> From: Jukka Rahkonen [mailto:[email protected]] > Paul Norman wrote: > > I'm looking for a way to display a large GeoTIFF or MrSID in JOSM as a > TMS > > or WMS layer, but am running into a scaling issue with my normal > method. > I > > received a 9 GB MrSID file from the city which turns into a 166 GB > > GeoTIFF, covering a large area at a 10cm resolution. > > > > > > My second method for imagery is to use mapserver to serve it up as a > > WMS > layer. That didn't work, mapserver never responded when trying to handle > such a large file. I think it just took too long to process anything > with > > it. > > > > Does anyone have any suggestions for alternative methods that will > > work > better for large files? Ideally I'd like to do a tms slippymap but I'm > open > > to anything > > Mapserver should handle the case. I would use the original MrSID as a > source, it should work out-of-the-box. If converted to GeoTIFF first, be > sure to create a tiled tiff (-co TILED=YES) and then create overview > layers with gdaladdo. If you still have troubles send mail to Mapserver- > users mailing list and you will be helped.
Thanks for the help. Creating a tiled tiff then adding overviews worked. I tried using the MrSID, but was faced by issues compiling gdal to support the format as LizardTech released v8 of their DSDK which has some issues with gdal. See http://trac.osgeo.org/gdal/ticket/3910 Since I'm hoping to get the next city's orthography as a MrSID, I may end up looking at the problem again. _______________________________________________ dev mailing list [email protected] http://lists.openstreetmap.org/listinfo/dev
