Source code for opendrift.models.eulerdrift.srs

import as ccrs
import pyproj
import utm

[docs] def simulation(): """ Simulation Spatial Reference System (SRS) or Coordinate Reference System (CRS). Always just 'lonlat' ellipsoid 'WGS84' """ return pyproj.Proj('+proj=lonlat')
[docs] def find_utm_proj(lon, lat): """ Find a suitable UTM projection (zone) for lon and lat. .. warning:: UTM is only defined between 80S and 84N. Should use UPS for those regions. Returns: pyproj.Proj in `utm` projection. """ _, _, zone_no, _ = utm.from_latlon(lat, lon) band = 'south' if lat < 0 else 'north' return pyproj.Proj( '+proj=utm +zone={zone:d} +{band} +ellps=WGS84 +datum=WGS84 +units=m +no_defs' .format(zone=zone_no, band=band))
[docs] def find_utm_ccrs(lon, lat): """ Return Cartopy UTM CRS for lon and lat. """ _, _, zone_no, _ = utm.from_latlon(lat, lon) return ccrs.UTM(zone_no, True if lat < 0 else False)