Tool for fast rendering of TIN (Triangular Irregular Networks) surface in LandXML format into DEM (Digital Elevation Model) raster files in GeoTIFF format using OpenCL on CPU or GPU
- python3
- GDAL library with python bindings
- OpenCL runtime
sudo add-apt-repository ppa:ubuntugis/ppa
sudo apt-get update
sudo apt-get install python3-pip gdal-bin gdal-data python3-gdal clinfoHere is the list of OpenCL implementations: https://www.iwocl.org/resources/opencl-implementations/
Install runtime corresponding to your GPU
You can use universal runtime POCL and run render with CPU:
sudo apt install pocl-opencl-icdCheck if you have runtime installed
clinfo -linstall package using pip
pip3 install git+ssh://[email protected]/lekks/tin2demor checkout from git and run test
sudo apt-get install python3-pytest
py.test-3 testsusage: tin2dem.py [-h] [--pixel PIXEL] [--epsg EPSG] [--chunk CHUNK]
[--margins MARGINS] [--surface SURFACE] [-a]
input_tin output_tiff
positional arguments:
input_tin
output_tiff
optional arguments:
-h, --help show this help message and exit
--pixel PIXEL Pixel size
--epsg EPSG EPSG code
--chunk CHUNK Processing chunk size, optimal value may depend of your
GPU memory.Default is 256
--margins MARGINS Output DEM margins
--surface SURFACE Surface to render if multiple surfaces is found
-a, --autocad Autocad compatible output (shift on 1/2 pixels)
set PYOPENCL_CTX environment variable if you don't want choose runtime every time, for example:
PYOPENCL_CTX=0 tin2dem tin.xml dem.tif
Render example files from landxml.org
wget http://landxml.org/schema/LandXML-2.0/samples/Carlson%20Software/Olympus_Subdivision-2.0.xml
tin2dem Olympus_Subdivision-2.0.xml Olympus_Subdivision-2.0.tifMultiple surfaces:
wget http://landxml.org/schema/LandXML-1.1/samples/BLUERIDGE%20Analytics/siteops.xml
tin2dem siteops.xml siteops.tif --surface=4
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