[GRASS-user] Scalebar for lon/lat projection in ps.map

[Glynn Clements]

maning sambale wrote:

> I am preparing a country-wide map using ps.map.  The region spans 2-3
> UTM zones although most of the region is covered by one zone but I
> still need the data at the fringes covered in another zone.  In order
> to do that I used a lon/lat projection.  However, ps.map will not
> produce a scalebar for lon/lat projection for good reasons.
> 
> I know this isn't good practice.  Any Ideas how I can produce a
> "scalebar" for lon/lat?

You could change the projection to Plate Carée (aka Equidistant
Cylindrical), which is essentially just lat/lon with scale factors.

Also, there's no fundamental reason why you can't use UTM for data
which doesn't fit within a single zone (obviously, if you have data in
other UTM zones, you'll have to reproject it, but that's no worse than
reprojecting to lat/lon).

-- 
Glynn Clements <glynn at gclements.plus.com>