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On 02/04/12 23:23, Jeff Whitaker wrote:
On 4/2/12 4:02 PM, Mathew Topper wrote:
On 02/04/12 19:09, Jeff Whitaker wrote:
Mat: I just updated git master to add the 'k_0' keyword when
using projection='tmerc'. This is the scaling factor along
the central meridian, and is needed to exactly match the UTM
definition. I also added a utmtest.py example, that shows how
to plot a UTM zone, and convert Basemap coordinates to UTM
Jeffrey S. Whitaker Phone : (303)497-6313
Meteorologist FAX : (303)497-6449
NOAA/OAR/PSD R/PSD1 Email : Jeffrey.S.Whitaker@...
325 Broadway Office : Skaggs Research Cntr 1D-113
Boulder, CO, USA 80303-3328 Web : http://tinyurl.com/5telg
Jeff, thanks again for all your help with this. I tried the
example and it works great. My only question would be how to get
the axis labels into meters rather than degrees. Any hints? I
have found the customticks.py example. Is that the best route to
Mat: Just use 'suppress_ticks=False' when creating the Basemap
instance, and you will get axis ticks in meters. If you want to
use a custom tick formatter, use the customticks.py example as a
Jeff, I wonder whether I could run this past you? Basically, I
believe the easting and northing grid lines are available just by
turning on the standard matplotlib grid, so therefore I'm assuming
that the easting and northing grid will be orthogonal throughout the
map - is that correct?
Assuming all is well with that then I need to add the correct offset
to the axes values, presumably by calculating the value, in meters,
of the origin. I'm guessing I will have to use a tick formatter
(like customticks.py) to do this or the map points will no longer be
on the map (if, for instance, I just changed the axes ranges).
Does that make sense to you?
Dr. Mathew Topper
Institute for Energy Systems
School of Engineering
The University of Edinburgh
The King’s Buildings
Edinburgh EH9 3JL
Tel: +44 (0)131 650 5570
School fax: +44 (0)131 650 6554 mathew.topper@... http://www.see.ed.ac.uk
The University of Edinburgh is a charitable body, registered in
Scotland, with registration number SC005336.