abrman/landxml

LandXML Parser for Contour Geojson and 3D Models

Easily transform LandXML surfaces into stunning GeoJSON contours or immersive GLB models to explore within threeJS or any popular 3D software.

Features

• toGlb: Generate GLB models from LandXML surfaces.
• toGeojsonContours: Convert LandXML data into detailed contour GeoJSON representations.
• reprojectGeojson: Effortlessly reproject GeoJSON data to desired projection using proj4

Example: Retrieve GeoJSON Contours

import { toGeojsonContours, reprojectGeoJson } from "landxml";

const loadGeojson = async () => {
    const landXmlString = "<?xml version="1.0"?>...</LandXML>";
    const contourInterval = 2;
    const geojsonSurfaces = await toGeojsonContours(landXmlString, contourInterval);

    // Retrieve geojson with raw LandXML coordinates
    let { geojson, wktString } = geojsonSurfaces[0];

    // Reproject GeoJSON to a desired coordinate system (e.g., WGS84)
    const targetCoordinateSystem = wktString || "WGS84";
    const keepOriginalGeometryAsFeatureProperties = false;
    return reprojectGeoJson(geojson, wktString, targetCoordinateSystem, keepOriginalGeometryAsFeatureProperties);
}

Example: Convert to GLB 3D model

import { toGlb } from "landxml";

const LandXml2GlbModel = async () => {
    const landXmlString = "<?xml version="1.0"?>...</LandXML>";

    // Define how the model's origin should be positioned (options: "origin" | "auto" | [x: number, y: number])
    const center = "auto";
    const glbSurfaces = await toGlb(landXmlString, center);

    let { download, glb } = glbSurfaces[0];
    download()

    // Alternatively, process the raw binary data from the 'glb' variable (Uint8Array)
}