Revision: 6507
http://matplotlib.svn.sourceforge.net/matplotlib/?rev=6507&view=rev
Author: jswhit
Date: 2008-12-08 12:44:41 +0000 (Mon, 08 Dec 2008)
Log Message:
-----------
now can specify just lon_0 to define global cylindrical projection
centered on lon_0.
Modified Paths:
--------------
trunk/toolkits/basemap/Changelog
trunk/toolkits/basemap/lib/mpl_toolkits/basemap/__init__.py
Modified: trunk/toolkits/basemap/Changelog
===================================================================
--- trunk/toolkits/basemap/Changelog 2008-12-08 12:31:06 UTC (rev 6506)
+++ trunk/toolkits/basemap/Changelog 2008-12-08 12:44:41 UTC (rev 6507)
@@ -1,4 +1,6 @@
version 0.99.2 (not yet released)
+ * Now can specify just lon_0 for all cylindrical projections
+ (to produce global map centered on lon_0).
* Added save_background.py example, showing how to re-use
a map background without redrawing coastlines.
* Added embedding_map_in_wx.py example (courtesy of
Modified: trunk/toolkits/basemap/lib/mpl_toolkits/basemap/__init__.py
===================================================================
--- trunk/toolkits/basemap/lib/mpl_toolkits/basemap/__init__.py 2008-12-08
12:31:06 UTC (rev 6506)
+++ trunk/toolkits/basemap/lib/mpl_toolkits/basemap/__init__.py 2008-12-08
12:44:41 UTC (rev 6507)
@@ -261,8 +261,9 @@
================ ====================================================
Keyword Description
================ ====================================================
- lat_ts latitude of true scale for mercator projection,
+ lat_ts latitude of true scale.
optional for stereographic projection.
+ mandatory for mercator projection.
lat_1 first standard parallel for lambert conformal,
albers equal area and equidistant conic.
Latitude of one of the two points on the projection
@@ -532,24 +533,6 @@
llcrnrlon,llcrnrlat,urcrnrlon,urcrnrlat =
_choosecorners(width,height,**projparams)
self.llcrnrlon = llcrnrlon; self.llcrnrlat = llcrnrlat
self.urcrnrlon = urcrnrlon; self.urcrnrlat = urcrnrlat
- elif projection == 'merc':
- if lat_ts is None:
- raise ValueError, 'must specify lat_ts for Mercator basemap'
- # clip plot region to be within -89.99S to 89.99N
- # (mercator is singular at poles)
- if not using_corners:
- llcrnrlon = -180.
- llcrnrlat = -90.
- urcrnrlon = 180
- urcrnrlat = 90.
- if llcrnrlat < -89.99: llcrnrlat = -89.99
- if llcrnrlat > 89.99: llcrnrlat = 89.99
- if urcrnrlat < -89.99: urcrnrlat = -89.99
- if urcrnrlat > 89.99: urcrnrlat = 89.99
- self.llcrnrlon = llcrnrlon; self.llcrnrlat = llcrnrlat
- self.urcrnrlon = urcrnrlon; self.urcrnrlat = urcrnrlat
- if width is not None or height is not None:
- print 'warning: width and height keywords ignored for %s
projection' % _projnames[self.projection]
elif projection in ['tmerc','gnom','cass','poly'] :
if projection == 'gnom' and not projparams.has_key('R'):
raise ValueError, 'gnomonic projection only works for perfect
spheres - not ellipsoids'
@@ -640,26 +623,29 @@
llcrnrlon,llcrnrlat,urcrnrlon,urcrnrlat =
_choosecorners(width,height,**projparams)
self.llcrnrlon = llcrnrlon; self.llcrnrlat = llcrnrlat
self.urcrnrlon = urcrnrlon; self.urcrnrlat = urcrnrlat
- elif projection in ['mill','gall']:
+ elif projection in _cylproj:
if not using_corners:
- llcrnrlon = -180.
llcrnrlat = -90.
- urcrnrlon = 180
urcrnrlat = 90.
+ if lon_0 is not None:
+ llcrnrlon = lon_0-180.
+ urcrnrlon = lon_0+180.
+ else:
+ llcrnrlon = -180.
+ urcrnrlon = 180
+ if projection == 'merc':
+ if lat_ts is None:
+ raise ValueError, 'must specify lat_ts for Mercator
basemap'
+ # clip plot region to be within -89.99S to 89.99N
+ # (mercator is singular at poles)
+ if llcrnrlat < -89.99: llcrnrlat = -89.99
+ if llcrnrlat > 89.99: llcrnrlat = 89.99
+ if urcrnrlat < -89.99: urcrnrlat = -89.99
+ if urcrnrlat > 89.99: urcrnrlat = 89.99
self.llcrnrlon = llcrnrlon; self.llcrnrlat = llcrnrlat
self.urcrnrlon = urcrnrlon; self.urcrnrlat = urcrnrlat
if width is not None or height is not None:
print 'warning: width and height keywords ignored for %s
projection' % _projnames[self.projection]
- elif projection == 'cyl':
- if not using_corners:
- llcrnrlon = -180.
- llcrnrlat = -90.
- urcrnrlon = 180
- urcrnrlat = 90.
- self.llcrnrlon = llcrnrlon; self.llcrnrlat = llcrnrlat
- self.urcrnrlon = urcrnrlon; self.urcrnrlat = urcrnrlat
- if width is not None or height is not None:
- print 'warning: width and height keywords ignored for %s
projection' % _projnames[self.projection]
else:
raise ValueError(_unsupported_projection % projection)
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