Have a look at https://www.ianturton.com/tutorials/bluemarble.html where I have example scripts and work flow to create a base image from a set of tiles and how to make a pyramid from it.
Ian On Tue, 21 May 2019 at 03:16, Barry Carter <geoserver-l...@barrycarter.info> wrote: > I'm trying to provide SRTM1 (1 arcsecond resolution elevation) images and > data > using GeoServer, but can't figure out how to serve such a large dataset > efficiently. Here's what I've done so far: > > - Downloaded the 1 degree squared HGT files. The Earth is 360*180 = > 64800 > square degrees, but only 14295 HGT files since the other square > degrees > are 100% water. The HGT files are uncompressed and 25,934,402 bytes > each. > > - I then used commands like: > > gdal_translate -co TILED=YES -co COMPRESS=DEFLATE N58W122.hgt > N58W122.hgt.tif > > to convert these HGT files into TIFFs. The TIFFs vary in size, but are much > smaller. > > - I then imported the directory with the TIFFs as a store using > ImageMosaic. This took a while, but appears to have worked, since > "srtm1" > (the name I gave it) now appears in my list of stores. > > - I then created a layer using this source, but when I use "OpenLayers" > preview, the server hangs for a while and ultimately dies with "too > many > open files" (or similar). This seems odd, since my Linux OS had > fs.file-max set to 13063650. I even tried doubling it to 26127300, but > that didn't help. > > At this point, I suspect I need to create an image pyramid or something so > GeoServer can handle the data efficiently, but I'm not sure exactly what to > do. I've used 'gdal_retile.py' previously to create pyramids from one large > image into tiles at various zoom levels, but I think I want to do the > opposite > here (merge smaller images for lower zoom levels). The gdal_retile.py > option > -pyramidsonly seems to say it does that, but I can't get it work (it just > hangs and creates no files) > > > > _______________________________________________ > Geoserver-users mailing list > > Please make sure you read the following two resources before posting to > this list: > - Earning your support instead of buying it, but Ian Turton: > http://www.ianturton.com/talks/foss4g.html#/ > - The GeoServer user list posting guidelines: > http://geoserver.org/comm/userlist-guidelines.html > > If you want to request a feature or an improvement, also see this: > https://github.com/geoserver/geoserver/wiki/Successfully-requesting-and-integrating-new-features-and-improvements-in-GeoServer > > > Geoserver-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/geoserver-users > -- Ian Turton
_______________________________________________ Geoserver-users mailing list Please make sure you read the following two resources before posting to this list: - Earning your support instead of buying it, but Ian Turton: http://www.ianturton.com/talks/foss4g.html#/ - The GeoServer user list posting guidelines: http://geoserver.org/comm/userlist-guidelines.html If you want to request a feature or an improvement, also see this: https://github.com/geoserver/geoserver/wiki/Successfully-requesting-and-integrating-new-features-and-improvements-in-GeoServer Geoserver-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geoserver-users
