[gdal-dev] Question on gdal_contour and limiting the range of contours generated.

[jratike80]

Second thought, perhaps I would just delete unnecessary contour lines
afterwards instead of flattening the DEM.

gdal_contour -f gpkg -a elev -off -121.92 -i 1.524
bathy-value/crm_vol2.nc.tif bathy-contours/crm_vol2.nc-5.gpkg

ogrinfo -sql "delete from crm_vol2.nc-5 where elev>0"
bathy-contours/crm_vol2.nc-5.gpkg

ogrinfo -sql "VACUUM" bathy-contours/crm_vol2.nc-5.gpkg

-Jukka-



jratike80 wrote
> Hi,
> 
> I believe I would use gdal_calc https://gdal.org/programs/gdal_calc.html
> and
> make the terrain above the sea level flat before creating the contours.
> And
> I would avoid shapefiles and use GeoPackage as output format. 
> 
> There is a button "Edit on GitHub" in the top-right corner on page
> https://gdal.org/programs/gdal_contour.html, feel free to test it.
> 
> -Jukka Rahkonen-





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