shootingstar (#18) - How to convert cost results to distance in meters? (#229) - Message List

Some data has an extra attribute "length" in meter, but I guess this is not the case here, right?

If your length is the geometry length, then just do

SELECT length(transform(the_geom,<srid1>),<srid2>) ...

Wrapper functions usually return the_geom as well. srid2 should be one with a meter projection of course.