CalvinBackup/iD
1
0
Fork 0
mirror of https://github.com/FoggedLens/iD.git synced 2026-05-14 21:28:11 +02:00
Code Issues Packages Projects Releases Wiki Activity

Fetch Esri tilemap at high zoom to determine max zoom

Browse Source 
The tilemap is only fetched if the user is at z > 18 and will not fetch again
unless the user has moved more than 1km away from the previous fetch
This commit is contained in:
Bryan Housel
2018-06-28 23:20:08 -04:00
parent eaa9d8d246
commit b6fb3a345d
3 changed files with 80 additions and 70 deletions
Download Patch File Download Diff File Expand all files Collapse all files
modules/renderer/background_source.js
+49 -39
View File
@@ -9,7 +9,13 @@ import {
import { json as d3_json } from 'd3-request';
import { t } from '../util/locale';
import { geoExtent, geoPolygonIntersectsPolygon } from '../geo';
import {
geoExtent,
geoPolygonIntersectsPolygon,
geoSphericalDistance
} from '../geo';
import { jsonpRequest } from '../util/jsonp_request';
import { utilDetect } from '../util/detect';
@@ -111,19 +117,20 @@ export function rendererBackgroundSource(data) {
var lat = Math.atan(sinh(Math.PI * (1 - 2 * y / zoomSize)));
switch (this.projection) {
case 'EPSG:4326': // todo: alternative codes of WGS 84?
return {
x: lon * 180 / Math.PI,
y: lat * 180 / Math.PI
};
default: // EPSG:3857 and synonyms
var mercCoords = d3_geoMercatorRaw(lon, lat);
return {
x: 20037508.34 / Math.PI * mercCoords[0],
y: 20037508.34 / Math.PI * mercCoords[1]
};
case 'EPSG:4326': // todo: alternative codes of WGS 84?
return {
x: lon * 180 / Math.PI,
y: lat * 180 / Math.PI
};
default: // EPSG:3857 and synonyms
var mercCoords = d3_geoMercatorRaw(lon, lat);
return {
x: 20037508.34 / Math.PI * mercCoords[0],
y: 20037508.34 / Math.PI * mercCoords[1]
};
}
}).bind(this);
var minXmaxY = tileToProjectedCoords(coord[0], coord[1], coord[2]);
var maxXminY = tileToProjectedCoords(coord[0]+1, coord[1]+1, coord[2]);
return template
@@ -207,13 +214,13 @@ rendererBackgroundSource.Bing = function(data, dispatch) {
data.template = 'https://ecn.t{switch:0,1,2,3}.tiles.virtualearth.net/tiles/a{u}.jpeg?g=587&mkt=en-gb&n=z';
var bing = rendererBackgroundSource(data),
key = 'Arzdiw4nlOJzRwOz__qailc8NiR31Tt51dN2D7cm57NrnceZnCpgOkmJhNpGoppU', // Same as P2 and JOSM
url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial?include=ImageryProviders&key=' +
key + '&jsonp={callback}',
cache = {},
inflight = {},
providers = [];
var bing = rendererBackgroundSource(data);
var key = 'Arzdiw4nlOJzRwOz__qailc8NiR31Tt51dN2D7cm57NrnceZnCpgOkmJhNpGoppU'; // Same as P2 and JOSM
var url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial?include=ImageryProviders&key=' +
key + '&jsonp={callback}';
var cache = {};
var inflight = {};
var providers = [];
jsonpRequest(url, function(json) {
providers = json.resourceSets[0].resources[0].imageryProviders.map(function(provider) {
@@ -246,10 +253,10 @@ rendererBackgroundSource.Bing = function(data, dispatch) {
bing.getMetadata = function(center, tileCoord, callback) {
var tileId = tileCoord.slice(0, 3).join('/'),
zoom = Math.min(tileCoord[2], 21),
centerPoint = center[1] + ',' + center[0], // lat,lng
url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial/' + centerPoint +
var tileId = tileCoord.slice(0, 3).join('/');
var zoom = Math.min(tileCoord[2], 21);
var centerPoint = center[1] + ',' + center[0]; // lat,lng
var url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial/' + centerPoint +
'?zl=' + zoom + '&key=' + key + '&jsonp={callback}';
if (inflight[tileId]) return;
@@ -292,13 +299,18 @@ rendererBackgroundSource.Bing = function(data, dispatch) {
rendererBackgroundSource.Esri = function(data) {
var esri = rendererBackgroundSource(data),
cache = {},
inflight = {};
var esri = rendererBackgroundSource(data);
var cache = {};
var inflight = {};
var _prevCenter;
// use a tilemap service to set maximum zoom for esri tiles dynamically
// https://developers.arcgis.com/documentation/tiled-elevation-service/
esri.fetchTilemap = function(center) {
// skip if we have already fetched a tilemap within 5km
if (_prevCenter && geoSphericalDistance(center, _prevCenter) < 5000) return;
_prevCenter = center;
// tiles are available globally to zoom level 19, afterward they may or may not be present
var z = 20;
@@ -316,30 +328,28 @@ rendererBackgroundSource.Esri = function(data) {
d3_json(tilemapUrl, function (err, tilemap) {
if (err || !tilemap) return;
var tiles = true;
for (var i=0; i<tilemap.data.length; i++) {
var hasTiles = true;
for (var i = 0; i < tilemap.data.length; i++) {
// 0 means an individual tile in the grid doesn't exist
if (!tilemap.data[i]) {
tiles = false;
hasTiles = false;
break;
}
}
// if any tiles are missing at level 20 we restrict maxZoom to 19
if (!tiles) {
esri.scaleExtent[1] = 19;
}
esri.scaleExtent[1] = (hasTiles ? 20 : 19);
});
};
esri.getMetadata = function(center, tileCoord, callback) {
var tileId = tileCoord.slice(0, 3).join('/'),
zoom = Math.min(tileCoord[2], esri.scaleExtent[1]),
centerPoint = center[0] + ',' + center[1], // long, lat (as it should be)
unknown = t('info_panels.background.unknown'),
metadataLayer,
vintage = {},
metadata = {};
var tileId = tileCoord.slice(0, 3).join('/');
var zoom = Math.min(tileCoord[2], esri.scaleExtent[1]);
var centerPoint = center[0] + ',' + center[1]; // long, lat (as it should be)
var unknown = t('info_panels.background.unknown');
var metadataLayer;
var vintage = {};
var metadata = {};
if (inflight[tileId]) return;