Created
October 4, 2017 23:33
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trim NoData cells surrounding raster with GeoRaster package
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| import numpy as np | |
| import georasters as gr | |
| def trim_nodata(ras): | |
| ras.raster.unshare_mask() | |
| bbox = np.where(ras.raster.mask == False) | |
| g = ras.geot | |
| ymin = bbox[0].min() | |
| ymax = bbox[0].max() | |
| xmin = bbox[1].min() | |
| xmax = bbox[1].max() | |
| geo_transform = ((g[0] + (xmin * g[1])), g[1], g[2], (g[3] + (ymin * g[5])), g[4], g[5]) | |
| return gr.GeoRaster(ras.raster.data[ymin:ymax+1,xmin:xmax+1], | |
| geo_transform, | |
| nodata_value=ras.nodata_value, | |
| projection=ras.projection, | |
| datatype=ras.datatype) |
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