Changes between Version 24 and Version 25 of Help/LeicaLidarDems
- Timestamp:
- Nov 23, 2010, 2:40:19 PM (14 years ago)
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Help/LeicaLidarDems
v24 v25 86 86 and perform the interpolation step (with precision maintaining commands before and after as above): 87 87 88 8. 88 8. Re-set the resolution to 2 for the LiDAR before any calculations. 89 '''`g.region res=2`''' 90 91 9. 89 92 '''`r.mapcalculator amap=lidar_mosaic formula=100*A outfile=lidar_mosaicx100 help=-`''' 90 93 … … 105 108 Once you have an SRTM DEM of sufficient coverage you can patch the LIDAR and SRTM DEMs together, such that the LIDAR takes precedence. This means the lidar_dem should be the first of the input maps on the r.patch command. If the mask is still applied then remove it before patching: 106 109 107 9. '''`r.mask input=<maskmapname> -r`'''110 10. '''`r.mask input=<maskmapname> -r`''' 108 111 109 1 0. '''`r.patch in=lidar_dem,srtm_dem out=combined_dem`'''112 11. '''`r.patch in=lidar_dem,srtm_dem out=combined_dem`''' 110 113 111 114 [[Image(combo_srtm_lidar.png,width=100)]] … … 117 120 To output the DEM (as ascii) and set null values as 0: 118 121 119 1 1. '''`r.out.ascii input=<DEMmapname> output=<outputDEMfile> null=0`'''122 12. '''`r.out.ascii input=<DEMmapname> output=<outputDEMfile> null=0`''' 120 123 121 124 ------------