Hi, I'm not sure there is a function that can burns geometries on an existing raster.
So I guess you will need to create a raster for each "layer" you want to draw (e.g. the polygons, the boundaries...) and merge them into a final raster using st_mapalgebra. 2017-02-22 21:48 GMT+01:00 Olivier Leprêtre <o.lepre...@gmail.com>: > Hi, > > > > I'm trying to do a "screen copy" from a set of polygons. So I thought that > I could use St_AsRaster and St_AsJpeg as follow, with the selection of two > poly. > > > > SELECT ST_AsJPEG(ST_AsRaster(st_collect((Select geom from poly where > gid=605530),(Select geom from poly where gid=605533)),1000,1000, > ARRAY['8BUI', '8BUI', '8BUI'], ARRAY[255,255,255], > ARRAY[0,0,0],null,null,0,0,true)) > > > > I load the result in a C# app which is in charge to save it as a file. > This "works" but I'm loosing the boundaries (tha't to say the red lines in > the image below). > > > > 1) Is there a way to keep those boundaries ? > > 2) As I have other layers, like texts, will it be possible to make > them appear also, like a screen copy ? > > > > In other words, more simply, am I on the right way or should I think to a > completely different solution ? > > > > Thanks, > > > > Olivier > > > > > > ------------------------------ > [image: Avast logo] > <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> > > L'absence de virus dans ce courrier électronique a été vérifiée par le > logiciel antivirus Avast. > www.avast.com > <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> > > > _______________________________________________ > postgis-users mailing list > postgis-users@lists.osgeo.org > https://lists.osgeo.org/mailman/listinfo/postgis-users >
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