Hi people,
1 question ...
why grass 6.0 doesn`t display the scale bar in lat/long location? and how to do it?
thanx,
Riccardo
why grass 6.0 doesn`t display the scale bar in lat/long location?
because the display is unprojected Plate Carrée, 1deg lat to 1deg lon
square, and as the scale changes with cos(lat) a scale bar would only
make sense east-west.
e.g. at 45 lat 1 deg lon is 0.707 of the distance of 1 deg lat.
The scale would be wrong by 30% in the vertical.
and how to do it?
Use d.grid to put up lat/lon grid lines.
or project into something like UTM then overlay a scale and geogrid with
d.grid (GRASS 6.1-cvs).
Hamish