Convert GeoTIFF raster data to rgba encoded PNG heightmaps
There are a lot of good sources for getting high resolution elevation data, though it is not available for all areas and the data is not always complete or free of noise. Here are some sources I used while making this program.
OpenTopography - 1 meter resolution Lidar scans with option to supress noise/trees and generate shaded relief maps, limited to specific areas within the US. Some data is restricted to users with .edu email address
USGS TNM - Covers a larger area than OpenTopography and has multiple resolutions available but has less options for pulling data from specific bounds
requires libgdal-dev to be installed on linux if on windows python with gdal can be installed using OSGeo4W
python3 map.py -h for usage instructions:
usage: map.py [-h] [-o OUTFILE] [-d DOWNSAMPLE] [-v VERTICAL SCALE] [-n] FILE
Convert GeoTIFF raster data to rgba encoded PNG heightmaps
positional arguments:
FILE file path for GeoTIFF (.tif) data
optional arguments:
-h, --help show this help message and exit
-o OUTFILE specify output file/path (default: heightmap.png)
-d DOWNSAMPLE skip over every n-1 data points for smaller image output (default: 1)
-v VERTICAL SCALE height multiplier - controls vertical resolution (default=100)
-n, --normalize subtract min height from height values