We need to develop a process for explicitly caching tiles on the Android client so users can prepare their application while online and travel to the field.

• Implicit caching - If you open an area while online, the area at that zoom level will be cached in your device. If you revisit that area while offline, you can see it
• Explicit caching - the client app tells Mapbox SDK the style to use, the coordinates(polygon) and zoom levels to cache for offline

Workflow

Below is a list of steps the user will go through:

• Make sure they are connected to the internet
• Log in
• Sync

For implicit caching, user must continue to do the following.

• Confirm the operational areas that are assigned to team show up
• For each operational area the team is visiting that day OR for the next x days before they will have internet connectivity again:
  • Select the operational area and the plan associated
  • Load the imagery layer at the zoom level needed. 
  • Pan across the area at the lowest zoom level