Interactively get readable(i.e. lng/lat) coordinates from a matplotlib basemap plot?
python,matplotlib,matplotlib-basemap
tcaswell pointed me in the exactly right direction: ax = plt.gca() def format_coord(x, y): return 'x=%.4f, y=%.4f'%(m(x, y, inverse = True)) ax.format_coord = format_coord This does what I wanted....
Basemap and numpy 2d array
python,numpy,matplotlib-basemap
width = 200 height = 300 lllon, lllat, urlon, urlat = -144.99499512, -59.95500183, -65.03500366, 60.00500107 dlon = (urlon-lllon) / width dLat = (urlat-lllat) / height baseArray = np.fromfunction(lambda y,x: (1000.0 / (width + height)) * (y+x), (height, width), dtype = float) lons = np.arange(lllon, urlon, dlon) lats = np.arange(lllat, urlat,...
White area on matplotlib plot with pygrib data between 359.5 and 360 degrees
python,matplotlib,matplotlib-basemap,grib,gfs
I solved it myself 2 months later: Matplotlib doesn't fill the area if your longitude range is from 0 to 359.75 because it ends there from matplotlibs point of view. I solved it by dividing up the data and then stacking it. selecteddata_all = data.select(name = "Temperature")[0] selecteddata1, lats1, lons1...
Show unique color for unique value
from matplotlib.colors import from_levels_and_colors cmap, norm = from_levels_and_colors([0,1,2,3],['red','green','blue']) plt.imshow(data, cmap=cmap, norm=norm) ...
Matplotlib is not recognizing the attribute set_xdata.
python,matplotlib,pyqt,matplotlib-basemap
As Joe Kington pointed out: plot returns a list of artists of which you want the first element: self.line = self.widget.canvas.ax.plot(self.ValueTotal,'r-')[0] So, taking the first list element, which is the actual line. A minimal example to replicate this behavior: l = plt.plot(range(3))[0] l.set_xdata(range(3, 6)) l = plt.plot(range(3)) l.set_xdata(range(3, 6)) The...
Changing image background colour in matplotlib Basemap ortho projection
python,matplotlib,matplotlib-basemap
You can do this using the following: import matplotlib import matplotlib.pyplot as plt from mpl_toolkits.basemap import Basemap import matplotlib.pyplot as plt matplotlib.use('Agg') fig = plt.figure() fig.patch.set_facecolor('blue') fig.patch.set_alpha(0.7) ax = fig.add_subplot(111) m = Basemap(projection='ortho',lat_0=0,lon_0=0,resolution='c',ax=ax) m.drawmapboundary(fill_color='black') m.drawcoastlines(linewidth=1.25, color='#006600') plt.savefig('Desktop/out.png',facecolor="red", edgecolor="blue") This creates a plot with blue...
Incorrect plotting of points in Basemap
python,matplotlib,matplotlib-basemap,basemap
Based on coordinates and example, maybe you need to change order in map. x, y = map(long_list[:5], lat_list[:5]) Because in geography latitude is Y-coordinate and longitude is X-coordinate....
Mask area outside of imported shapefile (basemap/matplotlib)
python,matplotlib,shapefile,esri,matplotlib-basemap
I think this article I just found could give you some help. But I am not sure it is a full answer. http://basemaptutorial.readthedocs.org/en/latest/clip.html...
Overlay coastlines on a matplotlib plot
python,matplotlib,matplotlib-basemap,map-projections
Try cartopy and its new epsg feature: projection = ccrs.epsg(32636) fig, ax = plt.subplots(figsize=(5, 5), subplot_kw=dict(projection=projection)) ax.coastlines(resolution='10m') Here is a notebook with an example: http://nbviewer.ipython.org/gist/ocefpaf/832cf7917c21da229564...
Pandas error with basemap/proj for map plotting
python,pandas,data-analysis,matplotlib-basemap,proj
This is resolved by changing m(cat_data.LONGITUDE, cat_data.LATITUDE) to m(cat_data.LONGITUDE.values, cat_data.LATITUDE.values), thanks to Alex Messina's finding. With a little further study of mine, pandas changed that Series data of DataFrame (derived from NDFrame) should be passed with .values to a Cython function like basemap/proj since v0.13.0 released on 31 Dec 2013...
Plotting 3D bars in Matplotlib
python,python-3.x,matplotlib,plot,matplotlib-basemap
This is probably not the best way to resolve this and if anyone has a better method please share. I've found that a very simple way to get around the polygons going over the bars and creating this offset look is to simply make the polygon collection have a high...
3D CartoPy similar to Matplotlib-Basemap
python-2.7,matplotlib,3d,matplotlib-basemap,cartopy
The basemap mpl3d is a pretty neat hack, but it hasn't been designed to function in the described way. As a result, you can't currently use the same technique for much other than simple coastlines. For example, filled continents just don't work AFAICT. That said, a similar hack is available...
Runtime error using python basemap and pyproj?
python,runtime-error,matplotlib-basemap
For whatever reason, Basemap.quiver doesn't like taking Pandas DataFrame columns after upgrading. I changed: gMap.quiver(AllPoints['lon'],AllPoints['lat']....) to: gMap.quiver(AllPoints['lon'].values,AllPoints['lat'].values....) and it works fine now.
Matplotlib Mollweide/Hammer projection: region of interest only
python,matplotlib,matplotlib-basemap,map-projections
From the documentation, both Hammer and Mollweide projections don't allow this as they print out entire world maps. Here's some code using Polyconic projection, but it is bounded by straight lines. The trick here is to define the corner longitude and latitudes on creation. from mpl_toolkits.basemap import Basemap import matplotlib.pyplot...
density plot on a sphere Python
python,matplotlib,matplotlib-basemap
If you subclass the Bloch class of QuTip, and alter the way it draws the sphere, you can draw density plots and keep all the other framework it creates. Taking the matplotlib surface_plot examples, and altering the Bloch class' plotting functions works. Putting it in your own subclass prevents you...
how to display a image over a map with imshow?
python,matplotlib,matplotlib-basemap
m.imshow(im, extent=extent, alpha=0.6) ...
How to create a reusable basemap
python,matplotlib,figure,matplotlib-basemap
Thanks to @JoeKington here and @EdSmith at How to superimpose figures in matplotlib, i was able to understand how to achieve what i wanted: reuse basemap objects and pass them around. I made it this way: Created a base_map.py that has two functions: plot() that create a map object and...
Basemap Heat error / empty map
python,data,matplotlib,matplotlib-basemap,imshow
I now understand. You are trying to combine answers you received from here-imshow and here-hexbin. Your problem boils down to the fact that you want to use your Basemap as the "canvas" on which you plot your 2D histogram. But instead of doing that, you are making a Basemap then...
decrease size of markers used in basemap and get fullscreen
python,matplotlib,matplotlib-basemap
Those are several questions and it would be better to split them up. In the mean time, Evan Mosseri already answered the question about the markersize. An alternative would be to simply use the dot-marker, as I'll show. He also showed how to maximize the figure, I'll use an alternative...
Import Basemap fails under Fedora 21
python,numpy,matplotlib,matplotlib-basemap,basemap
In Fedora 20, /usr/lib64/python2.7/site-packages/mpl_toolkits/basemap/pyproj.py had the line: pyproj_datadir = '/usr/share/basemap' In Fedora 21 the data directory has been changed to: pyproj_datadir = os.sep.join([os.path.dirname(__file__), 'data']) In Fedora 21, pyproj.py is looking for the data in /usr/lib64/python2.7/site-packages/mpl_toolkits/basemap/data, but the rpm packages for python-basemap-data and python-basemap-data-hires are still putting the proj data in...
Extract information from shapefile using Python
python-2.7,gis,shapefile,matplotlib-basemap
I was able to solve this by using basemap (which uses Pyshp): val = [] s = m.readshapefile('last_500','last_500') for shapedict in m.last_500_info: val.append(shapedict['fieldname']) print val ...
Changing Basemap projection causes data to disappear
python,matplotlib,matplotlib-basemap,basemap
I think you're forgetting the simplest line, however you haven't shown most of your code so it's hard to guess. i.e. map = Basemap(projection='cyl', lat_0 = lat_0, lon_0 = lon_0, llcrnrlon = llcrnrlon, llcrnrlat = llcrnrlat, urcrnrlat = urcrnrlat, urcrnrlon = urcrnrlon, area_thresh = 1000., resolution='l') #valid aproximate coordinates for...