tilegrids.py 文件源码

def iterGrid(self, minZoom, maxZoom):
        "Yields the tileBounds, zoom, tileCol and tileRow"
        assert minZoom in range(0, len(self.RESOLUTIONS))
        assert maxZoom in range(0, len(self.RESOLUTIONS))
        assert minZoom <= maxZoom

        for zoom in xrange(minZoom, maxZoom + 1):
            [minRow, minCol, maxRow, maxCol] = self.getExtentAddress(zoom)
            for row in xrange(minRow, maxRow + 1):
                for col in xrange(minCol, maxCol + 1):
                    tileBounds = self.tileBounds(zoom, col, row)
                    yield (tileBounds, zoom, col, row)