Rob Frohne wrote: > Hi Jeff, > > I am an amateur radio operator, and I am writing a little application to > display where the major lobe of my antenna is pointing. I can control the > direction of my antenna with the computer, and it would be nice to have a > display of the whole world, as well as circles representing how far the > station I am talking to is, and radial lines showing the bearings. I'd like > to show the bearings along the edge of the map. For this type of map, a > circle is a much better boundary than a square, but if it has to be a > square, we should be able to make it a square bounding the circle, not the > other way around. I think I can even plot the station's location given data > I get from the Internet using this software. I am just learning Python, but > it appears to be ideal for what I'm doing. > > Right now I'm trying to figure out how to get the Eclipse IDE I am trying > out to show me the source code for Basemap. :-) > > Thanks for the expert help! > > Rob >
Rob: I've updated basemap in SVN so that if neither a width/height or corner lat/lons are provided, the whole world is plotted in a circle with projection='aeqd'. If you can access SVN please try it out and let me know how it works for you. If not, I can provide you with a tarball. The full-disk aeqd will not work right now with ellipsoids, only for perfect spheres. Is that a problem for you? -Jeff > Jeff Whitaker wrote: > >> Rob Frohne wrote: >> >>> Hi, >>> >>> I think I am running into the same thing John is here. When you want to >>> display the whole earth in 'aeqd' mode, the projection needs to be onto a >>> circle. As it is, what is plotted is a square that just fits inside the >>> circle I want. Here is a link to a photo of the kind of projection I >>> want. >>> >>> http://www.wm7d.net/az_proj/images/lon_anim_shaded.gif >>> >>> Is there a way to get the whole earth plotted with 'aeqd'? >>> >>> >> Rob: No, you can't get the whole earth - the most you can get is the >> cube that fits within it. I can look into adding that functionality for >> the aeqd projection if there's a real use case. Note that there are >> other whole-earth projections available (mollweide, vandergrinten, >> robinson, sinuisoidal etc). These projections have much less distortion >> far away from the center of the map than the azimuthal equidistant >> does. Why do you want to use aeqd to plot the whole globe? >> >> -Jeff >> >>> Thanks, >>> >>> Rob >>> >>> >> >>> John [H2O] wrote: >>> >>> >>>> Hello, >>>> >>>> I'm creating a web application that will take user input from a >>>> javascript >>>> map to give me bounding coordinates (i.e. urcrnrlat, urcrnrlon, >>>> llcrnrlat, >>>> llcrnrlon) and possibly a switch for polar projection. Other than that I >>>> have no further information. Which projection is the most suitable to >>>> handle anything from a 'global' plot to a zoom say over a state? I don't >>>> see the zoom being too tight, but global projections are likely. I >>>> personally prefer Equal Area, hence right now I'm working with 'aeqd', >>>> but >>>> I seem to have problems if the plot is global with that projection. >>>> >>>> Just looking for advice, opinions, and ideally examples if anyone has >>>> created a similar function / module to use in a web environment. >>>> >>>> Thanks! >>>> -john >>>> >>>> >>>> >>> >>> >> -- >> 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 >> >> >> ------------------------------------------------------------------------------ >> _______________________________________________ >> Matplotlib-users mailing list >> Matplotlib-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/matplotlib-users >> >> >> > > ------------------------------------------------------------------------------ _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
