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Color DEM looks like a rainbow; RGB map is fine

Good morning,

I processed a map yesterday (WuXi STA) with 794 or so images. The RGB map looks great, but the color DEM looks like a rainbow. I've processed again this morning with the same results. This has never happened before and I've processed this jobsite once a month for over 2 1/2 years. Any help you can provide would be great. Thanks!

Marc Sandlhauser

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This usually happens when images are taken while traveling forwards on one pass and then backwards on the next. The other time this happens is when you are really low overlap, which seems to be the case here:

If you care about your elevation results you really need to follow the Data Collection guidelines which are agreed to at the time of upload and give the system at least 16X coverage for everything. This means using at least 75% overlap. This looks like 60-65% or so. If you were not using such a good camera (M3E) it probably wouldn't have turned out at all. Just bump up that overlap and things will start looking good again. 

 

Zane
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