[mapserver-users] Stretching subset of a raster

[Lime, Steve D (MNIT)]

Hi Asen: Hmmm… What version of MapServer and GDAL? The scaling should be happening in GDAL before the data hit MapServer so the [pixel] values MapServer gets are already between 0-255 in both of your cases. What I don’t know is what GDAL does with values outside the scaling range – so with SCALE=10,20 what do 5 or 50 get mapped to.

Do you have a sample GeoTiff to play with?

--Steve

From: mapserver-users [mailto:mapserver-users-bounces at lists.osgeo.org] On Behalf Of Radov, Asen (GSFC-619.0)[UNIVERSITY OF MARYLAND]
Sent: Wednesday, June 12, 2019 3:40 PM
To: mapserver-users at lists.osgeo.org
Subject: [mapserver-users] Stretching subset of a raster

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Hello,

Can someone help me with this issue?
https://gis.stackexchange.com/questions/316651/mapserver-processing-scale-a-b-does-not-stretch-data<https://gcc01.safelinks.protection.outlook.com/?url=https%3A%2F%2Furldefense.proofpoint.com%2Fv2%2Furl%3Fu%3Dhttps-3A__gis.stackexchange.com_questions_316651_mapserver-2Dprocessing-2Dscale-2Da-2Db-2Ddoes-2Dnot-2Dstretch-2Ddata%26d%3DDwMGaQ%26c%3DApwzowJNAKKw3xye91w7BE1XMRKi2LN9kiMk5Csz9Zk%26r%3De281LxOLUXWX77lCDwwDG7yS4rW9wU7C6637XRybRqc%26m%3DNS38yaLTmsm6irtRXIRVXd-7QakCAwBaL1ubY3PECjs%26s%3DP-SLcTl5e-OHR1L68wOjGqdURUiDhstrL6ORn5w3rbY%26e%3D&data=02%7C01%7Csteve.lime%40state.mn.us%7C8bed199fd45341a12a8d08d6ef776981%7Ceb14b04624c445198f26b89c2159828c%7C0%7C0%7C636959693533127749&sdata=KbsYs7Is173nVr2We5iTpgMoY%2B00bGG9KXu1kSXlxlk%3D&reserved=0>
Any help is greatly appreciated.


Thank you,
Asen Radov

NASA Goddard Space Flight Center / Code 619
Phone: 301-614-6517
E-mail: asen.s.radov at nasa.gov<mailto:asen.s.radov at nasa.gov>

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