tif files with blast2dem

[Luka Šolar]

Hello

I have las files with tiles 2500mx2500m. is it possible to write tif+tfw file with resolution of 0.5 meter with pixel coordinates on half meter  (0.5 and 0.0..not 0.25 or 0.75) with tif file that have 5001 rows and collums, so to have middle of the pixels around all tile

Thanks for reply

Regards

Luka

[Martin Isenburg]

Hello Luka.

If you use las2dem or blast2dem a buffer is needed and then things are a bit more complex. If you use lasgrid or lascanopy then you can do this as follows:

Generate a usual 50 centimeter raster:

lasgrid -i ..\data\fusa.laz -step 0.5 -o fusa_50cm.asc

more fusa_50cm.asc

ncols 500

nrows 500

xllcorner 277750.000000

yllcorner 6122250.000000

cellsize 0.500000

NODATA_value -9999.0

-9999.0 45.34 45.07 -9999.0 42.40 -9999.0 42.42 42.42 42.41 [...]

Generate a 50 centimeter raster shifted by 25 centimeter:

lasgrid -i ..\data\fusa.laz -step 0.5 -grid_ll 0.25 0.25 -o fusa_50cm_shifted_25cm.asc

more fusa_50cm_shifted_25cm.asc

ncols 501

nrows 501

xllcorner 277749.750000

yllcorner 6122249.750000

cellsize 0.500000

NODATA_value -9999.0

-9999.0 -9999.0 -9999.0 -9999.0 -9999.0 -9999.0 42.42 42.42 42.41 -9999.0 42.43 [...]

Should work the same with TIF.

Martin @rapidlasso

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