data were critical for the Fish and Riparian Focus Team portion of the Project. This dataset was developed/compiled for use in the San Francisco Bay Area Upland Habitat Goals Project, a Project used to identify a Conservation Lands Network (CLN) for biodiversity preservation to inform conservation investments and lasting cooperative conservation partnerships. The Conservation Lands Network GIS Database is the primary output of the Project. The data depicts the spatially explicit CLN that is recommended for the nine county San Francisco Bay Area Region, California. Bay Area Open Space Council, GreenInfo Network, Conservation Lands Network, and San Francisco Bay Area Upland Habitat Goals Project. (2011). Hydrologic Sub Area Watersheds: San Francisco Bay Area, California, 2009. Bay Area Open Space Council. Available at http://purl.stanford.edu/fz945kn8985. Source metadata and data available at: http://frap.cdf.ca.gov/data/frapgisdata-sw-calwater_download.php 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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Title: Percent Slope (30m): San Francisco Bay Area, California, 2011
Contributors:- Raster data
- 2011
- Bay Area Open Space Council
- Conservation Lands Network
- San Francisco Bay Area Upland Habitat Goals Project
- GreenInfo Network (Firm)
Summary: This raster dataset was derived from the 30 meter resolution Digital Elevation Model layer and depicts percent slope across the nine county San Francisco Bay Area Region, California. Slope is useful in a variety of analyses, including watershed integrity and identifying rugged terrain that is less susceptible to development. This dataset was developed/compiled for use in the San Francisco Bay Area Upland Habitat Goals Project, a Project used to identify a Conservation Lands Network (CLN) for biodiversity preservation to inform conservation investments and lasting cooperative conservation partnerships. The Conservation Lands Network GIS Database is the primary output of the Project. The data depicts the spatially explicit CLN that is recommended for the nine county San Francisco Bay Area Region, California. Bay Area Open Space Council, GreenInfo Network, Conservation Lands Network, and San Francisco Bay Area Upland Habitat Goals Project. (2011). Percent Slope (30m): San Francisco Bay Area, California, 2011. Bay Area Open Space Council. Available at http://purl.stanford.edu/rm437dj2771. United States Geological Survey National Map data: http://seamless.usgs.gov/ 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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Title: Highway Shields: San Francisco Bay Area, California, 2011
Contributors:- Point data
- 2011
- Bay Area Open Space Council
- Conservation Lands Network
- San Francisco Bay Area Upland Habitat Goals Project
- GreenInfo Network (Firm)
Summary: This point shapefile depicts location of Highway Shields for interstate, state and national highways in the nine county San Francisco Bay Area Region, California. This dataset was developed by the GreenInfo Network and is primarily used for cartography purposes. This dataset was developed/compiled for use in the San Francisco Bay Area Upland Habitat Goals Project, a Project used to identify a Conservation Lands Network (CLN) for biodiversity preservation to inform conservation investments and lasting cooperative conservation partnerships. The Conservation Lands Network GIS Database is the primary output of the Project. The data depicts the spatially explicit CLN that is recommended for the nine county San Francisco Bay Area Region, California. Bay Area Open Space Council, GreenInfo Network, Conservation Lands Network, and San Francisco Bay Area Upland Habitat Goals Project. (2011). Highway Shields: San Francisco Bay Area, California, 2011. Bay Area Open Space Council. Available at http://purl.stanford.edu/dv401gd2328. 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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Title: Winter Steelhead Distribution: San Francisco Bay Area, California, 2007
Contributors:- Line data
- 2011
- Bay Area Open Space Council
- Conservation Lands Network
- San Francisco Bay Area Upland Habitat Goals Project
- GreenInfo Network (Firm)
- Connie Shannon PSMFC/ CDFG
Summary: The data was clipped to the Bay Area. Winter Steelhead Distribution (CalFish) June 2007 Version This polyline shapefile depicts observation-based, stream-level geographic distribution of anadromous steelhead trout (Oncorhynchus mykiss irideus) during winter months in the nine county San Francisco Bay Area Region, California. It was developed for the express purpose of assisting with steelhead recovery planning efforts. The distributions reported in this dataset were derived from a subset of the data contained in the Aquatic Species Observation Database (ASOD), a Microsoft Access multi-species observation data capture application. ASOD is an ongoing project designed to capture as complete a set of statewide inland aquatic vertebrate species observation information as possible. ASOD observation data were used to develop a network of stream segments. These lines are developed by "tracing down" from each observation to the sea using the flow properties of United States Geological Survey National Hydrography Dataset (NHD) High Resolution hydrography. Lastly these lines, representing stream segments, were assigned a value of either Anad Present (Anadromous present) or Unsp Present (Unspecified O. mykiss present). The resulting layer consists of a set of lines representing the winter distribution of steelhead. This dataset represents stream reaches that are known or believed to be used by steelhead based on steelhead observations, thus, it contains only positive steelhead occurrences. The absence of distribution on a stream does not necessarily indicate that steelhead do not utilize that stream. Additionally, steelhead may not be found in all streams or reaches each year. This is due to natural variations in run size, water conditions and other environmental factors. The information in this dataset should be used as an indicator of steelhead presence/suspected presence at the time of the observation as indicated by the 'Late_Yr' (Latest Year) field attribute. The line features in the dataset may not represent the maximum extent of steelhead on a stream; rather it is important to note that this distribution most likely underestimates the actual distribution of steelhead. The individual observations may not have occurred at the upper extent of anadromous occupation. In addition, no attempt was made to capture every observation, so it should not be assumed that this dataset is complete for each stream. No additional data (habitat mapping, barriers data, gradient modeling, etc.) were utilized to either add to or validate the data. It is very possible that an anadromous observation in this dataset has been recorded above (upstream of) a barrier as identified in the Passage Assessment Database (PAD). In the future, we hope to perform a comparative analysis between this dataset and the PAD to identify and resolve all such discrepancies. Such an analysis will add rigor to and help validate both datasets. This dataset has recently undergone a review. Data source contributors as well as California Department of Fish and Wildlife (CDFW) fisheries biologists were provided the opportunity to review and suggest edits or additions during the review. Initially, data contributors were notified and invited to review and comment on the handling of the information that they provided. The distribution was then posted to an intranet mapping application and CDFW biologists were provided an opportunity to review and comment on the dataset. During this review, biologists were also encouraged to add new observation data. This resulting final distribution contains their suggestions and additions. Please refer to "Use Constraints" section below. This dataset was developed/compiled for use in the San Francisco Bay Area Upland Habitat Goals Project, a Project used to identify a Conservation Lands Network (CLN) for biodiversity preservation to inform conservation investments and lasting cooperative conservation partnerships. The Conservation Lands Network GIS Database is the primary output of the Project. The data depicts the spatially explicit CLN that is recommended for the nine county San Francisco Bay Area Region, California. Bay Area Open Space Council, GreenInfo Network, Conservation Lands Network, and San Francisco Bay Area Upland Habitat Goals Project. (2011). Winter Steelhead Distribution: San Francisco Bay Area, California, 2007. Bay Area Open Space Council. Available at http://purl.stanford.edu/jw390yx2678. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.