124 lines
2.7 KiB
JavaScript
124 lines
2.7 KiB
JavaScript
"use strict";
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import path from 'path';
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import L from 'leaflet';
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import * as tf from '@tensorflow/tfjs';
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import chroma from 'chroma-js';
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import GetFromUrl from './Helpers/GetFromUrl.mjs';
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import Config from './ClientConfig.mjs';
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import { normalise } from '../../common/Math.mjs';
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class LayerAI {
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get gateway_bounds() {
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let result = {
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east: Infinity,
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west: -Infinity,
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north: Infinity,
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south: -Infinity
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};
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for(let gateway of this.index) {
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result.east = Math.min(gateway.longitude, result.east);
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result.west = Math.max(gateway.longitude, result.west);
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result.north = Math.min(gateway.latitude, result.north);
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result.south = Math.max(gateway.latitude, result.south);
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}
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return result;
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}
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constructor(map) {
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this.map = map;
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this.gateways = new Map();
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}
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async setup() {
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this.index = JSON.parse(
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await GetFromUrl(Config.ai_index_file)
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);
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console.log(index);
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for(let gateway of this.index.index) {
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this.gateways.set(
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gateway.id,
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await tf.LayersModel.loadModel(`${window.location.href}/${path.dirname(Config.ai_index_file)}/${gateway.id}`)
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);
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}
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this.layer = this.generate_layer();
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this.layer.addTo(this.map);
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}
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generate_layer() {
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return L.geoJSON(this.render_map(), {
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style: (feature) => { return {
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fillColor: feature.properties.colour,
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fillOpacity: 0.4
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} }
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});
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}
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render_map() {
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// FUTURE: Do this in a web worker?
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let map_bounds = this.gateway_bounds;
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map_bounds.north += Config.border;
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map_bounds.south -= Config.border;
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map_bounds.east += Config.border;
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map_bounds.west -= Config.border;
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let coverage = [],
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colour_scale = chroma.scale(
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Config.colour_scale.min,
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Config.colour_scale.max
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).domain(
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this.index.properties.rssi_min,
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this.index.properties.rssi_max
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);
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for(let lat = map_bounds.west; lat < map_bounds.east; lat += Config.step) {
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for(let lng = map_bounds.south; lng < map_bounds.north; lng += Config.step) {
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let max_predicted_rssi = -Infinity;
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for(let [, ai] of this.gateways) {
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max_predicted_rssi = Math.max(
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max_predicted_rssi,
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ai.predict(
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tf.tensor1d([ lat, lng ])
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)
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);
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}
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max_predicted_rssi = normalise(max_predicted_rssi,
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{ min: 0, max: 1 },
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{
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min: this.index.properties.rssi_min,
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max: this.index.properties.rssi_max
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}
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);
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coverage.push({
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type: "Feature",
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geometry: {
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type: "Polygon",
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coordinates: [
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[lat, lng],
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[lat + Config.step, lng],
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[lat + Config.step, lng + Config.step],
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[lat, lng + Config.step]
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]
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},
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properties: {
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colour: colour_scale(max_predicted_rssi)
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}
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})
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}
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}
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return coverage;
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}
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}
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export default LayerAI;
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