[mapserver-users] gradient display of raster DEM data

[John Callahan]

Excellent!  Very cool method. I've used multiple classes for vectors but
didn't think about it for rasters. Thanks for the advice.

- John

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



On Mon, Oct 17, 2011 at 3:05 PM, Smith, Michael ERDC-CRREL-NH <
Michael.Smith at usace.army.mil> wrote:

>  John,
>
>  I got a larger color range by using multiple classes
>
>  LAYER
>   NAME "hillshade"
>   TYPE raster
>   TILEINDEX
> "/benchmarking/wms/2011/data/raster/DEM/bil_16int/dem_bil16int.shp"
>   PROCESSING "CLOSE_CONNECTION=DEFER"
>   PROJECTION
>        "+init=epsg:4326"
>   END
>   CLASS
>     STYLE
>       COLORRANGE  46 154 88 251 255 128
>       DATARANGE   1003 1800
>     END
>   END
>   CLASS
>     STYLE
>       COLORRANGE  251 255 128 224 108 31
>       DATARANGE   1800 2800
>     END
>   END
>  CLASS
>     STYLE
>       COLORRANGE   224 108 31  200 55 55
>       DATARANGE    2800 3500
>     END
>   END
>   CLASS
>     STYLE
>       COLORRANGE  200 55 55  215 244 244
>       DATARANGE   3500 4397
>     END
>   END
> END
>
>
>   From: John Callahan <john.callahan at udel.edu>
> Date: Mon, 17 Oct 2011 14:54:13 -0400
> To: "mapserver-users at lists.osgeo.org" <mapserver-users at lists.osgeo.org>
> Subject: Re: [mapserver-users] gradient display of raster DEM data
>
>  Thanks for all your responses.  I have COLORRANGE / DATARANGE working fine
> in my map file. Works very well.  I'm also looking at using gdaldem for a
> more custom color scale.  Thanks again.
>
> - John
>
>  ***********************************************
> John Callahan, Research Scientist
> Delaware Geological Survey, University of Delaware
> URL: http://www.dgs.udel.edu
> *************************************************
>
>
>
> On Fri, Oct 14, 2011 at 5:49 PM, Smith, Michael ERDC-CRREL-NH <
> Michael.Smith at usace.army.mil> wrote:
>
>>  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>
>> Date: Fri, 14 Oct 2011 16:55:59 -0400
>>
>> To: <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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>
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