I’d also give a LZ77-compressed GeoTIFF export a try for a Hillshade — should compress fairly well (around 40% in my tests). -- Shaun Walbridge GIS Developer c: 805.722.9025 t: @scw<http://twitter.com/scw> From: Jarlath O'Neil-Dunne <[log in to unmask]<mailto:[log in to unmask]>> Reply-To: Jarlath O'Neil-Dunne <[log in to unmask]<mailto:[log in to unmask]>> Date: Wednesday, March 25, 2015 at 3:49 PM To: "[log in to unmask]<mailto:[log in to unmask]>" <[log in to unmask]<mailto:[log in to unmask]>> Subject: Re: hillshade files 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 On Mar 25, 2015, at 3:39 PM, Christi Ludlow Townsend <[log in to unmask]<mailto:[log in to unmask]>> wrote: 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: [log in to unmask]<mailto:[log in to unmask]> Subject: Re: hillshade files To: [log in to unmask]<mailto:[log in to unmask]> 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 On Mar 25, 2015, at 3:14 PM, Christi Ludlow Townsend <[log in to unmask]<mailto:[log in to unmask]>> wrote: 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 ------------------------------------------------------------------------- This list (NEARC-L) is an unmoderated discussion list for all NEARC Users. If you no longer wish to receive e-mail from this list, you can remove yourself by going to http://listserv.uconn.edu/nearc-l.html. ------------------------------------------------------------------------- This list (NEARC-L) is an unmoderated discussion list for all NEARC Users. If you no longer wish to receive e-mail from this list, you can remove yourself by going to http://listserv.uconn.edu/nearc-l.html. ------------------------------------------------------------------------- This list (NEARC-L) is an unmoderated discussion list for all NEARC Users. If you no longer wish to receive e-mail from this list, you can remove yourself by going to http://listserv.uconn.edu/nearc-l.html. ------------------------------------------------------------------------- This list (NEARC-L) is an unmoderated discussion list for all NEARC Users. If you no longer wish to receive e-mail from this list, you can remove yourself by going to http://listserv.uconn.edu/nearc-l.html. ------------------------------------------------------------------------- This list (NEARC-L) is an unmoderated discussion list for all NEARC Users. If you no longer wish to receive e-mail from this list, you can remove yourself by going to http://listserv.uconn.edu/nearc-l.html.