[gdal-dev] About Gdal contour - Opinion

[Martin Chapman]

FYI...I use gdal contour a lot for placing Tactical Access Points in the
field for our customers.  Works really good in my opinion.

Martin

-----Original Message-----
From: gdal-dev-bounces at lists.osgeo.org
[mailto:gdal-dev-bounces at lists.osgeo.org] On Behalf Of Frank Warmerdam
Sent: Tuesday, September 16, 2008 10:11 AM
To: Antonio Pérez
Cc: gdal-dev at lists.osgeo.org
Subject: Re: [gdal-dev] About Gdal contour - Opinion

2008/9/16 Antonio Pérez <aperezcarro at yahoo.es>:
> Hello everybody
> I would want to know your opinion about gdal-contour
> I dont see messages about it into the list ....
> Do you use it ? What grade of results can be got ?

Antonio,

I know a few people use it though it isn't heavily used.

I'm pretty confident it does what it is supposed to do.

Note that it does *not* attempt to simpilfy the results so
you end up with very dense (points close together) contour
lines with roughly one segment per pixel crossed.

Also, be aware that the countours are just lines, and because
they just end at edges of he raster or nodata areas, they
aren't easy to form into polygons (if that is your goal).

Best regards,
-- 
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--
I set the clouds in motion - turn up   | Frank Warmerdam,
warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush    | Geospatial Programmer for Rent
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