78 lines
2.6 KiB
JavaScript
78 lines
2.6 KiB
JavaScript
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import { getProp, parseSequence } from './util'
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import { polygon } from '@turf/helpers';
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import proj4 from 'proj4';
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export const LANDXML_PARCEL = 'parcel';
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export function convertParcels(xmlObj, projection, opts) {
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const originalPoints = getProp(xmlObj, "LandXML", "CgPoints", 0, "CgPoint");
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const originalParcels = getProp(xmlObj, "LandXML", "Parcels", 0, "Parcel");
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const points = {}
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const polygons = []
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// Parse out the points
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for ( let pt in originalPoints ) {
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const opt = originalPoints[pt]
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const name = opt.$.name.replace(/ /g,'');
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let coords = parseSequence(opt._).map(coord => parseFloat(coord))
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coords = [coords[1], coords[0]]
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coords = proj4(projection, 'WGS84', coords)
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points[name] = coords
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}
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// Parse out the parcels
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for ( let pc in originalParcels) {
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var opc = originalParcels[pc]
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var geom = opc.CoordGeom
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if (geom !== undefined) {
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let coords = []
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// Need to store the start to add at the end
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var endCoord = null
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var origCoords = opc.CoordGeom[0].Line
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for (let oc in origCoords) {
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// VERY important note. This code does NOT handle the other two types
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// of coordinate definitions, curves and irregular lines. TODO: fixme.
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var start = origCoords[oc].Start[0].$.pntRef
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// We don't use the end (it probably should be checked, because if the end isn't the start)
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var end = origCoords[oc].End[0].$.pntRef
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var startPoint = points[start]
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if (!startPoint) {
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// console.log('Failed to get start point', start, startPoint)
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} else {
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// Start creating the polygon
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coords.push(points[start])
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if (!endCoord) {
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// Store the first coord, to put back on to close the polygon
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endCoord = points[start]
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}
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}
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}
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if (coords.length > 2) {
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coords.push(endCoord)
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coords = [coords]
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// name="101" class="Lot" state="proposed" parcelType="Single"
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var parameters = {
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name: opc.$.name,
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landxmlClass: opc.$.class,
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landxmlState: opc.$.state,
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landxmlParcelType: opc.$.parcelType,
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landxmlType: LANDXML_PARCEL,
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}
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polygons.push(polygon(coords, parameters))
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} else {
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// console.log("Couldn't create a polygon because we found less than 2 coords")
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}
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} else {
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// console.log("No geometry")
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}
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}
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return polygons;
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}
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