洪水淹没-修复当选择河段无数据时，还残留上一个河段的数据渲染点的问题

guoshilong

2023-02-27 31777eebd9fcab94a26a583b96de8a1b110e75c6

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    /**
     * @private
     */
    var TileEdge = {
        WEST: 0,
        NORTH: 1,
        EAST: 2,
        SOUTH: 3,
        NORTHWEST: 4,
        NORTHEAST: 5,
        SOUTHWEST: 6,
        SOUTHEAST: 7
    };
export default TileEdge;