Oblique section plot

The example to plot cross section with oblique direction.

figure(figsize=[1500,400],newfig=False)
fig,((ax1,ax2)) = subplots(1,2,position=[0,0.08,1,0.89])
f = addfile(r'H:\test\data\test.nc')
fn1 = addfile(r'H:\alldata\dixing/elev.0.5-deg.nc')
lev1 = f['level'][:]
lev2 = meteo.pressure_to_height_std(lev1)
lev2 = lev2[::-1]/1000

lon1 = 80
lon2 = 120
lat1 = 32
lat2 = 40
lon = lon1
lat_c = []
tdata = []
tdata_terrain = []
while lon<=lon2:
    lat = lat1+(lat2-lat1)*(lon-lon1)/(lon2-lon1)
    lat_c.append(lat)
    print lat
    tdata.append(f['w'][0,:,'%f'%lat,'%f'%lon])
    tdata_terrain.append(fn1['data']['%f'%lat,'%f'%lon])
    lon = lon+1

tdata_terrain=array(tdata_terrain)
tdata_terrain=tdata_terrain/1000.0
alldata=concatenate(tdata,axis=0)
alldata=reshape(alldata,(len(tdata),len(lev1)))
alldata=alldata.T
alldata = alldata[::-1,:]

axes(newaxes=False)
x=arange(lon1,lon2+1,1)
levs = arange(-0.2,0.22,0.02)
yaxis(tickin=False,tickfontsize=17)
xaxis(tickin=False,tickfontsize=17)
yaxis(location='right',tickin=True,tickfontsize=18)
layer = contourf(x,lev2,alldata,levs,cmap='BlRe')
fill_between(x,tdata_terrain,color='gray')
plot(x,tdata_terrain,color='k')
ylabel('Hight(km)',fontsize=18,bold=False)
xlabel('Longitude',fontsize=18)
ylim(lev2.min(),12.001)
colorbar(layer,aspect=25)

caxes(ax2)
axesm(newaxes=False,tickfontsize=17)
lat = [32, 40]
lon = [100, 120]
geoshow(lat, lon, size=2, color='b')
lchina = shaperead('D:/Temp/map/bou2_4p.shp')
geoshow(lchina,edgecolor='k',size=1)
xlim(70,140)
ylim(15,55)
antialias(True)

Plot oblique cross section in 3-D coordinate.

f = addfile(r'H:\test\data\test.nc')
fn1 = addfile(r'H:\alldata\dixing/elev.0.5-deg.nc')
lev1 = f['level'][:]
lev2 = meteo.pressure_to_height_std(lev1)
lev2 = lev2[::-1]/1000

lon1 = 80
lon2 = 120
lat1 = 32
lat2 = 40
lon = lon1
x = []
y = []
tdata = []
tdata_terrain = []
while lon<=lon2:
    lat = lat1+(lat2-lat1)*(lon-lon1)/(lon2-lon1)
    print lon
    tdata.append(f['w'][0,:,'%f'%lat,'%f'%lon])
    tdata_terrain.append(fn1['data']['%f'%lat,'%f'%lon])
    x.append(lon)
    y.append(lat)
    lon = lon+1

tdata_terrain=array(tdata_terrain)
tdata_terrain[tdata_terrain<0] = 0
tdata_terrain=tdata_terrain/1000.0

alldata=concatenate(tdata,axis=0)
alldata=reshape(alldata,(len(tdata),len(lev1)))
alldata=alldata.T
alldata = alldata[::-1,:]
x=array(x)
y=array(y)

ax = axes3d(position=[0.11, 0.11, 0.775, 0.815],tickfontsize=17,bbox=False)
levs = arange(-0.2,0.22,0.02)
china = shaperead('D:/Temp/map/china.shp')
world = shaperead('D:/Temp/map/country1.shp')
ax.plot_layer(china,edgecolor='gray')
ax.plot_layer(world,edgecolor='gray')
layer=ax.contourf(x,lev2,alldata,levs,zdir='xy',alpha=0.8,sepoint=[lon1,lat1,lon2,lat2],cmap='BlRe')
k =(lat2-lat1)/float((lon2-lon1))
y1=k*(x-lon1)+lat1
ax.plot(x,y1,tdata_terrain,'-k',linewidth=1)
ax.fill_between(x,tdata_terrain, zdir='xy',color='gray',y=y1)

xlim(70,140)
ylim(15,55)
zlim(0,12)
colorbar(layer,aspect=30)
ylabel('Latitude (degrees)',fontsize=17)
xlabel('Longitude (degrees)',fontsize=17)
zlabel(label='Altitude (km)',fontsize=17)
antialias(True)