This is ticket #826 http://trac.osgeo.org/postgis/ticket/826
Pierre > -----Original Message----- > From: postgis-users-boun...@postgis.refractions.net [mailto:postgis-users- > boun...@postgis.refractions.net] On Behalf Of Jakub Hettler > Sent: Monday, August 27, 2012 10:51 AM > To: PostGIS Users Discussion > Subject: Re: [postgis-users] irregular tiling with raster2pgsql - imported > raster > has nodata value on the edge > > Hi Bborie, > I think, that not all rasters are divisible without remainder (except 1x1 > tile) :) > > My problem is this (this is my raster after raster2psql displayed with tiles) > > http://sdrv.ms/OjbhoD > > I need to cut the last tiles on the east and south a make it smaller by the > red line > > But I think it is impossible now, but i will find the solution :) > > I think about the function which will find the line of nodata value and then I > make the polygon and intersect it with this polygon. :D > > But if I understand it, if I cut last tiles and these will be smaller than > others, I > wont be able to load this raster into QGIS (PostGIS raster driver) > > Thanks > > Jakub > > > > > > > 2012/8/26 Bborie Park <bkp...@ucdavis.edu> > > > Currently, that behavior is as expected due to the application of the > specified tile size from the upper-left corner. To minimize the tiles > with large swaths of NODATA, you should try to use a tile size that is > cleanly divisible (no remainder) by the raster's width and height or a > size with a large remainder. I usually recommend tile sizes of > 100x100 or smaller though sizes around 50x50 are even faster. In > terms of performance, the smaller the time size, the better the > performance. > > -bborie > > > On Sun, Aug 26, 2012 at 10:22 AM, Jakub Hettler > <jakub.hett...@gmail.com> wrote: > > Hi all, > > I would like to ask if there is a way how to import tiled raster into > > PostGIS through raster2pgsql, but I need to make tiled raster, say > 256x256, > > but at the end of raster I have last tiles (on the east and south > side) > > which is on half out of the original raster (raster ends fe in the > middle > of > > last tile). If I try to load imported raster into QGIS or use > gdal_translate > > I have nodata value on this place in the raster. Is there a way how to > > import the raster with the smaller last tiles on the east and south > edges? > > > > Thanks > > > > Jakub > > > > > _______________________________________________ > > postgis-users mailing list > > postgis-users@postgis.refractions.net > > http://postgis.refractions.net/mailman/listinfo/postgis-users > > > > > > > -- > Bborie Park > Programmer > Center for Vectorborne Diseases > UC Davis > 530-752-8380 > bkp...@ucdavis.edu > > _______________________________________________ > postgis-users mailing list > postgis-users@postgis.refractions.net > http://postgis.refractions.net/mailman/listinfo/postgis-users > > _______________________________________________ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
