spatial join w/ index

join.js

const rectangles = require('./buildings2.json').features
const points = require('./dmv_props.json').features
const bbox = require('@turf/bbox').default
const RBush = require('rbush')

function prepare(features) {
    return features.map(f => {
        const box = bbox(f)
        return {
            minX: box[0],
            minY: box[1],
            maxX: box[2],
            maxY: box[3],
            EGID: f.properties.EGID
        }
    })
}

function search (tree, point) {
    const [x, y] = point.geometry.coordinates
    return tree.search({
        minX: x,
        maxX: x,
        minY: y,
        maxY: y
    })
}

function index (features) {
    const tree = new RBush()
    const prepared = prepare(features)
    return tree.load(prepared)
}

const tree = index(rectangles)

points.forEach(p => {
    const [x, y] = p.geometry.coordinates
    const thingToFind = {
        minX: x,
        maxX: x,
        minY: y,
        maxY: y
    }
    // console.log(thingToFind)
    const found = tree.search(thingToFind)
    if (found[0]) {
        p.properties.EGID = found[0].EGID
    }
})

filtered = points.filter(p => !!p.properties.EGID)