Created
June 30, 2021 14:45
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Process a directory of point cloud data into DSM geotiffs.
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| import argparse | |
| import os | |
| import pdal | |
| def generate_dsm(input_fn): | |
| """Given an input point cloud, create a DSM GeoTIFF""" | |
| def build_pipeline(): | |
| """Create a JSON pipeline for consumption by PDAL.""" | |
| file_prefix, ext = os.path.splitext(input_fn) | |
| return """ | |
| [ | |
| "%s", | |
| { | |
| "type": "filters.range", | |
| "limits": "returnnumber[1:1]" | |
| }, | |
| { | |
| "type": "writers.gdal", | |
| "filename": "%s_DSM.tif", | |
| "output_type": "idw", | |
| "gdaldriver": "GTiff", | |
| "resolution": 0.5, | |
| "radius": 1 | |
| } | |
| ]""" % (input_fn, file_prefix) | |
| json = build_pipeline() | |
| pipeline = pdal.Pipeline(json) | |
| pipeline.execute() | |
| parser = argparse.ArgumentParser(description="Convert point cloud data to DSM.") | |
| parser.add_argument("path", type=str, help="path to directory of LAS/LAZ to convert") | |
| args = parser.parse_args() | |
| directory = args.path | |
| print("Generating DSM from LAS/LAZ in {}".format(directory)) | |
| for f in os.listdir(directory): | |
| fn, ext = os.path.splitext(f) | |
| if ext == ".las" or ext == ".laz": | |
| print("-- processing {}".format(f)) | |
| generate_dsm("{}/{}".format(directory, f)) |
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