Problem in getting correct position of marker

[amar-crypto]

The marker is not giving the correct position. Suppose if the robot is on road, the marker shows somewhere right or left to the actual position. I entered the gps coordinates on the googlemaps and it shows the correct position. How to solve this problem?

[amar-crypto]

I want to use config_tile source as local. So, for this what to download from internet for the local path.

[sylvainar]

Your position should be in Decimal Degrees (https://www.gps-coordinates.net/gps-coordinates-converter)
For the download refer to #3