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#1
razornole

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Hello,

I was just wondering what are some of the methods that people use in ArcMap to remove these linear artifacts from a DEM so they don't show up in my Hillshade. The data are from USGS NED 10m.

I have ran several low pass filters, and this reduces the effect but does not get rid of the artifacts completely. Focal Statistics works well, but it really washes out/softens the Hillshade.

Any help on how to get rid of these or how to avoid the occurrence of them would be appreciated.

kru

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"Ah, to see the world with the eyes of the gods is geography--to know cities and tribes, mountains and rivers, earth and sea, this is our gift."
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#2
Mike Boruta

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Are you sure those artifacts are from the DEM? Have you projected the DEM prior to making the hillshade? I've seen the exact same thing when I've made a hillshade from a projected a DEM without changing the sampling technique to "bilinear." If this sounds possible, look here:

http://support.esri....l...how&d=29127

#3
razornole

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Hey Borga,

I'll bet you are right. I am 95% sure that it is projected, I'm pretty sure that I did that after I concatenated the tiles. When working with rasters should I always stay in GCS?

Thanks a lot,
kru
"Ah, to see the world with the eyes of the gods is geography--to know cities and tribes, mountains and rivers, earth and sea, this is our gift."
Strabo 22AD




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