I'm planning on purchasing a new tablet to field test collector and looking for recommendations on Apple vs Android, and how much memory is needed to work off-line in the field. Thanks, Sara
We did a similar exercise a while back... We ended up settling on iPads for now for the following reasons:
These might not all apply in your case, and the fact is this is all changing really quickly. We are starting to see more Android tablets with internal memory instead of SD card expansion, and Google is doing what it can to address the OS update issues. For now, for us, iPads in Lifeproof cases are where it's at for field work.
As far as the required memory - this will depend on what and how you are collecting. We do offline collection and tend to have lots of attached photos, so we are regularly dealing with large TPK files and large .geodatabase files on the devices. It isn't uncommon to have a TPK file in the 3-6GB range, and we frequently have multiple versions for a project (topo, imagery, streetmap, etc...). Photo attachments are an issue as well, with full size pictures from a tablet camera coming in at 5-8MB each. Multiply that times 20-50 pictures per day on some of our projects and the database can get really large fast.