79 lines
2.6 KiB
JavaScript
79 lines
2.6 KiB
JavaScript
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function parseOSMData(xmlData) {
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const parser = new DOMParser();
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const xmlDoc = parser.parseFromString(xmlData, "text/xml");
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const ways = xmlDoc.getElementsByTagName("way");
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const nodes = xmlDoc.getElementsByTagName("node");
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const relations = xmlDoc.getElementsByTagName("relation");
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const nodeMap = new Map();
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// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><> ref
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for (let i = 0; i < nodes.length; i++) {
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const node = nodes[i];
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const id = node.getAttribute("id");
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const lat = parseFloat(node.getAttribute("lat"));
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const lon = parseFloat(node.getAttribute("lon"));
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nodeMap.set(id, [lat, lon]);
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}
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const wayMap = new Map();
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// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD> ways <20><><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><> ref
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for (let i = 0; i < ways.length; i++) {
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const way = ways[i];
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const nds = way.getElementsByTagName("nd");
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const coordinates = [];
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for (let k = 0; k < nds.length; k++) {
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const ref = nds[k].getAttribute("ref");
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if (nodeMap.has(ref)) {
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coordinates.push(nodeMap.get(ref));
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}
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}
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wayMap.set(way.getAttribute("id"), coordinates);
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}
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const parkBoundaries = [];
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for (let i = 0; i < relations.length; i++) {
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const relation = relations[i];
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const tags = relation.getElementsByTagName("tag");
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const members = relation.getElementsByTagName("member");
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let isParkBoundary = false;
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let relationName = '';
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// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD> <20><> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD>, <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD>
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for (let j = 0; j < tags.length; j++) {
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const tag = tags[j];
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const key = tag.getAttribute("k");
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const value = tag.getAttribute("v");
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if (key === "boundary" && value === "national_park") {
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isParkBoundary = true;
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} else if (key === "name") {
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relationName = value;
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}
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}
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// <20><><EFBFBD><EFBFBD> <20><><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>, <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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if (isParkBoundary) { // && relationName.includes("<22><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>")
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console.log(relationName);
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const coordinates = [];
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for (let k = 0; k < members.length; k++) {
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const member = members[k];
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if (member.getAttribute("type") === "way") {
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const ref = member.getAttribute("ref");
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if (wayMap.has(ref)) {
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coordinates.push(...wayMap.get(ref));
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}
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}
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}
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parkBoundaries.push(coordinates);
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}
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}
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return parkBoundaries;
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}
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