I have a basemap figure where data is placed atop, which can be in any number of differing projections. However, when I plot a line over it using pyplot.plot, the line doesn’t show unless I’m using the cylindrical equidistant projection.
From what I gather this is a limitation of the plot command. Can anyone confirm this? Is this a limitation in that the ‘cyl’ projection is assumed by pyplot.plot?
I saw a post that mentioned that a projection kwarg would not be added to the plot command. Does this mean that the plot command will realize the projection of the gca basemap?
Bruce
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Bruce W. Ford
Bruce: Did you convert the coordinates of the data you're plotting with pyplot.plot to map projection coordinates (by passing the lat/lon values to the Basemap instance)?
-Jeff
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On 12/1/11 7:34 AM, Bruce Ford wrote:
I have a basemap figure where data is placed atop, which can be in any number of differing projections. However, when I plot a line over it using pyplot.plot, the line doesn't show unless I'm using the cylindrical equidistant projection.
From what I gather this is a limitation of the plot command. Can anyone confirm this? Is this a limitation in that the 'cyl' projection is assumed by pyplot.plot?
I saw a post that mentioned that a projection kwarg would not be added to the plot command. Does this mean that the plot command will realize the projection of the gca basemap?
Bruce
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Bruce W. Ford
Yes, as a matter of fact I create an identical basemap object as the plotted gridded data. And the lines (tropical cyclone tracks) plot fine as long as the projection is ‘cyl’.
Bruce
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Bruce W. Ford
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On Thu, Dec 1, 2011 at 12:35 PM, Jeff Whitaker <jswhit@…83…146…> wrote:
On 12/1/11 7:34 AM, Bruce Ford wrote:
I have a basemap figure where data is placed atop, which can be in any number of differing projections. However, when I plot a line over it using pyplot.plot, the line doesn’t show unless I’m using the cylindrical equidistant projection.
From what I gather this is a limitation of the plot command. Can anyone confirm this? Is this a limitation in that the ‘cyl’ projection is assumed by pyplot.plot?
I saw a post that mentioned that a projection kwarg would not be added to the plot command. Does this mean that the plot command will realize the projection of the gca basemap?
Bruce
Bruce W. Ford
Bruce: Did you convert the coordinates of the data you’re plotting with pyplot.plot to map projection coordinates (by passing the lat/lon values to the Basemap instance)?
-Jeff
Yes, as a matter of fact I create an identical basemap
object as the plotted gridded data. And the lines (tropical
cyclone tracks) plot fine as long as the projection is ‘cyl’.
Bruce
Bruce: Can you post a self-contained example?
-Jeff
···
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