[mapserver-users] gradient display of raster DEM data

[Smith, Michael ERDC-CRREL-NH]

John

The DATARANGE / COLORRANGE keywords will be fully documented by 6.2 but they have been present in MapServer for years (since 4.6 or so).

We used DATARANGE / COLORRANGE for dem display in this years FOSS4G WMS Benchmarking effort.

Mike

--
Michael Smith
US Army Corps
Remote Sensing GIS/Center

From: John Callahan <john.callahan at udel.edu<mailto:john.callahan at udel.edu>>
Date: Fri, 14 Oct 2011 16:55:59 -0400
To: <mapserver-users at lists.osgeo.org<mailto:mapserver-users at lists.osgeo.org>>
Subject: [mapserver-users] gradient display of raster DEM data

I know this has been asked before but I thought I'd ask to see if anything changed.

I'm looking to display a raster digital elevation model in mapserver.  My data is in flat files, img and tiff.  I'd like to display this data as a continuous gradient color range, rather than using CLASS categories/bins for specific colors.  Is it still tru ethat this is not possible, easily?

One method (passed to me on this list) was too generate the colored image I want in another program, using GMT or similar tool, then use that in mapserver.  This seems like the best option but is non-trivial to someone who hasn't done this before.  (though not terribly difficult.)

I also read about the use of DATARANGE and COLORRANGE in mapserver.  However, these are not in the documentation.  Are these available in trunk only?  A ticket was generated that seems to say this will be included with MS 6.2.  (http://trac.osgeo.org/mapserver/ticket/1305)  Any insight on whether this is still the plan?


Thanks for your help and advice.

- John

***********************************************
John Callahan, Research Scientist
Delaware Geological Survey, University of Delaware
URL: http://www.dgs.udel.edu
*************************************************

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