The option to set geographic regions by specifying ISO country codes is awesome for getting a quick plot of a specific country or continent. Lets use Germany (DE) for this example.
Unfortunately there seems to be no way for an equally quick setting of the projection type. If I omit
-J and hope for the best
-JQ15c+ is automatically set in the background.
gmt coast -W -RDE+R10m -Ba -N1/1p,darkred -Saliceblue -pdf mapDE2
This is generally a nice thing but leads to severe distortions at the latitudes I’m interested in. So if I want a plot as Lambert Conic Conformal projection (
-JL) I still need to figure out my variables to populate
-JLlon0/lat0/lat1/lat2/width. I was just able to lazily say “give me a map of Germany” by using
-RDE but now I’m annoyed that I need to figure out the values for
gmt coast -W -RDE+R10m -JL10.5/51/49/53/17c -Ba -N1/1p,darkred -Saliceblue -pdf mapDE
I dream of something like
-JLwidth. Just give the desired type of projection and the desired width and GMT does the rest. Maybe not always perfect but for a quick and dirty map quite a useful feature. So what’s needed?
In my eyes this could be rather easily calculated from
lat0 are the middle of
lat2 are – for simplicity – 1/3 and 2/3 from the distance between highest and lowest latitude.
All my doc reading and experimentations lead nowhere. What do you think – might this be a good idea for a feature request? Maybe not only for
-JL but other projections as well?