Display 8-Bit Signed Rasters with Negative Values in QGIS / MapServer

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When loading 8-bit signed rasters with values from -128 to 127 into QGIS or MapServer, negative numbers are not recognized. Is there a way to change the default display settings in QGIS and/or configure the map file for MapServer to recognize the negative values? For MapServer, if classes were setup for the display properties would that work (may just try this out). FYI - These rasters display correctly in ArcGIS Desktop.

Any suggestions would be helpful. Thanks.



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