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refactor(geo): define shared distance contract

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onionviolet committed 2026-09-16 08:48:31 -04:00
1 parent a65d9d85f1
commit 9c638fa290
22 files changed
+267 -195
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src/layers/bikeshare/model.js
+3 -9
View File
@@ -1,3 +1,5 @@
import { greatCircleKm } from '../../geoDistance.js';
export function createModel({ state: layerState, services, parts, source }) {
/**
* Coerce a GBFS boolean field to a native boolean.
@@ -52,15 +54,7 @@ export function createModel({ state: layerState, services, parts, source }) {
*/
function haversineKm(aLat, aLon, bLat, bLon) {
const toRad = (value) => (value * Math.PI) / 180;
const dLat = toRad(bLat - aLat);
const dLon = toRad(bLon - aLon);
const p1 = toRad(aLat);
const p2 = toRad(bLat);
const a =
Math.sin(dLat / 2) ** 2 +
Math.cos(p1) * Math.cos(p2) * Math.sin(dLon / 2) ** 2;
return 6371 * 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
return greatCircleKm({ lat: aLat, lon: aLon }, { lat: bLat, lon: bLon });
}
/**
src/layers/cctv/model.js
+2 -6
View File
@@ -1,4 +1,5 @@
import * as Cesium from 'cesium';
import { greatCircleKm } from '../../geoDistance.js';
import { staticFrameRefreshMs } from '../../data/cctvLod.js';
import { frameFetchDue, cardFetchPolicy } from '../../data/cctvCards.js';
import { DEFAULT_CAMERA_CALIBRATION } from './policy.js';
@@ -298,12 +299,7 @@ export function createModel({ state: layerState, services, parts, source }) {
*/
function haversineKm(lat1, lon1, lat2, lon2) {
const dLat = toRad(lat2 - lat1);
const dLon = toRad(lon2 - lon1);
const a =
Math.sin(dLat / 2) ** 2 +
Math.cos(toRad(lat1)) * Math.cos(toRad(lat2)) * Math.sin(dLon / 2) ** 2;
return 6371 * 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
return greatCircleKm({ lat: lat1, lon: lon1 }, { lat: lat2, lon: lon2 });
}
/**