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602 results returned

  1. Title: Impervious Areas, Cayuga Lake watershed, 2003

    Contributors:

    Summary: This dataset delineates impervious surfaces within the Cayuga Lake Watershed. However, the current dataset is limited to Cayuga County. These polygons were digitized from aerial imagery from 2003, using a combination of automatic and manual methods. This geographic dataset was developed by the Cayuga Lake Watershed Network as part of a larger project, in conjunction with Dr. Douglas Haith and Cornell University, to model nutrient loading in the Cayuga Lake watershed. The model used is the Generalized Watershed Loading Function (Haith and Shoemaker, 1987). Haith, D.A. and L.L. Shoemaker, 1987. Generalized Watershed Loading Functions for Stream Flow Nutrients. Water Resources Bulletin, 23(3), pp. 471-478.

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  2. Title: Sewer Systems Extent, Cayuga Lake watershed, 2007

    Contributors:

    Summary: This dataset contains polygons showing the extent all sewer systems in the Cayuga Lake Watershed as of September 2007, based upon data provided by individual municipalities in the watershed. This geographic dataset was developed by the Cayuga Lake Watershed Network as part of a larger project, in conjunction with Dr. Douglas Haith and Cornell University, to model nutrient loading in the Cayuga Lake watershed. The model used is the Generalized Watershed Loading Function (Haith and Shoemaker, 1987). Haith, D.A. and L.L. Shoemaker, 1987. Generalized Watershed Loading Functions for Stream Flow Nutrients. Water Resources Bulletin, 23(3), pp. 471-478.

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  3. Title: Residental Wastewater Systems, Cayuga Lake watershed, 2007

    Contributors:

    Summary: This point dataset identifies all residential structures in the Cayuga Lake Watershed, and indiciates whether it is served by a municipal sewer system or is expected to have an on-site waste management system. TIGER Census 2000 data was used to estimate the number of individuals per residential structure. This geographic dataset was developed by the Cayuga Lake Watershed Network as part of a larger project, in conjunction with Dr. Douglas Haith and Cornell University, to model nutrient loading in the Cayuga Lake watershed. The model used is the Generalized Watershed Loading Function (Haith and Shoemaker, 1987). Haith, D.A. and L.L. Shoemaker, 1987. Generalized Watershed Loading Functions for Stream Flow Nutrients. Water Resources Bulletin, 23(3), pp. 471-478.

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  4. Title: Land Use and Land Cover, Cayuga Lake watershed, 2004

    Contributors:

    Summary: The dataset depicts land use/cover in the Cayuga Lake Watershed. This geographic dataset was constructed using a multi-resource approach. To map small scale land uses, high resolution aerial imagery available from the New York State Digital OrthoimageryProgram (NYSDOP) was interpreted by a trained GIS analyst according to a multi-tiered classification scheme similar to that used by Tompkins County, New York to map land use in 1995. To map large scale land uses and land cover types, two sets of Landsat Thematic Mapper images were analyzed. One set was analyzed by the USDA National Agricultural Statistics Service Research and Development Division, and published as the Cropland Data Layer for the state of New York. To distinguish between different forest cover types, Landsat-5 TM images were radiometrically and geographically corrected, and analyzed using a supervised classification procedure. These separate layers were overlayed to produce the final vector layer. This geographic dataset was developed by the Cayuga Lake Watershed Network as part of a larger project, in conjunction with Dr. Douglas Haith and Cornell University, to model nutrient loading in the Cayuga Lake watershed. The model used is the Generalized Watershed Loading Function (Haith and Shoemaker, 1987). Haith, D.A. and L.L. Shoemaker, 1987. Generalized Watershed Loading Functions for Stream Flow Nutrients. Water Resources Bulletin, 23(3), pp. 471-478.

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  5. Title: A Map of Lewis and Clark's Track, Across the Western Portion of North America From the Mississippi to the Pacific Ocean; By Order of the Executive of the United States, in 1804, 5 & 6. Copied by Samuel Lewis from the Original Drawing of Wm. Clark. Smal. Harrison fct (Raster Image)

    Contributors:

    Summary: This layer is a georeferenced image of a map of the track of Lewis and Clark in the western United States, created in 1804. The original map appears in 'History Of The Expedition Under The Command Of Captains Lewis And Clark, To The Sources Of The Missouri, Thence Across The Rocky Mountains And Down The River Columbia To The Pacific Ocean. Performed During The Years 1804-5-6. By order of the Government Of The United States. Prepared For The Press By Paul Allen, Esquire. In Two Volumes. Vol. I. Philadelphia: Published By Bradford And Inskeep, New York. J. Maxwell, Printer. 1814 ... Vol. II.'The historic map layers in the Google Earth Rumsey Map Collection have been selected by David Rumsey from his large collection of historical maps, as well as some from other collections with which he collaborates. All the maps contain rich information about the past and represent a sampling of time periods, scales, and cartographic art, resulting in visual history stories that only old maps can tell. Each map has been georeferenced by Rumsey, thus creating unique digital map images that allow the old maps to appear in their correct places on the modern globe. Some of the maps fit perfectly in their modern spaces, while othersgenerally earlier period mapsreveal interesting geographical misconceptions of their time. Cultural features on the maps can be compared to the modern satellite views using the slider bars to adjust transparency. The result is an exploration of time as well as space, a marriage of historic cartographic masterpieces with innovative contemporary software tools.

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  6. Title: Zambian 2006 to 2010 Constituency and Ward Boundaries

    Contributors:

    Summary: This polygon shapefile represents best estimates of ward and constituency boundaries in Zambia based on available sources. The primary source for this layer is a set of printed maps of 2006-2010 ward and constituency boundaries provided by the Election Commission of Zambia (ECZ) to the author. However, these printed maps had three issues: (1) The packet was incomplete (maps for some constituencies and districts showed planned post-2010 ward boundaries rather than 2006-2010 actual wards); (2) The different layers in the file -- boundary edges, geographic features, and city locations -- had misalignments in many places, making it impossible to use geographic features for geo-referencing; (3) Some (small) wards could not be distinguished from one another in the printed maps. As a result: (1) Not all wards are included (see ward names and codes in the attribute definitions); (2) Georeferencing was primarily accomplished by matching stretches of constituency boundaries in the 2006-2010 maps with those in a Zambian Central Statistics Office-provided map of constituency and ward boundaries from the 2001-2005 period that had clearly not been changed between 2005 and 2006. Some additional inferences were made using of satellite maps of rivers and cities where boundaries were clearly drawn to follow rivers or large roads; (3) some wards have been merged into single polyons. This dataset is intended for researchers, students, policy makers and the general public, for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production, or to provide a basemap to support graphical overlays and analysis with other spatial data. Eubank, Nicholas. (2014). Zambian 2006 to 2010 Constituency and Ward Boundaries. Available at: http://purl.stanford.edu/yc436vm9005. 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: (Composite Map) (Facsimile) Rocque's Map of London. 1746 (Raster Image)

    Contributors:

    Summary: This raster layer is a georeferenced image of a map titled "Composite Map: (Facsimile) Rocque's Map of London. 1746." Published in 1919, this composite map is considered one of the best facsimiles of the original Rocque Map ("A plan of the cities of London and Westminster, and borough of Southwark"), created by John Rocque and first published in 1746. A scanned version of this map available from The David Rumsey Map Collection was georeferenced by the Kindred London mapping project. The broad goal of the Kindred London project is to create four digitized road networks from four historic maps of London that will be used for an online, interactive web platform that will allow users to experience what it would have been like to travel the streets of London.

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  8. Title: Philadelphia, Pennsylvania, 1750 (Raster Image)

    Contributors:

    Summary: This layer is a georeferenced raster image of the historic paper map entitled: A map of Philadelphia and parts adjacent : with a perspective view of the State-House, by N. Scull and G. Heap. Facsimile of a 1750 map republished by Benj. R. Boggs in 1893. Scale [ca. 1:65,000]. The image inside the map neatline is georeferenced to the surface of the earth and fit to the Pennsylvania South State Plane Coordinate System NAD83 (in Feet) (Fipszone 3702). 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 roads, drainage, selected rural buildings with occupants' names, and more. Relief is shown pictorially. Includes text, distance table, ill., and ground-level view of the Statehouse (later Independence Hall). Facsimile of state showing estate of Wm. Allen near Germantown with his name added to the 'Table of distances'. This layer is part of a selection of digitally scanned and georeferenced historic maps from The Harvard Map Collection as part of the Imaging the Urban Environment project. Maps selected for this project represent major urban areas and cities of the world, at various time periods. These maps typically portray both natural and manmade features at a large scale. The selection represents a range of regions, originators, ground condition dates, scales, and purposes.

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  9. Title: To the Honourable Thomas Penn and Richard Penn, Esqrs., true & absolute proprietaries & Governours of the Province of Pennsylvania & counties of New-Castle, Kent & Sussex on Delaware this map of the improved part of the Province of Pennsylvania

    Contributors:

    Summary: Facsim. of: Philadelphia : sold by the author, Nicholas Scull, 1759. Relief shown pictorially. Shows county boundaries.

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  10. Title: To the Honourable Thomas Penn and Richard Penn, Esqrs., true & absolute proprietaries & Governours of the Province of Pennsylvania & counties of New-Castle, Kent & Sussex on Delaware this map of the improved part of the Province of Pennsylvania

    Contributors:

    Summary: Facsim. of: Philadelphia : sold by the author, Nicholas Scull, 1759. Relief shown pictorially. Shows county boundaries. 1894-1899

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  11. Title: A map of Philadelphia and parts adjacent

    Contributors:

    Summary: This is state 2, lacking the table of distances and with more detail of the New Jersey shore and other engraving differences, of the map of the same title in Gentleman's Magazine, vol. 23 (1753), opp. p. 373. Shows rural buildings with occupants' surnames.

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  12. Title: Carte des lacs du Canada

    Contributors:

    Summary: Reproduced from the William L. Clements Library, University of Michigan.; Originally published in Paris, in 1774.; In French.; This map is Plate II of a Bicentennial Series on historical maps of the Great Lakes and Michigan.; Includes notes by historian, Wystan Stevens. 51 x 37 Centimeters Scale approximately 1:4,000,000 General Map Collection

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  13. Title: The King plats of the city of Washington in the District of Columbia, 1803.

    Contributors:

    Summary: Shows block outlines, numbers, dimensions, and street widths. Boundaries of pre-existing landholdings and waterfront lots and numbers shown on some sheets. Accompanied by title sheet, page headed "Note" with text of letters as late as 1888, and map index sheet. Title from accompanying title sheet. Sheet orientation differs. Sheets numbered: No. 1, No. II [thru] No. XVI. 66 x 90 centimeters Scale not given. City Maps

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  14. Title: Les Indes Orientales : ouè sont distingueás les empires et royaumes qu'elles contiennent tireáes du Neptune Oriental

    Contributors:

    Summary: Cartographic Details: Scale approximately 1:8,500,000. Relief shown pictorially."Guill. Delahaye sculp." From Atlas universel, by Gilles & Didier Robert de Vaugondy, 1749-1792. 47 x 55 centimeters Scale approximately 1:8,500,000 Ames Library of South Asia Maps

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  15. Title: A map of North America: with the European settlements & whatever else is remarkable in ye West Indies, from the latest and best observations; R. W. Seale delin. et sculp.

    Contributors:

    Summary: Relief shown pictorially. Shows California as an island. Shows locations of European cities and towns, Indian towns, forts and castles. From Paul Rapin de Thóyras "The History of England", continued by N. Tindal. London, 1744. v. 3; see Maps of America p. 571. 1 map; 37 x 46 cm.

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  16. Title: Broomfield County, Colorado land parcels, 2009

    Contributors:

    Summary: Land parcels in Broomfield County, Colorado, 2009. These data were taken from The City and County of Broomfield GIS database layers and the Broomfield Assessor database.

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  17. Title: Sewer District: Sacramento County, California, 2015

    Contributors:

    Summary: This polygon shapefile depicts the service boundary fo the Sacramento Area Sewer District (SASD) in the County of Sacramento, California. The SASD is a sewer utility providing service to more than one million residential, commercial and industrial customers in the Sacramento region, including the unincorporated areas of Sacramento County; the cities of Citrus Heights, Rancho Cordova, and Elk Grove; as well as portions of the cities of Folsom and Sacramento. SASD is overseen by a Board of Directors consisting of the five Sacramento County Supervisors and the mayors (or their designees) of the cities of Citrus Heights, Elk Grove, Folsom, Rancho Cordova and Sacramento. This layer is part of a collection of data originally produced for Sacramento County, California. The Sacramento County Geographic Information Systems (GIS) unit falls under the purview of the Sacramento County Department of Technology and is tasked with initiating, integrating and promoting the use of GIS Technology in the support of County business goals and objectives. This coverage can be used for basic applications, such as viewing, querying and map output production, or to provide a base map to support graphical overlays and analyses of geospatial data. Sacramento County GIS. (2015). Sewer District: Sacramento County, California, 2015. Sacramento County, California. Available at http://purl.stanford.edu/cw962mp1304. Sacramento Area Sewer District: http://www.sacsewer.com/ Sacramento County makes no representations about the suitability of these GIS data for any purpose. All such data are provided "as is" without warranty of any kind. Sacramento County hereby disclaims all warranties and conditions with regard to these data, including all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement. In no event shall Sacramento County be liable for any special, indirect or consequential damages or any damages whatsoever resulting from loss of use, data or profits, whether in an action of contract, negligence or other tort action, arising out of or in connection with the use or performance of software, documents, provision of or failure to provide services, or information available from these data. These data could include technical inaccuracies or typographical errors. Changes are periodically added to the information herein. Furthermore, Sacramento County and/or its respective suppliers may make improvements and/or changes in these data at any time. 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: Rivers: Sacramento County, California, 2015

    Contributors:

    Summary: This polyline shapefile depicts centerlines of Rivers in the County of Sacramento, California: American, Cosumnes, Delta, Mokelumne, Sacramento and San Joaquin. This layer is part of a collection of data originally produced for Sacramento County, California. The Sacramento County Geographic Information Systems (GIS) unit falls under the purview of the Sacramento County Department of Technology and is tasked with initiating, integrating and promoting the use of GIS Technology in the support of County business goals and objectives. This coverage can be used for basic applications, such as viewing, querying and map output production, or to provide a base map to support graphical overlays and analyses of geospatial data. Sacramento County GIS. (2015). Rivers: Sacramento County, California, 2015. Sacramento County, California. Available at http://purl.stanford.edu/cz795rc2399. Sacramento County makes no representations about the suitability of these GIS data for any purpose. All such data are provided "as is" without warranty of any kind. Sacramento County hereby disclaims all warranties and conditions with regard to these data, including all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement. In no event shall Sacramento County be liable for any special, indirect or consequential damages or any damages whatsoever resulting from loss of use, data or profits, whether in an action of contract, negligence or other tort action, arising out of or in connection with the use or performance of software, documents, provision of or failure to provide services, or information available from these data. These data could include technical inaccuracies or typographical errors. Changes are periodically added to the information herein. Furthermore, Sacramento County and/or its respective suppliers may make improvements and/or changes in these data at any time. 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: Libraries: Sacramento County, California, 2015

    Contributors:

    Summary: This poygon shapefile depicts building footprints for all 28 library facilities in the County of Sacramento, California. A Building Footprint is the area of a building that falls directly beneath the building and shares the same perimeter as the building or the roofline, therefore indicating the location of a building or structure. This layer is part of a collection of data originally produced for Sacramento County, California. The Sacramento County Geographic Information Systems (GIS) unit falls under the purview of the Sacramento County Department of Technology and is tasked with initiating, integrating and promoting the use of GIS Technology in the support of County business goals and objectives. This coverage can be used for basic applications, such as viewing, querying and map output production, or to provide a base map to support graphical overlays and analyses of geospatial data. Sacramento County GIS. (2015). Libraries: Sacramento County, California, 2015. Sacramento County, California. Available at http://purl.stanford.edu/tf529mf7608. Sacramento County makes no representations about the suitability of these GIS data for any purpose. All such data are provided "as is" without warranty of any kind. Sacramento County hereby disclaims all warranties and conditions with regard to these data, including all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement. In no event shall Sacramento County be liable for any special, indirect or consequential damages or any damages whatsoever resulting from loss of use, data or profits, whether in an action of contract, negligence or other tort action, arising out of or in connection with the use or performance of software, documents, provision of or failure to provide services, or information available from these data. These data could include technical inaccuracies or typographical errors. Changes are periodically added to the information herein. Furthermore, Sacramento County and/or its respective suppliers may make improvements and/or changes in these data at any time. 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: City Boundaries: Sacramento County, California, 2015

    Contributors:

    Summary: This polygon shapefile depicts administrative boundaries of Cities over which the County of Sacramento, California holds authority: Citrus Heights, Elk Grove, Folsom, Galt, Isleton, Rancho Cordova and Sacramento. This coverage does not include unincorporated areas. This layer is part of a collection of data originally produced for Sacramento County, California. The Sacramento County Geographic Information Systems (GIS) unit falls under the purview of the Sacramento County Department of Technology and is tasked with initiating, integrating and promoting the use of GIS Technology in the support of County business goals and objectives. This coverage can be used for basic applications, such as viewing, querying and map output production, or to provide a base map to support graphical overlays and analyses of geospatial data. Sacramento County GIS. (2015). City Boundaries: Sacramento County, California, 2015. Sacramento County, California. Available at http://purl.stanford.edu/kq595nj1377. This layer is coöperatively maintained by Sacramento County and the cities of Citrus Heights, Elk Grove, Folsom, Galt and Sacramento. Sacramento County Cities Within the County: http://www.saccounty.net/Government/Pages/CitieswithintheCounty.aspx Sacramento County makes no representations about the suitability of these GIS data for any purpose. All such data are provided "as is" without warranty of any kind. Sacramento County hereby disclaims all warranties and conditions with regard to these data, including all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement. In no event shall Sacramento County be liable for any special, indirect or consequential damages or any damages whatsoever resulting from loss of use, data or profits, whether in an action of contract, negligence or other tort action, arising out of or in connection with the use or performance of software, documents, provision of or failure to provide services, or information available from these data. These data could include technical inaccuracies or typographical errors. Changes are periodically added to the information herein. Furthermore, Sacramento County and/or its respective suppliers may make improvements and/or changes in these data at any time. 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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