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

[Stephen Woodbridge]

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 <jukka.rahkonen at maanmittauslaitos.fi> wrote:
> 
> 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.
> 
> -Jukka-
> 
> 
> 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 lines between 8,000 and -10,000 meters, I was 
> think it would be handy to gdal_dem had a few more options to control 
> the range and direction of contour generation.
> 
> I also have played with gdal_calc to create an elevation and bathymetry 
> only files.
> 
> Thanks, I think I have workarounds for the moment.
> 
> -Steve W
> 
> 
> 
> 
> 
> --
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