Created
November 2, 2013 19:36
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Example of spinning globe in Basemap/Matplotlib
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import numpy as np | |
import matplotlib.pyplot as plt | |
import matplotlib as mpl | |
import matplotlib.cm as cm | |
from mpl_toolkits.basemap import Basemap, shiftgrid | |
from matplotlib.backends import backend_agg as agg # raster backend | |
filename = 'vic_error_9p_1K.txt' | |
# Set up the color data | |
data = np.transpose(np.loadtxt(filename)) | |
lat = data[0] | |
lon = data[1] | |
min_error = data[2] | |
avg_error = data[3] # calculated wrong ... don't use. | |
max_error = data[4] | |
twenty = data[5] | |
ten = data[6] | |
five = data[7] | |
one = data[8] | |
array = np.empty((180,360)) | |
array[:] = np.NAN; | |
# x = np.arange(0.5, 360.5, 1.0) | |
# y = np.arange(-90.5, 89.5, 1.0) | |
# x,y = np.meshgrid(x,y) | |
# x,y = m(x,y) | |
for i in xrange(0, lat.size): | |
ilat = int(lat[i] + 90 - 0.5) | |
ilon = int(lon[i] - 0.5) | |
array[ilat,ilon] = five[i]*100 | |
array[array == 0] = np.NaN | |
array,lons = shiftgrid(180., array, np.arange(0,360), start=False) | |
#INSIDE LOOP... | |
for ll in xrange(-180,180): | |
# Set up the map | |
# lat_ts is the latitude of true scale. | |
# resolution = 'c' means use crude resolution coastlines. | |
# m = Basemap(projection='merc',llcrnrlat=-65,urcrnrlat=80,\ | |
# llcrnrlon=0,urcrnrlon=360,lat_ts=0,resolution='c') | |
m = Basemap(projection='ortho', lon_0=ll, lat_0=20, resolution='c') | |
m.shadedrelief(scale=0.1) | |
m.drawcoastlines(color='0.4') | |
m.drawcountries(color='0.4') | |
#m.fillcontinents(color='white',lake_color='gray') | |
m.drawparallels(np.arange(-90.,91.,30.)) | |
m.drawmeridians(np.arange(0., 360., 60.)) | |
m.drawmapboundary(fill_color='0.8') | |
nx = int((m.xmax-m.xmin)/50000.)+1; ny = int((m.ymax-m.ymin)/50000.)+1 | |
Tarray = m.transform_scalar(array, np.arange(-180,180), np.arange(-90,90), nx,ny) | |
#m.contourf(x, y, array, np.arange(-1.0, 1.05, 0.1), cmap=cm.jet_r) | |
m.imshow(Tarray,interpolation='nearest',vmin=0.0,vmax=5.0, cmap=cm.jet_r) | |
m.colorbar() | |
plt.savefig("figures/globeframes/frame{0}".format(str(ll+180).rjust(3, "0"))) | |
plt.clf() |
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what is "vic_error_9p_1K.txt"?