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DEM quality

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04-25-2022 02:37 AM
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StephanieParadis
New Contributor

StephanieParadis_0-1650879349892.png

Hello everyone. I merged several DEMs to make a map for a watershed. However, the quality seem off, showing some weird grid lines when I try to make any transformation. For example here is when I try to convert into slopes (notice the lines?) How can I fix this?

Thank you,

Stéphanie

 

2 Replies
ThomasHamill
Occasional Contributor II

@StephanieParadis, this usually happens if the Pixel Type (8 Bit unsigned integer, 32 Bit float, etc.) Projection, or File Format with Extension (Erdas Imagine/.img, GeoTiff/.tif, Jpeg/.jpg) changes between the source datasets and the final result during a mosaic.

 

Have you checked to make sure your resulting mosaic raster has the same properties as the input datasets?

ThomasHamill_0-1650896963230.png

 

Kindest Regards,

t
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ThomasHamill
Occasional Contributor II

@StephanieParadis, were you able to work through the problem with your DEM?

Kindest Regards,

t
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