I'm trying to measure the distance between some coordinate points along a road line from an OpenStreetMap source map, I am using QGIS 2.4.0.
My problem is to find a way to measure these distances between points on a irregular line like a road with some precision.
I got some points from a GPS took along some of the roads to verify if the precision is acceptable and help with the measurements. Also I have a table with another points in kilometers without coordinates system reference and I have to create a relation between all these points to relate the distance.
I was able to find some tools that give me a measurement in a straight line and It bring me a lot of imprecisions with kilometer points.