[GRASSLIST:616] Re: scale bar

[Hamish]

> 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