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TOPOGRID DERIVED 10 METER RESOLUTION DIGITAL ELEVATION MODEL OF CHARLESTON, AND PARTS OF BERKELEY, COLLETON, DORCHESTER AND GEORGETOWN COUNTIES, SOUTH CAROLINA
U.S. Geological Survey Open File Report 2005-1372
By Peter G. Chirico

2005

EXPLANATION

The purpose of developing a new 10m resolution digital elevation model (DEM) of the Charleston Region was to more accurately depict geologic structure, surfical geology, and landforms of the Charleston County Region. Previously, many areas northeast and southwest of Charleston were originally mapped with a 20 foot contour interval. As a result, large areas within the National Elevation Dataset (NED) depict flat terraced topography where there was a lack of higher resolution elevation data. To overcome these data voids, the new DEM is supplemented with additional elevation data and break-lines derived from aerial photography and topographic maps. The resultant DEM is stored as a raster grid at uniform 10m horizontal resolution.

TOPOGRAPHY AND LANDFORMS OF ECUADOR
U.S. Geological Survey Data Series 136
By Peter G. Chirico and Michael B. Warner

2005

EXPLANATION

The digital elevation model of Ecuador represented in this data set was produced from over 40 individual tiles of elevation data from the Shuttle Radar Topography Mission (SRTM). Each tile was downloaded, converted from its native Height file format (.hgt), and imported into a geographic information system (GIS) for additional processing. Processing of the data included data gap filling, mosaicking, and re-projection of the tiles to form one single seamless digital elevation model.

MOSAIC OF DIGITAL RASTER SOVIET 1:200,000 SCALE TOPOGRAPHIC MAPS OF AFGHANISTAN

U.S. Geological Survey Data Series 131

By Peter G. Chirico and Michael B. Warner

2005

This publication was completed under Interagency Agreement 306-P-00-04-00566-00 between the U.S. Agency for International Development and the U.S Geological Survey.

EXPLANATION

The data contained in this publication include scanned, geographically referenced digital raster graphics (DRGs) of Soviet 1:200,000 - scale topographic map quadrangles. The original Afghanistan topographic map series at 1:200,000 scale, for the entire country, was published by the Soviet military between 1985 and 1991(MTDGS, 85-91). Hard copies of these original paper maps were scanned using a large format scanner, reprojected into Geographic Coordinate System (GCS) coordinates, and then clipped to remove the map collars to create a seamless, topographic map base for the entire country

VOID-FILLED SRTM DIGITAL ELEVATION MODEL OF AFGHANISTAN

U.S. Geological Survey Data Series 130

By Peter G. Chirico and Boris Barrios

2005

This publication was completed under Interagency Agreement 306-P-00-04-00566-00 between the U.S. Agency for International Development and the U.S Geological Survey.

EXPLANATION

The purpose of this data set is to provide a single consistent elevation model to be used for national scale mapping, GIS, remote sensing applications, and natural resource assessments for Afghanistan's reconstruction.

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