Yes, you can then export it. IMAGINE (.img) is generally the most stable for large rasters in my experience.
—
Jarlath O’Neil-Dunne
University of Vermont | Spatial Analysis Lab
Jarlath,
Can I then export the hillshade as an actual file? I need to hand it off to a bunch of software developers who don't work with GIS.
Thanks!
Christi
Date: Wed, 25 Mar 2015 15:23:33 -0400
From:
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Subject: Re: hillshade files
To:
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I do large hillside from massive LiDAR datasets using the Image Analysis tools. Hillshade in less than a second and minimal storage space.
http://resources.arcgis.com/en/help/main/10.2/index.html#//009t0000007r000000
—
Jarlath O’Neil-Dunne
University of Vermont | Spatial Analysis Lab
Hi,
I am creating a global hillshade file from the GLSDEM. I've mosaiced the tiles into four hemisphere-wide rasters (16-bit signed integer). I am running each mosaic through the ESRI 10.2 Hillshade tool which outputs 8-bit unsigned files. There
are 2 issues:
1) The output files are still huge (20GB or something ridiculous). I have tried tif, jp2 and img but none of them help with file size.
2) I'd like to remove or make transparent the non-shaded areas. ESRI directions say to use a reclassify or extract by attribute to separate non-zero values. Thing is, most of the resulting hillshade pixel values are non-zero so not much area
would be made transparent by creating such a file.
Any ideas?
It seems that much of the support documentation assumes you want to use mosaic datasets which I cannot in this case.
Many thanks,
Christi
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