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Get_grid.py
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import numpy as np; import pyroms; from netCDF4 import Dataset; from mpl_toolkits.basemap import pyproj; from functions import point_inside_polygon
from Grid_VALID import Grid_VALID
#poly=[(51.006,2.426),(51.687,4.176),(52.750,3.073),(52.081,1.336)]
#poly_parent=[(49.561,0.490),(51.707,5.956),(54.141,3.330),(52.083,-2.088)]
poly=[(50.531,1.7312),(51.4691,3.7075),(52.5049,2.4314),(51.5905,0.4607)]
poly_parent=[(48.5,-0.4),(51.9,6.7),(54.9,2.8),(51.7,-4.3)]
def Get_grid_ODYSSEA_Nest(grdfile, name='ODYSSEA_NEST'):
nc = Dataset(grdfile)
#lon = nc.variables['lon'][81:148]; lat = nc.variables['lat'][34:75]; var = nc.variables['analysed_sst'][0,34:75,81:148]
lon = nc.variables['lon'][:]; lat = nc.variables['lat'][:]; var = nc.variables['analysed_sst'][0,:,:]
nc.close()
lon,lat=np.meshgrid(lon,lat)
lon_t = lon[:,:]
lat_t = lat[:,:]
lon_vert = 0.5 * (lon[:,1:] + lon[:,:-1])
lon_vert = 0.5 * (lon_vert[1:,:] + lon_vert[:-1,:])
lat_vert = 0.5 * (lat[1:,:] + lat[:-1,:])
lat_vert = 0.5 * (lat_vert[:,1:] + lat_vert[:,:-1])
#mask_t = np.ones((len(var[:,0]), len(var[0,:])))
a=np.ones((len(var),len(var.T)))
a[var.mask==True]=0
#print a
mask_t=a
#mask correction
for i in range(len(var)):
for j in range(len(var.T)):
if point_inside_polygon(lat[i,j],lon[i,j],poly)==False:
mask_t[i,j]=0
z_t = 1; h=1
geod = pyproj.Geod(ellps='WGS84')
az_forward, az_back, dx = geod.inv(lon_vert[:,:-1], lat_vert[:,:-1], lon_vert[:,1:], lat_vert[:,1:])
angle = 0.5 * (az_forward[1:,:] + az_forward[:-1,:])
angle = (90 - angle) * np.pi/180.
return Grid_VALID(lon_t, lat_t, lon_vert, lat_vert, mask_t, z_t, h, angle, name)
def Get_grid_Mercator_Nest(grdfile, name='MERCATOR_NEST'):
nc = Dataset(grdfile)
#lon = nc.variables['lon'][52:78]; lat = nc.variables['lat'][39:65]; var = nc.variables['votemper'][0,0,39:65,52:78]#; depth = nc.variables['depth'][:]
lon = nc.variables['lon'][22:93]; lat = nc.variables['lat'][18:86]; var = nc.variables['votemper'][0,0,18:86,22:93]
print np.shape(lon),np.shape(lat), np.shape(var)
nc.close()
lon,lat=np.meshgrid(lon,lat)
lon_t = lon[:,:]
lat_t = lat[:,:]
lon_vert = 0.5 * (lon[:,1:] + lon[:,:-1])
lon_vert = 0.5 * (lon_vert[1:,:] + lon_vert[:-1,:])
lat_vert = 0.5 * (lat[1:,:] + lat[:-1,:])
lat_vert = 0.5 * (lat_vert[:,1:] + lat_vert[:,:-1])
#mask_t = np.array(~var[:].mask, dtype='int')
a=np.ones((len(var),len(var.T)))
a[var.mask==True]=0
#print a
mask_t=a
#mask correction
for i in range(len(var)):
for j in range(len(var.T)):
if point_inside_polygon(lat[i,j],lon[i,j],poly)==False:
mask_t[i,j]=0
#z_t = np.tile(depth,(mask_t.shape[2],mask_t.shape[1],1)).T
#depth_bnds = np.zeros(len(depth)+1)
#for i in range(1,len(depth)):
# depth_bnds[i] = 0.5 * (depth[i-1] + depth[i])
#depth_bnds[-1] = 1000
#bottom = pyroms.utility.get_bottom(var[::-1,:,:], mask_t[0], spval=var.fill_value)
#nlev = len(depth)
#bottom = (nlev-1) - bottom
#h = np.zeros(mask_t[0,:].shape)
#for i in range(mask_t[0,:].shape[1]):
# for j in range(mask_t[0,:].shape[0]):
# if mask_t[0,j,i] == 1:
# h[j,i] = depth_bnds[bottom[j,i]+1]
z_t = 1; h=1
geod = pyproj.Geod(ellps='WGS84')
az_forward, az_back, dx = geod.inv(lon_vert[:,:-1], lat_vert[:,:-1], lon_vert[:,1:], lat_vert[:,1:])
angle = 0.5 * (az_forward[1:,:] + az_forward[:-1,:])
angle = (90 - angle) * np.pi/180.
return Grid_VALID(lon_t, lat_t, lon_vert, lat_vert, mask_t, z_t, h, angle, name)
def Get_grid_ODYSSEA_Parent(grdfile, name='ODYSSEA_PARENT'):
nc = Dataset(grdfile)
lon = nc.variables['lon'][:]; lat = nc.variables['lat'][:]; var = nc.variables['analysed_sst'][0,:,:]
nc.close()
lon,lat=np.meshgrid(lon,lat)
lon_t = lon[:,:]
lat_t = lat[:,:]
lon_vert = 0.5 * (lon[:,1:] + lon[:,:-1])
lon_vert = 0.5 * (lon_vert[1:,:] + lon_vert[:-1,:])
lat_vert = 0.5 * (lat[1:,:] + lat[:-1,:])
lat_vert = 0.5 * (lat_vert[:,1:] + lat_vert[:,:-1])
a=np.ones((len(var),len(var.T)))
a[var.mask==True]=0
mask_t=a
for i in range(len(var)):
for j in range(len(var.T)):
if point_inside_polygon(lat[i,j],lon[i,j],poly)==False:
#if point_inside_polygon(lat[i,j],lon[i,j],poly_parent)==False:
mask_t[i,j]=0
z_t = 1; h=1
geod = pyproj.Geod(ellps='WGS84')
az_forward, az_back, dx = geod.inv(lon_vert[:,:-1], lat_vert[:,:-1], lon_vert[:,1:], lat_vert[:,1:])
angle = 0.5 * (az_forward[1:,:] + az_forward[:-1,:])
angle = (90 - angle) * np.pi/180.
return Grid_VALID(lon_t, lat_t, lon_vert, lat_vert, mask_t, z_t, h, angle, name)
def Get_grid_Mercator_Parent(grdfile, name='MERCATOR_PARENT'):
nc = Dataset(grdfile)
lon = nc.variables['lon'][22:93]; lat = nc.variables['lat'][18:86]; var = nc.variables['votemper'][0,0,18:86,22:93]#; depth = nc.variables['depth'][:]
#lon = nc.variables['lon'][:]; lat = nc.variables['lat'][:]; var = nc.variables['votemper'][0,0,:,:]#; depth = nc.variables['depth'][:]
print np.shape(lon),np.shape(lat), np.shape(var)
nc.close()
lon,lat=np.meshgrid(lon,lat)
lon_t = lon[:,:]
lat_t = lat[:,:]
lon_vert = 0.5 * (lon[:,1:] + lon[:,:-1])
lon_vert = 0.5 * (lon_vert[1:,:] + lon_vert[:-1,:])
lat_vert = 0.5 * (lat[1:,:] + lat[:-1,:])
lat_vert = 0.5 * (lat_vert[:,1:] + lat_vert[:,:-1])
a=np.ones((len(var),len(var.T)))
a[var.mask==True]=0
mask_t=a
for i in range(len(var)):
for j in range(len(var.T)):
if point_inside_polygon(lat[i,j],lon[i,j],poly)==False:
#if point_inside_polygon(lat[i,j],lon[i,j],poly_parent)==False:
mask_t[i,j]=0
z_t = 1; h=1
geod = pyproj.Geod(ellps='WGS84')
az_forward, az_back, dx = geod.inv(lon_vert[:,:-1], lat_vert[:,:-1], lon_vert[:,1:], lat_vert[:,1:])
angle = 0.5 * (az_forward[1:,:] + az_forward[:-1,:])
angle = (90 - angle) * np.pi/180.
return Grid_VALID(lon_t, lat_t, lon_vert, lat_vert, mask_t, z_t, h, angle, name)