6,953 results returned
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Title: Contours, 5 ft interval, Watershed area
Contributors:- Line data
- 2010
Summary: Elevation Contours of the Napa River Watershed Area, 5 foot interval. The area covered by this data is referred to as the Watershed Area because it lies within the Napa River Watershed which is roughly the western half of the county. The DTM is based on LiDAR data acquired in May of 2003.
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Title: Contours, 10 ft interval, Non-Watershed area
Contributors:- Line data
- 2010
Summary: Elevation Contours of Napa County for non-watershed Area, 10 foot interval. These are the 10 ft contours produced during the 2002/2003 Orthophotography Project. The area covered by this data is referred to as the Non-watershed Area because it lies outside the Napa River Watershed. The contours were mapped at a scale of 1"=400ft and meet National Map Accuracy standards at this scale. The vertical datum for the contours is NAVD88.
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Title: Spot Elevations, Watershed area
Contributors:- Point data
- 2010
Summary: Spot Elevation Points of the Napa River Watershed Area, 200 foot interval. The area covered by this data is referred to as the Watershed Area because it lies within the Napa River Watershed which is roughly the western half of the county. The data was originally delivered in 12,000 ft x 12,000 ft tiles. These were mosaiced together to create this layer.
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Title: Orthophoto Project Tile Boundaries
Contributors:- Polygon data
- 2002
Summary: Boundaries of the tiles used in the 2002 Orthophotography Project.
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Title: Interior contours, 200 scale
Contributors:- Line data
- 1999
Summary: Elevation contours corresponding to digital orthophotographs rectified to ground control corresponding to 200 scale mapping (1 inch = 200 feet) covering Marin County city-centered corridor and selected developed areas of West Marin. Five-foot contours interior to the Index contours (50 foot). Use in conjunction with C200IDX Index fifty-foot contours.
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Title: Index Contours, 200 scale
Contributors:- Line data
- 1999
Summary: Elevation contours corresponding to digital orthophotographs rectified to ground control corresponding to 200 scale mapping (1 inch = 200 feet) covering Marin County city-centered corridor and selected developed areas of West Marin. Fifty-foot Index contours. Use in conjunction with C200INT interior five-foot contours.
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Title: Interior contours, 400 scale
Contributors:- Line data
- 1999
Summary: Elevation contours corresponding to digital orthophotographs rectified to ground control corresponding to 400 scale mapping (1 inch = 400 feet) covering western portions of Marin County. Ten-foot interior contours. Use in conjunction with C400IDX index fifty-foot contours.
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Title: Index Contours, 200 scale
Contributors:- Line data
- 1999
Summary: Elevation contours corresponding to digital orthophotographs rectified to ground control at accuracies of 200 and 400 scale covering entire Marin County California. AutoCAd drawing files of five foot contours corresponding to 240 200-scale panels and ten foot contours corresponding to 151 400-scale panels. Drawings can be joined at seams. Produced by Towill Incorporated, a photogrammetry company.
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Title: Vienna, Austria, 1873 (Raster Image)
Contributors:- Raster data
- 2010
- Harvard Map Collection, Harvard College Library
- Gatti, Achilles R. von.
- Klemm, Ferdinand.
- Sommer & Comp.
Summary: This layer is a georeferenced raster image of the historic paper map entitled: Situations-Plan von Wien und Umbegung. It was published by Ferdinand Klemm in 1873. Scale [ca. 1:16,600]. Covers Vienna, Austria. Map in German.The image inside the map neatline is georeferenced to the surface of the earth and fit to the MGI 3-Degree Gauss Kruger 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 roads, railroads and stations, street railways, drainage, built-up areas and selected buildings, point of interest, fortification, city districts, ground cover, gardens, parks, and more. Relief shown by hachures. Includes indexes.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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Title: Principal Aquifers, New York State, 1998
Contributors:- Polygon data
- 1998
Summary: This data set contains the shallowest principal aquifers of New York State, portrayed as lines. The data set was developed as part of the effort to produce the maps published at 1:2,500,000 in the printed series "Ground Water Atlas of the United States". The published maps contain base and cultural features not included in these data. This data set was previously called Principal Aquifers of the 48 Contiguous United States. These data are intended for use in publications, at a scale of 1:2,500,000 or smaller. Due to the small scale, the primary intended use is for regional and national data display and analysis, rather than specific local data analysis.
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Title: National Rail Network 1:2,000,000
Contributors:- Line data
- 2001
Summary: The Rail Network is a comprehensive database of the nation's railway system including all railway mainlines, railroad yards, and major sidings in the continental U.S. at the 1:2,000,000 scale. The data set covers the 48 contiguous States plus the District of Columbia.
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Title: US Army Corps of Engineers Ports
Contributors:- Point data
- 2001
Summary: The US Army Corps of Engineers (USACE) Ports database is an extract from the National Waterway Network database consisting of 224 points coded as US Army Corps of Engineers ports.
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Title: U.S. Military Installations
Contributors:- Polygon data
- 2001
Summary: The United States Military Installations database contains the boundaries, location, and areal information for important military installations in the United States and Puerto Rico. The database includes 436 polygons that represent 365 military installations.
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Title: National Transportation Analysis Regions
Contributors:- Polygon data
- 2001
Summary: National Transportation Analysis Regions (NTAR) divide the U.S. into 89 areas that delineate the functional geography transportation demand.
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Title: Public Use Airports
Contributors:- Point data
- 2001
Summary: The Public-Use Airports database is a geographic point database of aircraft landing facilities in the United States and U.S. Territories. Attribute data is provided on the physical and operational characteristics of the landing facility, current usage including enplanements and aircraft operations, congestion levels and usage categories.
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Title: National Rail Network 1:2,000,000 Nodes
Contributors:- Point data
- 2001
Summary: The Rail Network is a comprehensive database of the nation's railway system including all railway mainlines, railroad yards, and major sidings in the continental U.S. at the 1:2,000,000 scale. The data set covers the 48 contiguous States plus the District of Columbia.
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Title: 106th Congressional District Boundaries
Contributors:- Polygon data
- 2001
Summary: The 106th Congressional District Boundaries data set contains geographic information for the political entities of the Congressional districts of the United States and U.S. Territories.
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Title: National Rail Network 1:100,000 Nodes
Contributors:- Point data
- 2001
Summary: The Rail Network is a comprehensive database of the nation's railway system including all railway mainlines, railroad yards, and major sidings in the continental U.S. at the 1:100,000 scale. The data set covers the 48 contiguous States plus the District of Columbia.
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Title: National Rail Network 1:100,000
Contributors:- Line data
- 2001
Summary: The Rail Network is a comprehensive database of the nation's railway system including all railway mainlines, railroad yards, and major sidings in the continental U.S. at the 1:100,000 scale. The data set covers the 48 contiguous States plus the District of Columbia.
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Title: Intermodal Terminals
Contributors:- Point data
- 2001
Summary: The Intermodal Terminal Facilities data set contains geographic data for trailer-on-flatcar (TOFC) and container-on-flatcar (COFC) highway rail and/or rail-water transfer facilities in the United States. Attribute data specify the intermodal connections at each facility; i.e., the modes involved in the intermodal transfer, the AAR reporting marks of the railroad serving the facility, the type of cargo (always containers/trailers), and the direction of the transfer.