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I recently discovered an ArcMap answer to my question: The image analysis window has swipe tool which is exactly the tool I was after. http://i.imgur.com/h5rBUkQ.png


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unfortunately gmdx could not be opened with previous versions of erdas. In fact gmdx is an xml file format that you can open it in a text support sotware like notepad. Note operators and data values.this way is useful in case of gmdx could not be opened even in recent versions due to bad data value or expression.however you can use this way to understand ...


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In model maker make a simple model by: add a raster later variable and provide image name to be split place a function object and link with raster input just provided as above. double click on function object & now you will see a raster variable listed in top left corner & 3 more names (assuming 3 bands in raster) with suffix (band number) Select ...


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It is maybe not really the answer but I canĀ“t post it as comment... @Mr. Che I tried to calculate Forest Index following paper Wentao Ye; Xi Li; Xiaoling Chen and Guo Zhang: A spectral index for highlighting forest cover from remotely sensed imagery", Proc. SPIE 9260, Land Surface Remote Sensing II, 92601L (November 8, 2014); doi:10.1117/12.2068775 so as ...


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DEM = digital elevation model DTM = digital terrain (topography?) model DSM = digital surface model Sort of the same thing - distinctions can be made if considering just terrain or also objects on that terrain. See What is the difference between DEM, DSM and DTM? As for Grid Format, as mkennedy says, my guess would be the native raster format Esri uses. ...


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In general, there are two approaches to classification: pixel-based and object-based: Pixel-based: Each spatial pixel is evaluated by itself against a set classification parameters. In this case, pansharpening the image will not help you at all. Object-based / Segmentation: In this approach pixels are evaluated as groups and segmented into groups based on ...



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