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I'd like to ask you for advice how to transform landsat images to real colour in ArcMap

December 10 2007 | 0 comments
Categories: Map Data, Symbology

I'd like to ask you for advice how to transform landsat images to real colour in ArcMap. Thanks

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the source images I downloaded was: https://zulu.ssc.nasa.gov/mrsid

Mapping Center Answer:

You can change the display properties of an image through the raster layer properties in ArcMap. Bear in mind that ArcGIS will display a maximum of three bands, even though your landsat image may have more. The ArcCatalog Options dialog has a tab specifically for rasters where you set which bands you want the software to display. You’ll need to identify which landsat bands correspond to Red, Green, and Blue, and when you add the image to ArcMap, the raster drawing method will apply the appropriate color to the bands you’ve selected.

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The issue with the imagery you downloaded from that site is that it is not true color data. The Landsat bands used to generate the MrSID images are:
7 - mid-infrared as red
4 - near-infrared as green
2 - visible green as blue
There is no way that you can make these look like 'true color'. Landsat image bands 1(R), (G), 3(B) are used for true color, which is why ESRI uses those as default settings for imagery. You will need to find another data source which stores the actual RGB values.

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