[B]Activity:[/B] Create 3D reconstructions of geological outcrops. Using imagery from a DJI Phantom 4, and SfM-MVS algorithms. To orientate the SfM-MVS reconstruction I will use ground control points (GCPs). I require sub-meter accuracy to measure these GCPs. [B]Areas:[/B] Remote, places with no mobile or RTK networks. First project will be in southwest Tibet. [B]Question 1:[/B] Is a SBAS solution the best way to go (I do not need cm accuracy)? [B]Question 2:[/B] How can I find out the coverage of SBAS, India has GAGAN, does that cover Tibet? China also has SNAS, but is that functional? Where can I confirm the coverage before I find out in the field that I am not within range? Are there commercial SBAS that I can pay for that cover Tibet? [B]Question 3:[/B] What receiver do I look for? I believe that the Arrow 200 GNSS and the SXblue II+ GNSS receivers will do what I want? The Bad Elf GNSS Surveyor and Juniper Systems Geode are much cheaper, can they also work in Tibet? [B]Question 4:[/B] Is there a better (cheaper) solution that I am unaware of? [B]Question 5:[/B] How can I check if there is a RTK network available before I arrive to the field? I appreciate any help.
