Free GIS Datasets
OpenStreetMap
Data Sources
http://download.geofabrik.de/index.htmlProducts
PostGIS Database (imposm)
National Elevation Dataset (USGS)
Data Sources
1/3s tiles, ArcGrid: ftp://rockyftp.cr.usgs.gov/vdelivery/Datasets/Staged/NED/13/ArcGrid/Products
Contours
gdal_contour -i 15.24 -a ele_m n44w075.tif n44w075c50f.shp
| Feet | Meters |
| 10 | 3.048 |
| 20 | 6.096 |
| 25 | 7.62 |
| 50 | 15.24 |
| 100 | 30.48 |
Shaded Relief
gdaldem hillshade -s 111120 n44w075.tif n44w075hs.tif-- StephenCavilia - 11 Nov 2015
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