On 1/20/11 2:31 PM, R. Mitra wrote: > Hi > I have a set of records with known lat long. I want to show the > concentration of the records with a contour diagram on a world map in > any projection. It cannot spill over to the oceans. I know I have to > use basemap. Is there a quick recipe somewhere I can follow to give > me a desired output. I have gone through earlier posts on this board > but cannot find the right one. Any pointers would be very helpful. > Many thanks. > Best > Mitra
Mitra: The basic procedure is this: 1) load you data into 2d numpy arrays (lats, lons, data). lats and lons must be in degrees (not radians). 2) create a Basemap instance (called "map") for the desired projection. 3) calculate the map projection coordinates of your grid with x,y = map(lons,lats) 4) contour your data with the contourf method (map.contourf). 5) draw coastlines with the coastlines method. 6) draw lat/lon lines with the drawparallels and drawmeridians methods. There are many examples of this in the basemap examples directory. -Jeff ------------------------------------------------------------------------------ Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)! Finally, a world-class log management solution at an even better price-free! Download using promo code Free_Logger_4_Dev2Dev. Offer expires February 28th, so secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsight-sfd2d _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
