CDO

Hello,

First I am a complete beginner in cdo.
But, here is a CSV file with columns id, x, y, z (where x = lon, y = lat). I want to convert it to an AAIgrid format. Gdal should be able to do this, but it's telling me that the grid is irregular. However, all points are aligned in rows and columns. I could use gdal_grid, but I don't want to interpolate any missing values.

I'm wondering if cdo is more powerful than gdal in solving this problem?

Here are my failed gdal commands:

xmin=1617923.94
ymin=8142996.42
xmax=1679923.94
ymax=8211996.42
$f=p.csv

gdalbuildvrt -a_srs EPSG:4326 -separate -overwrite -srcnodata "-999.0" build.vrt $f
gdalwarp -of VRT -ot Int32 -s_srs epsg:4326 t_srs epsg:3949 -te $xmin $ymin $xmax $ymax -tr 1000 -1000 -srcnodata -999.0 -dstnodata -9999  build.vrt test.vrt
gdal_translate -of AAIGrid -ot Int32 -co DECIMAL_PRECISION=5 test.vrt result.grd

Many thanks