[GRASS-dev] z-exag in wxnviz

[Hamish]

Helena wrote:
> - in wxnviz to avoid the very small zexag for latlong,

another idea for lat/lon z-exag: just figure out what is 20-25% of the canvas height (or ~15% of the north-south image width),
and work backwards from there, rounding to the nearest nice
round number.

I don't know if there is any real way to escape from x:y:z ratios
of 1 : 1 : 1/(1852*60), as anything other than that is numerically
synthetic. if taking up the 1:cos(lat) aspect ratio adjustment
perhaps rather than converting the elevation data to degrees,
we could convert the ew, ns to "meters" to get ratios of
1852*60*cos(lat): 1852*60 : 1 as the cheap and dirty projection.
for global lat/lon views you probably wouldn't want to do that
though.


Hamish