tms_image.py 文件源码

def __getitem__(self, geometry):
        if isinstance(geometry, BaseGeometry) or getattr(geometry, "__geo_interface__", None) is not None:
            if self._tms_meta._bounds is None:
                return self.aoi(geojson=mapping(geometry), from_proj=self.proj)
            image = GeoImage.__getitem__(self, geometry)
            image._tms_meta = self._tms_meta
            return image
        else:
            result = super(TmsImage, self).__getitem__(geometry)
            image = super(TmsImage, self.__class__).__new__(self.__class__,
                                                            result.dask, result.name, result.chunks,
                                                            result.dtype, result.shape)

            if all([isinstance(e, slice) for e in geometry]) and len(geometry) == len(self.shape):
                xmin, ymin, xmax, ymax = geometry[2].start, geometry[1].start, geometry[2].stop, geometry[1].stop
                xmin = 0 if xmin is None else xmin
                ymin = 0 if ymin is None else ymin
                xmax = self.shape[2] if xmax is None else xmax
                ymax = self.shape[1] if ymax is None else ymax

                g = ops.transform(self.__geo_transform__.fwd, box(xmin, ymin, xmax, ymax))
                image.__geo_interface__ = mapping(g)
                image.__geo_transform__ = self.__geo_transform__ + (xmin, ymin)
            else:
                image.__geo_interface__ = self.__geo_interface__
                image.__geo_transform__ = self.__geo_transform__
            image._tms_meta = self._tms_meta
            return image