Thanks I have not seen the raster common option file thing. I’ll look at it.
Sent from my iPhone
> On Oct 31, 2019, at 2:11 PM, jratike80
> wrote:
>
> Hi,
>
> One more suggestion, have you tried the -fl option "Name one or more “fixed
> levels” to extract"? Requires some writing but only o
Hi,
One more suggestion, have you tried the -fl option "Name one or more “fixed
levels” to extract"? Requires some writing but only once if you save the
list into an optfile https://gdal.org/programs/raster_common_options.html. I
haven't tried the option with hundreds of fixed levels, though.
-J
Jukka,
Thanks! After trying shapefile and exceeding 2GB, I switched to postgres
and deleted the elevation as you suggested.
I'm working with a global relief model the includes both elevation and
bathymetry depth over the whole world at about 15 arc-sec/pixel. I
generates a lot of contour lin
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
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://gd
Hi,
I want to use gdal_contour to generate shapefile contours which is
pretty straight forward except I'm working with coastal relief data that
has both elevation and bathymetry. I only want contours for the bathymetry.
I tried setting the -off -5 and -i -5 with the idea that this would
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