Python crs.Globe方法代码示例

# 需要导入模块: from cartopy import crs [as 别名]
# 或者: from cartopy.crs import Globe [as 别名]
def setup(self):
        # Image length.
        self.imlen = 256

        # Image.
        self.img = Image.open(
            "LunarLROLrocKaguya_1180mperpix_downsamp.png").convert("L")
        self.imgsize = self.img.size

        # Crater catalogue.
        self.craters = igen.ReadLROCHeadCombinedCraterCSV(
            filelroc="../catalogues/LROCCraters.csv",
            filehead="../catalogues/HeadCraters.csv",
            sortlat=True)

        # Long/lat limits
        self.cdim = [-180., 180., -60., 60.]

        # Coordinate systems.
        self.iglobe = ccrs.Globe(semimajor_axis=1737400,
                                 semiminor_axis=1737400,
                                 ellipse=None)
        self.geoproj = ccrs.Geodetic(globe=self.iglobe)
        self.iproj = ccrs.PlateCarree(globe=self.iglobe) 

# 需要导入模块: from cartopy import crs [as 别名]
# 或者: from cartopy.crs import Globe [as 别名]
def _globe_from_proj4(proj4_terms):
    """Create a `Globe` object from PROJ.4 parameters."""
    globe_terms = filter(lambda term: term[0] in _GLOBE_PARAMS,
                         proj4_terms.items())
    globe = ccrs.Globe(**{_GLOBE_PARAMS[name]: value for name, value in
                          globe_terms})
    return globe


# copy of class in cartopy (before it was released) 

# 需要导入模块: from cartopy import crs [as 别名]
# 或者: from cartopy.crs import Globe [as 别名]
def load(self, df, centerings):
        """
        A meta-method which abstracts the internals of individual projections' load procedures.

        Parameters
        ----------
        df : GeoDataFrame
            The GeoDataFrame which has been passed as input to the plotter at the top level.
            This data is needed to calculate reasonable centering variables in cases in which the
            user does not already provide them; which is, incidentally, the reason behind all of
            this funny twice-instantiation loading in the first place.
        centerings: dict
            A dictionary containing names and centering methods. Certain projections have certain
            centering parameters whilst others lack them. For example, the geospatial projection
            contains both ``central_longitude`` and ``central_latitude`` instance parameter, which
            together control the center of the plot, while the North Pole Stereo projection has
            only a ``central_longitude`` instance parameter, implying that latitude is fixed (as
            indeed it is, as this projection is centered on the North Pole!).

            A top-level centerings method is provided in each of the ``geoplot`` top-level plot
            functions; each of the projection wrapper classes defined here in turn selects the
            functions from this list relevent to this particular instance and passes them to
            the ``_generic_load`` method here.

            We then in turn execute these functions to get defaults for our ``df`` and pass them
            off to our output ``cartopy.crs`` instance.

        Returns
        -------
        crs : ``cartopy.crs`` object instance
            Returns a ``cartopy.crs`` object instance whose appropriate instance variables have
            been set to reasonable defaults wherever not already provided by the user.
        """
        # WebMercator is a special case.
        if self.__class__.__name__ == 'WebMercator':
            class WebMercator(ccrs.Mercator):
                def __init__(self, args):
                    super().__init__(
                        central_longitude=0,
                        min_latitude=-85.0511287798066,
                        max_latitude=85.0511287798066,
                        globe=ccrs.Globe(
                            ellipse=None,
                            semimajor_axis=ccrs.WGS84_SEMIMAJOR_AXIS,
                            semiminor_axis=ccrs.WGS84_SEMIMAJOR_AXIS,
                            nadgrids='@null'
                        ),
                        **args
                    )
            return WebMercator(self.args)
        else:
            return getattr(ccrs, self.__class__.__name__)(**{**centerings, **self.args})