/**
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* 将多个多边形的经纬度数组转换为标准的 MULTIPOLYGON WKT 格式
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* @param {Array<Array<Array<number>>>} multiPolygonCoordinates - 多个多边形的坐标数组
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* @returns {string} 标准化的 WKT 格式字符串
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*/
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export function convertToWKT(multiPolygonCoordinates) {
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// 检查输入是否为非空数组
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if (!Array.isArray(multiPolygonCoordinates) || multiPolygonCoordinates.length === 0) {
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throw new Error("Invalid input: 'multiPolygonCoordinates' must be a non-empty array of polygons.");
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}
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// 转换每个多边形的坐标
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const polygons = multiPolygonCoordinates.map(polygon => {
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if (!Array.isArray(polygon) || polygon.length === 0) {
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throw new Error("Invalid input: Each polygon must be a non-empty array of [longitude, latitude] points.");
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}
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// 检查每个点是否是有效的 [经度, 纬度] 数组
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for (const point of polygon) {
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if (!Array.isArray(point) || point.length !== 2 || typeof point[0] !== "number" || typeof point[1] !== "number") {
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throw new Error("Invalid input: Each coordinate must be an array of two numbers [longitude, latitude].");
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}
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}
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// 将每个多边形的坐标转换为 WKT 格式的字符串
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return `((${polygon.map(([lng, lat]) => `${lng} ${lat}`).join(",")}))`;
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});
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// 构建标准的 MULTIPOLYGON WKT 格式
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return `MULTIPOLYGON(${polygons.join(",")})`;
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}
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