When Pre-generated map areas are not enough, users can also create Custom map areas using a sideloaded TPK in a Mobile app while the device is offline. When a user defines a Custom map area, they can select any TPKs that has been loaded onto their device, or use the default basemap of the web map. When they download the map area, go offline and activate the map area, the selected TPK or basemap is used for that map area.

The spatial reference (projection) of the TPK must match the spatial reference of the basemap used in the web map.

In summary, users can create a Custom map area in a Mobile app that uses a TPK when:

•One or more TPKs have been sideloaded onto the device.

•A Custom Mobile app or VertiGIS Studio Go is on the device referencing a web map that matches the spatial reference of the TPKs.

•Custom map areas are created that use the TPKs.

•The device is offline.

•One of the map areas is activated.