Selon Jukka Rahkonen <[email protected]>: > Hi, > > Is there a way to write several raster images into geospatial PDF so that > they > would appear as own selectable layers in the resulting PDF? With extra vector > layers it is possible be making a .vrt file combines the original layers into > one OGR_DATASOURCE. Does this work somehow also with raster sources and if it > does, could it be possible to see a simple example?
No, this isn't currently possible. You can merge several raster images into one single one before transforming to PDF, but that's not what you are looking for. There is also the possibility of inserting non-georeferenced images with the EXTRA_IMAGES option. That could be possibly used to add another georeferenced image if you manage to find the right offset values. There would be some difficulties in implementing a EXTRA_DATASETS option. Mainly to deal with possible different projections and/or different georeferenced extents. For example, when inputs are in different projections and/or have different extent, should they be reprojected/mosaiced to overlap on each other, with a common georeferencing, or should they be handled as map insets (a bit like Hawaï is represented in a USA map), each one with its own georeferencing info. Nothing that can't be solved, but would need some work. > > -Jukka Rahkonen- > > _______________________________________________ > gdal-dev mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/gdal-dev > _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
