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transparent hillshade cooking guide using gdal
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| Ingredients: | |
| - a decent DEM | |
| - gdal | |
| - some computer | |
| # compute grayscale hillshade using gdaldem | |
| gdaldem hillshade -compute_edges you_dem_file hillshade.tif | |
| # in another bowl, prepare the following shade.ramp file | |
| 0 0 0 0 255 | |
| 32 0 0 0 240 | |
| 64 0 0 0 180 | |
| 96 0 0 0 120 | |
| 220 0 0 0 0 | |
| 221 255 255 255 0 | |
| 255 255 255 255 192 | |
| #other option (smoother shades) | |
| 0 0 0 0 255 | |
| 220 0 0 0 0 | |
| 221 255 255 255 0 | |
| 255 255 255 255 192 | |
| #and third one if you want only shades | |
| 0 0 0 0 255 | |
| 220 0 0 0 0 | |
| 255 0 0 0 0 | |
| # stir together using gdaldem color-relief | |
| gdaldem color-relief hillshade.tif -alpha shade.ramp hillshade-overlay.tif | |
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It would be awesome if you could include some output examples. Thanks for the info!