I am Digitizing road line in India using open layer plugin.When I calculate the length of line using field calculator it gives me the result in millimeter . I thought it is the projection problem and defined the projection as wgs 84 UTM 44N . The same problem exixts . but when I measure the line using measure line tool it gives the result in meters . What is the problem? I want the result to be in meters in field calculator itself.
You should look at what part of the system is calculating the length. If the layer / shapefile is producing the data, then it should be a UTM metres projection. If you are using the measure tool, the canvas CRS needs to be UTM metres projection.
Doing some work with 2.01 now, it seems there is a problem with field calculator and $length. There is not the same problem in 2.10
But I can't reproduce it with a blank shapefile....