GPS Dead Reckoning

[thelearner]

Hello,

I want a GPS module that can work indoor and outdoor also. Then i came up with dead reckoning type GPS modules, but there are many modules that support dead reckoning. So is there any parameter through which i can differentiate the performance of the dead reckoning of the modules.

TIA

Regards,
thelearner

[cdev]

There are a lot of papers on Google Scholar. Typically DR involves linking an IMU and possibly a digitak compasss to a high accuracy RTK gps. But the longer it is since you last GPS fix the residual error adds up. Still they can be fairly good. Most recently visual slam is incorporating visual clues in the solution. Extebnsive databases of landmarks can be built up in memory and SIFT used to determine from the environments geometry where a robot is. The science of indoor navigation and mapping is becoming better very quickly. The more imputs your robot has the better. RGBD sensors give you images plus depth. very useful.