choroplether.py 文件源码

def make_a_basemap(ax, ll_cnr, ru_cnr):
        bm = Basemap(
            projection=Choroplether.EPSG_4283_APPROXIMATION['projection'],
            ellps=Choroplether.EPSG_4283_APPROXIMATION['ellps'],
            lon_0=(ru_cnr[0] - ll_cnr[0]) / 2,
            lat_0=(ru_cnr[1] - ll_cnr[1]) / 2,
            llcrnrlon=ll_cnr[0],
            llcrnrlat=ll_cnr[1],
            urcrnrlon=ru_cnr[0],
            urcrnrlat=ru_cnr[1],
            lat_ts=0,
            resolution='i',
            suppress_ticks=True,
            ax=ax
        )
        return bm