Re: How can you tell if a PDF file is a georeferenced geopdf?

On Tue, 9th Jul 2024 04:31:28 +0200, Enrico Papaloma wrote:

If you have a PDF of any topographic or park map, how can you tell, with
Windows or Android mapping tools, if the map is a georeferenced geoPDF?

By looking for coordinate reference system (CRS) information inside it.

GUI solution with QGIS (https://www.qgis.org):
* select the Pdf file in question inside the QGIS file browser
* open the Pdf file as if it were a folder by clicking on the triangle
  symbol, which is shown in front of the file name
* you should see either pages or layers of that Pdf as separate entries
  (at least one)
* right click on one of these pages/layers and select "Properties"
* look, whether a the property sheet contains any valid CRS information

Command line solution with GDAL (https://gdal.org/download.html):
gdalinfo example.pdf | find "CRS["

If this command returns empty, no CRS information has been found.

HTH.
Bernd
(F-Up set to sgs-n)