Does ArcGIS Mobile support differential GPS?
Yes, both the ArcGIS Mobile application and the SDK runtime support real-time differential GPS (RT-DGPS). The GPS connection reads NMEA protocol, which contains positional information (including the geographic coordinate), and associated metadata details the type and quality of the position. The majority of GPS devices on the market today support RT-DGPS using Satellite-Based Augmentation Systems (SBAS) such as the North American Wide Area Augmentation System (WAAS) or the European Geostationary Navigation Overlay Service (EGNOS). SBASs are satellite systems for delivering RT-DGPS corrections to each GPS receiver using the same signal as the existing GPS system. GPS receivers using these systems can increase their accuracy dramatically. To understand the expected accuracy of a particular GPS receiver, it is important to read the specification provided by the manufacturer and also to run your own local tests to characterize performance in your environmental conditions. Environmental con
