On Wed, Sep 28, 2011 at 16:39, Jeff Whitaker <jsw...@fastmail.fm> wrote: > On 9/28/11 2:19 PM, Isidora wrote: >> Hi Filipe, >> >> I have just seen your answers. I am trying to plot on a background GIF map, >> lines like the ones you can see in >> http://www.spc.noaa.gov/products/outlook/day1probotlk_2000_wind.gif. I can >> plot the lines as you see them in this link without a problem. However, >> because those lines are not closed polygons, the filling extends only to a >> straight line between first and last point of the curve. >> I want the filling to extend all the way to the border of United States. >> >> Since drawcountries() return a Collection of paths without any metadata >> identifying the country/countries been separated by it, I cannot use it to >> mask the area outside ofthe borders out. >> >> I'd appreciate any link/documentation I could read to help me resolve this >> issue. >> >> Thank you > Isidora > > Nobody has tried to do this (that I know of), so I can't point you to > anything specific. Did you see my message about creating a gridded > field (say 1's for points inside and 0's for points outside the region), > the calling contour to draw the line? You can use the is_land method to > determine if a point is over land or not, but there is not way to > determine whether a given point is inside a country. As you found out, > there is no metadata associated with the coastlines or political > boundary lines. > > The fillcontinents method returns a list matplotlib polygon instances > that represent the land areas. One of them is North America, and could > be used to clip your line segments - but there is no easy way to > determine which one it is. > > If you can find a shapefile that just contains a CONUS polygon, you > could use that I suppose.
I guess that Jeff suggestion of manipulation a shapefile might be the easiest way to do this, here is an example that might help you. http://www.geophysique.be/en/2011/01/27/matplotlib-basemap-tutorial-07-shapefiles-unleached/ -Filipe > -Jeff > > -- > Jeffrey S. Whitaker Phone : (303)497-6313 > Meteorologist FAX : (303)497-6449 > NOAA/OAR/PSD R/PSD1 Email : jeffrey.s.whita...@noaa.gov > 325 Broadway Office : Skaggs Research Cntr 1D-113 > Boulder, CO, USA 80303-3328 Web : http://tinyurl.com/5telg > > > ------------------------------------------------------------------------------ > All the data continuously generated in your IT infrastructure contains a > definitive record of customers, application performance, security > threats, fraudulent activity and more. Splunk takes this data and makes > sense of it. Business sense. IT sense. Common sense. > http://p.sf.net/sfu/splunk-d2dcopy1 > _______________________________________________ > Matplotlib-users mailing list > Matplotlib-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/matplotlib-users > ------------------------------------------------------------------------------ All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity and more. Splunk takes this data and makes sense of it. Business sense. IT sense. Common sense. http://p.sf.net/sfu/splunk-d2dcopy1 _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
