[gdal-dev] New creation options in PDF driver

[Even Rouault]

Hi,

Just to notify you of new creation options that have been added in the PDF 
driver:

CLIPPING_EXTENT=xmin,ymin,xmax,ymax: Set the clipping extent for the main 
source dataset and for the optional extra rasters. The coordinates are 
expressed in the units of the SRS of the dataset. If not specified, the 
clipping extent is set to the extent of the main source dataset.
EXTRA_RASTERS=dataset_ids: Comma separated list of georeferenced rasters to 
insert into the page. Those rasters are displayed on top of the main source 
raster. They must be georeferenced in the same projection, and they will be 
clipped to CLIPPING_EXTENT if it is specified (otherwise to the extent of the 
main source raster). 
EXTRA_RASTERS_LAYER_NAME=dataset_names: Comma separated list of name for each 
raster specified in EXTRA_RASTERS. If specified, each extra raster will be be 
placed into a layer, named with the specified value, that can be toggled/un-
toggled in the "Layer tree" of the PDF reader. If not specified, all the extra 
rasters will be placed in the default layer.
OFF_LAYERS=names: Comma separated list of layer names that should be initially 
hidden. By default, all layers are visible. The layer names can come from 
LAYER_NAME (main raster layer name), EXTRA_RASTERS_LAYER_NAME, 
EXTRA_LAYER_NAME and OGR_DISPLAY_LAYER_NAMES. 
EXCLUSIVE_LAYERS=names: Comma separated list of layer names, such that only 
one of those layers can be visible at a time. This is the behaviour of radio-
buttons in a graphical user interface. he layer names can come from LAYER_NAME 
(main raster layer name), EXTRA_RASTERS_LAYER_NAME, EXTRA_LAYER_NAME and 
OGR_DISPLAY_LAYER_NAMES. 
Even
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