Hello all, I have been doing some experimenting with using GeoPDFs in field maps but have hit a snag. I make a make a PDF map of an area, ensuring it is set to GeoPDF and make sure the coordinate system of the map is set to WGS 1984 Web Mercator (auxiliary sphere) WKID 3857. Once exported, I upload the PDF to ArcGIS Online and went through the steps in this document to set it up for offline use https://www.esri.com/arcgis-blog/products/field-maps/field-mobility/add-geospatial-pdfs-to-your-field-maps-workflows. From there I make an offline area; When I go into the map within Field Maps and make an offline area on the device, the app/ map will use the PDF as the basemap and the PDF works as expected.
However, the issue comes in when I try to set up a pre-determined offline area in the Field Maps Designer through AGOL. I am able to create the area without issue, but when I download the area, I am expected the map to use the PDF, but I get an error saying " Basemap Incompatible", referencing the conflict of projections and it reverts back to the default map.
Looking into this deeper, I pulled the PDF into a new map in Pro and checked the coordinate system, finding the projection had changed from saying the full "WGS 1984 Web Mercator (auxiliary sphere)" with WKID 3857 to "WGS_1984_Web_Mercator" with WKID 3785, which may be causing the incompatibility error (screenshots below).
Coordinate settings on a new map after GeoPDF is brought in as the only layer:
Coordinate settings of the map used to create the PDF:
Has anyone else ran into this kind of issue or know a work around? In my case, I'm looking into making the PDFs as a lighter load basemap alternative for my users, who operate in low connectivity areas, and it is common for us to make the operational areas on the backend and tell them "press this to download what you need offline" rather than have them go through trying to make their own areas. Thanks!
