ESRI Shapefile

ESRI Shapefile
The Esri Shapefile or simply a shapefile is a popular geospatial vector data format for geographic information systems software. It is developed and regulated by Esri as a (mostly) open specification for data interoperability among Esri and other software products. Shapefiles spatially describe geometries: points, polylines, and polygons. These, for example, could represent water wells, rivers, and lakes, respectively. Each item may also have attributes that describe the items, such as the name or temperature.
 
In Erdas virtual gis it is possible to extrude buildings when using 3d shape files. We create the 3D shapefile in Arc Gis basing the elevations off the surface we use in the visualization. We then add individual building hieghts to the shape file which will put the foot print in its correct elevation on the surface. This extrusion process will extrude the buildings into 3D. This process then includes all positive extrusions as a height field, extruding from the roof downwards.

USA 3m 10m DEM Bundle

USA 3m 10m DEM Bundle

  The National Elevation Dataset (NED) is the primary elevation data product of the USGS. T..

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