Use projection definition provide by server (including projection extent)

src/app/constant.js

@@ -349,6 +349,13 @@ export const ZINDEXES = {
   }
 };
 
+/**
+ * @since v3.8
+ */
+export const API_BASE_URLS = {
+  CRS: '/crs/'  //Example /crs/<epsg_code>
+};
+
 export default {
   APP_VERSION,
   DEFAULT_EDITING_CAPABILITIES,
@@ -372,5 +379,6 @@ export default {
   TOC_LAYERS_INIT_STATUS,
   TOC_THEMES_INIT_STATUS,
   VIEWPORT,
-  ZINDEXES
+  ZINDEXES,
+  API_BASE_URLS
 };

src/app/g3w-ol/map/maphelpers.js

@@ -1,5 +1,4 @@
-const BaseLayers = require('g3w-ol/layers/bases');
-const Projections = require('g3w-ol/projection/projections');
+const BaseLayers = require('../layers/bases');
 
 const MapHelpers = {
   createViewer(opts={}){
@@ -26,10 +25,7 @@ const _Viewer = function(opts={}) {
     view,
     keyboardEventTarget: document
   };
-  if (opts.id) {
-    options.target = opts.id;
-  }
-  Projections.setApplicationProjections();
+  options.target = opts.id;
   const map  = new ol.Map(options);
   this.map = map;
 };

src/app/g3w-ol/projection/projection.js

@@ -1,25 +1,13 @@
-const GENERIC_GRID_EXTENT =  [0,0,8388608,8388608];
-const GRID_EXTENT_3857 = ol.proj.get('EPSG:3857').getExtent();
-const GENERIC_GRID_EXTENT_DEGREE = [-180,-90, 180, 90];
-/**
- * BACK COMPATIBILITY  < v3.5
- */
-const CUSTOM_PROJECTIONS_EXTENT = {
-  'EPSG:3876': [18835101.07,4367049.45,22702879.51,9383109.87],
-  'EPSG:32733': GRID_EXTENT_3857,
-  'EPSG:25833': [-2465144.8,3638055.41,2885759.28, 9493779.8]
-};
-
 const Projection = function(options={}) {
   if (!options.crs) return null;
-  const {epsg, proj4:proj4def, geographic=false, axisinverted=false, extent} = options.crs; // new structure of information crs from server
+  // structure of information crs from server set on each layer and base layer
+  const {epsg, proj4:proj4def, geographic=false, axisinverted=false, extent} = options.crs;
   proj4def && proj4.defs(epsg, proj4def);
   this._axisOrientation = axisinverted ? 'neu' : 'enu';
   const degrees = geographic;
   ol.proj.Projection.call(this, {
     code: epsg,
-    //FOR NOW FORCE TO GET EXTENT
-    extent: false ? extent : degrees ? GENERIC_GRID_EXTENT_DEGREE: CUSTOM_PROJECTIONS_EXTENT[epsg] || GENERIC_GRID_EXTENT,
+    extent,
     axisOrientation: this._axisOrientation,
     units: degrees ? 'degrees' : 'm'
   });

src/app/g3w-ol/projection/projections.js

@@ -1,104 +1,54 @@
-const Projection = require('g3w-ol/projection/projection');
-const ADDEDPROJECTIONS = ['EPSG:4326', 'EPSG:3857'];
+import {API_BASE_URLS} from 'constant';
+const Projection = require('./projection');
+const {XHR} = require('core/utils/utils');
+const {normalizeEpsg} = require('core/utils/geo');
 
 const Projections = {
+
+  /**
+   * @since v3.8
+   */
+  isRegistered(epsg) {
+    return ol.proj.get(epsg);
+  },
+
   get(crs={}) {
-    const cachedProjection = ADDEDPROJECTIONS.indexOf(crs.epsg) !== -1 ?  ol.proj.get(crs.epsg) : null;
+    const cachedProjection = this.isRegistered(crs.epsg);
     if (cachedProjection) return cachedProjection;
     const projection = new Projection({
       crs
     });
     ol.proj.addProjection(projection);
-    ADDEDPROJECTIONS.push(crs.epsg);
+    ol.proj.proj4.register(proj4);
     return projection;
   },
+
   /**
-   * extent get from https://epsg.io/
+   * Check and register epsg
+   * 
+   * @param epsg : "EPSG:<CODE>" Ex. "EPSG:4326"
+   * @returns {Promise<Projection>}
+   * @since v3.8
    */
-  setApplicationProjections() {
-    this.get({
-      epsg: "EPSG:3003",
-      proj4: "+proj=tmerc +lat_0=0 +lon_0=9 +k=0.9996 +x_0=1500000 +y_0=0 +ellps=intl +towgs84=-104.1,-49.1,-9.9,0.971,-2.917,0.714,-11.68 +units=m +no_defs",
-      axisinverted: false,
-      geographic: false,
-      extent: [1290650.93, 4190305.78, 2343702.24, 5261004.57]
-    });
-
-    this.get({
-      epsg: "EPSG:3004",
-      proj4: "+proj=tmerc +lat_0=0 +lon_0=15 +k=0.9996 +x_0=2520000 +y_0=0 +ellps=intl +towgs84=-104.1,-49.1,-9.9,0.971,-2.917,0.714,-11.68 +units=m +no_defs",
-      axisinverted: false,
-      geographic: false,
-      extent: [1782205.39, 4190307.02, 2834974.5, 5250474.42]
-    });
-
-    this.get({
-      epsg: "EPSG:3045",
-      proj4:"+proj=utm +zone=33 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs",
-      axisinverted: true,
-      geographic: false,
-      extent: [-2465144.8, 3638055.41, 2885759.28, 9493779.8]
-     });
-
-    this.get({
-      epsg:"EPSG:6708",
-      proj4:"+proj=utm +zone=33 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs",
-      axisinverted: true,
-      geographic: false,
-      extent: [-331278.39, 3846440.97, 865258.04, 5256332.65]
-    });
-
-    this.get({
-      epsg:"EPSG:32632",
-      proj4:"+proj=utm +zone=32 +datum=WGS84 +units=m +no_defs",
-      axisinverted: false,
-      geographic: false,
-      extent: [166021.44, 0.0, 833978.56, 9329005.18]
-    });
-
-    this.get({
-      epsg:"EPSG:32633",
-      proj4:"+proj=utm +zone=33 +ellps=WGS84 +datum=WGS84 +units=m +no_defs",
-      axisinverted: false,
-      geographic: false,
-      extent: [166021.44, 0.0, 833978.56, 9329005.18]
-    });
-
-    this.get({
-      epsg:"EPSG:32634",
-      proj4:"+proj=utm +zone=34 +datum=WGS84 +units=m +no_defs",
-      axisinverted: false,
-      geographic: false,
-      extent: [166021.44, 0.0, 833978.56, 9329005.18]
-    });
-
-    this.get({
-      epsg:"EPSG:25833",
-      proj4:"+proj=utm +zone=33 +ellps=GRS80 +units=m +no_defs",
-      axisinverted: false,
-      geographic: false,
-      extent: [-2465144.8,3638055.41,2885759.28, 9493779.8]
-    });
-
-    this.get({
-      epsg:"EPSG:23032",
-      proj4:"+proj=utm +zone=32 +ellps=intl +units=m +no_defs",
-      axisinverted: false,
-      geographic: false,
-      extent: [-1206117.77, 3859932.9, 2582411.08, 8051813.3]
-    });
-
-    this.get({
-      epsg:"EPSG:23033",
-      proj4:"+proj=utm +zone=33 +ellps=intl +units=m +no_defs",
-      axisinverted: false,
-      geographic: false,
-      extent: [-1767202.11, 3859945.89, 2023400.16, 8079073.01]
-   });
-    //REGISTER AT THE END THE CUSTOM PROJECTIONS
-    ol.proj.proj4.register(proj4)
+  registerProjection(epsg) {
+    return new Promise((resolve, reject) => {
+      let projection = this.isRegistered(epsg);
+      // check if already register
+      if (projection) resolve(projection);
+      else {
+        XHR.get({url: `${API_BASE_URLS.CRS}${epsg.split(':')[1]}`})
+          .then(({result, data}) => {
+            if (result)  {
+              data.epsg = normalizeEpsg(data.epsg);
+              projection = this.get(data);
+              ol.proj.proj4.register(proj4);
+              resolve(projection);
+            }
+          })
+          .catch(err => reject(err))
+      }
+    })
   }
 };
 
-
 module.exports = Projections;

src/app/gui/map/mapservice.js

@@ -89,9 +89,13 @@ function MapService(options={}) {
   this._mapLayers = [];
   this._externalMapLayers = [];
   this._externalLayers = [];
-  // array where store interactions added from plugin or extenal from application
+  // array where store interactions added from plugin or external from application
   this._externalInteractions = [];
   this.mapBaseLayers = {};
+  /**
+   * Default layers are OL layers that are add to map by default.
+   * Are used to show selection Features and/or highlight Layer feature
+   */
   this.defaultsLayers = {
     _style: {
       highlightLayer: {
@@ -1835,6 +1839,10 @@ proto._setUpDefaultLayers = function(){
   this.getMap().addLayer(this.defaultsLayers.selectionLayer);
 };
 
+/**
+ * Method to set Default layers (selectionLayer, and highlightLayer)
+ * always on top of layers stack of map to be always visible
+ */
 proto.moveDefaultLayersOnTop = function(zindex){
   this.setZIndexLayer({
     layer: this.defaultsLayers.highlightLayer,

src/components/MapAddLayer.vue

@@ -81,6 +81,8 @@ import { Chrome as ChromeComponent } from 'vue-color';
 
 import { EPSG } from 'app/constant';
 
+const Projections = require('g3w-ol/projection/projections');
+
 const { createVectorLayerFromFile, createStyleFunctionToVectorLayer } = require('core/utils/geo');
 
 const SUPPORTED_FORMAT = ['zip','geojson', 'GEOJSON',  'kml', 'kmz', 'KMZ', 'KML', 'json', 'gpx', 'gml', 'csv'];
@@ -246,11 +248,20 @@ export default {
       } catch(err){this.setError('add_external_layer');}
     },
     async addLayer() {
-      if (this.vectorLayer || this.csv.valid){
-        this.loading = true;
-        //Recreate always the vector layer because we can set the right epsg after first load the file
-        // if we change the epsg of the layer after loaded
+      if (this.vectorLayer || this.csv.valid) {
+        const {crs} = this.layer;
         try {
+          /**
+           * waiting to register a epsg choose if all go right
+           */
+          try {
+            await Projections.registerProjection(crs);
+          } catch(error) {
+            this.setError(error);
+            return;
+          }
+
+          this.loading = true;
           this.vectorLayer = await createVectorLayerFromFile(this.layer);
           this.vectorLayer.setStyle(createStyleFunctionToVectorLayer({
             color: this.layer.color,
@@ -260,10 +271,10 @@ export default {
             crs: this.layer.crs,
             type: this.layer.type,
             position: this.position
-
-        });
+          });
           $(this.$refs.modal_addlayer).modal('hide');
           this.clearLayer();
+
         } catch(err){
           this.setError('add_external_layer');
         }