topic Re: Elevation NED30m extract in Elevation Data Questions

Elevation NED30m extract

Anonymous User — Sat, 11 Feb 2017 20:05:58 GMT

I am trying to use the Ground Surface Elevation 30m (href="http://goto.arcgisonline.com/elevation/NED30m) data to do some local processing. I wanted to extract an area and then work with it. But no matter what I do the raster calculator fails with nothing in the output raster. I have checked my environments, I am using a mask, projections are all the same, etc. It takes about an hour to finish (odd I think), the area is less than 50 miles square - this should be a simple process, but after 5 tries I am ready to abandon and just download the data and use it.

I am working in ArcMap 10.5, using Spatial Analyst and all Esri tools.

Any recommendations?

Lorri

Re: Elevation NED30m extract

DanPatterson_Retired — Sat, 11 Feb 2017 21:33:47 GMT

try the original sources would be my suggestion. The two comments seem to suggest that you may be experiencing a similar fate

Re: Elevation NED30m extract

AbdullahAnter — Sun, 12 Feb 2017 04:10:57 GMT

Are you sure that there are areas equal 30m?

maybe 30.1/ 29.9/30.08 ...etc. Do you want over 30 m or equal?

try use Extract by Attributes tool Extract by Attributes—Help | ArcGIS Desktop rather that raster calculator.

try to do mask the output in environment, but let the tool run then use Extract by Mask Extract by Mask—Help | ArcGIS Desktop .

I hope this be helpful.

Re: Elevation NED30m extract

DanPatterson_Retired — Sun, 12 Feb 2017 13:52:38 GMT

If I am not mistaken, it is the source of the data from ArcGIS Online that is the problem. The original sources may be a better option since there are fewer restrictions on its use

Re: Elevation NED30m extract

AbdullahAnter — Sun, 12 Feb 2017 16:23:22 GMT

but after 5 tries I am ready to abandon and just download the data and use it.

I am working in ArcMap 10.5, using Spatial Analyst and all Esri tools.

Any recommendations?
Lorri

So I think she can use Arc Map Desktop.

Re: Elevation NED30m extract

DanPatterson_Retired — Sun, 12 Feb 2017 16:37:19 GMT

That is good... because, it would be best to download the data from the original source and use it since the source being used isn't the original

Re: Elevation NED30m extract

Anonymous User — Sun, 12 Feb 2017 21:46:45 GMT

I just downloaded the data for the quads I needed and processed this successfully. I agree that it seems the data on AGOL was not functioning as expected.