wradlib Documentation - Bitbucket

wradlib Documentation, Release 0.1.1
latitude coordinates based on WGS84
lonc : array of floats
longitude coordinates based on WGS84
projstr : string
proj.4 projection string. Can be conveniently created by using function
wradlib.georef.create_projstr
Returns output : a tuple of 2 arrays (x and y coordinates)
Examples
Gauss-Krueger Zone 2: “+proj=tmerc +lat_0=0 +lon_0=6 +k=1 +x_0=2500000 +y_0=0 +ellps=bessel
+towgs84=598.1,73.7,418.2,0.202,0.045,-2.455,6.7 +units=m +no_defs”
Gauss-Krueger Zone 3: “+proj=tmerc +lat_0=0 +lon_0=9 +k=1 +x_0=3500000 +y_0=0 +ellps=bessel
+towgs84=598.1,73.7,418.2,0.202,0.045,-2.455,6.7 +units=m +no_defs”
UTM Zone 51 on the Northern Hemishpere “+proj=utm +zone=51 +ellps=WGS84”
UTM Zone 51 on the Southern Hemishpere “+proj=utm +zone=51 +ellps=WGS84 +south”
>>> import wradlib.georef as georef
>>> # This is Gauss-Krueger Zone 3 (aka DHDN 3 aka Germany Zone 3)
>>> gk3 = create_projstr("gk", zone=3)
>>> latc = [54.5, 55.5]
>>> lonc = [9.5, 9.8]
>>> gk3_x, gk3_y = georef.project(latc, lonc, gk3)
3.5.7 wradlib.georef.create_projstr
wradlib.georef.create_projstr(projname, **kwargs)
Conveniently supports the construction of proj.4 projection strings
Currently, the following projection names (argument projname) are supported:
“aeqd”: Azimuthal Equidistant
needs the following keyword arguments: lat_0 (latitude at projection center), lon_0 (longitude at projection
center), x_0 (false Easting, also known as x-offset), y_0 (false Northing, also known as y-offset)
“gk” : Gauss-Krueger (for Germany)
only needs keyword argument zone (number of the Gauss-Krueger strip)
“utm” : Universal Transmercator
needs keyword arguments zone (integer) and optionally hemisphere (accepted values: “south”, “north”) see
Wikipedia entry for UTM zones.
“dwd-radolan” : RADOLAN Composite Coordinate System
no additional arguments needed.
Polar stereographic projection used by the German Weather Service (DWD) for all Radar composite products.
See the final report on the RADOLAN project (available at http://www.dwd.de/RADOLAN) for details.
46 Chapter 3. Library Reference