We have build a setup Wavecom+C-GPS+PC, and try to study Wavecom for navigational purposes. There is something VERY strange with measurements of coordinate. Position reported by Wavecom is always about 500m away from real position when we drive a car. We basically user slightly modified version of QuerryApp. (We read NMEA string and convert it to get coordinates)
We are probably doing something wrong. Any hints where to look? Also could someone please comment on their precision measurements.