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VectorMap

Custom Projection

Documentation
This demo illustrates the use of custom projections in the VectorMap widget. Wagner-VI projection is used in this example.
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<dx-vector-map id="vector-map" [projection]="projection.get('wagner-6')" [title]="'Wagner VI projection'"> <dxo-export [enabled]="true"></dxo-export> <dxi-layer [dataSource]="worldMap"></dxi-layer> <dxi-layer [dataSource]="coordLinesData" [hoverEnabled]="false" [borderWidth]="1" color="#aaa"></dxi-layer> </dx-vector-map>
import { NgModule, Component, enableProdMode } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { DxVectorMapModule } from 'devextreme-angular'; import { projection } from 'devextreme/viz/vector_map/projection'; import * as mapsData from 'vectormap-data/world.js'; import { FeatureCollection, Service } from './app.service'; const RADIANS = Math.PI / 180, WAGNER_6_P_LAT = Math.PI / Math.sqrt(3), WAGNER_6_U_LAT = 2 / Math.sqrt(3) - 0.1; if(!/localhost/.test(document.location.host)) { enableProdMode(); } @Component({ selector: 'demo-app', providers: [ Service ], templateUrl: 'app/app.component.html', styleUrls: ['app/app.component.css'] }) export class AppComponent { worldMap: any = mapsData.world; projection: any; coordLinesData: FeatureCollection; constructor(service: Service) { this.coordLinesData = service.getCoordLinesData(); this.projection = projection.add("wagner-6", projection({ aspectRatio: 2, to: function (coordinates) { let x = coordinates[0] * RADIANS, y = Math.min(Math.max(coordinates[1] * RADIANS, -WAGNER_6_P_LAT), +WAGNER_6_P_LAT), t = y / Math.PI; return [ x / Math.PI * Math.sqrt(1 - 3 * t * t), y * 2 / Math.PI ]; }, from: function (coordinates) { let x = coordinates[0], y = Math.min(Math.max(coordinates[1], -WAGNER_6_U_LAT), +WAGNER_6_U_LAT), t = y / 2; return [ x * Math.PI / Math.sqrt(1 - 3 * t * t) / RADIANS, y * Math.PI / 2 / RADIANS ]; } })); } } @NgModule({ imports: [ BrowserModule, DxVectorMapModule ], declarations: [AppComponent], bootstrap: [AppComponent] }) export class AppModule { } platformBrowserDynamic().bootstrapModule(AppModule);
/deep/ #vector-map { width: 100%; height: 400px; display: block; }
import { Injectable } from '@angular/core'; export class FeatureCollection { type: string; features: Feature[]; } export class Feature { geometry: FeatureGeometry; } export class FeatureGeometry { type: string; coordinates: number[][]; } let coordLinesData: FeatureCollection = { type: "FeatureCollection", features: [] }; //add meridians for (let longitude = -180; longitude <= 180; longitude += 30) { let lineCoords = []; for (var latitude = -90; latitude <= 90; latitude += 5) { lineCoords.push([longitude, latitude]); } coordLinesData.features.push({ geometry: { type: "LineString", coordinates: lineCoords } }); } //add parallels for (let latitude = -90; latitude <= 90; latitude += 30) { coordLinesData.features.push({ geometry: { type: "LineString", coordinates: [[ -180, latitude ], [ 180, latitude]] } }); } @Injectable() export class Service { getCoordLinesData(): FeatureCollection { return coordLinesData; } }
// In real applications, you should not transpile code in the browser. You can see how to create your own application with Angular 2 and DevExtreme here: // https://github.com/DevExpress/devextreme-angular/blob/master/README.md System.config({ transpiler: 'ts', typescriptOptions: { module: "commonjs", emitDecoratorMetadata: true, experimentalDecorators: true }, meta: { 'typescript': { "exports": "ts" } }, paths: { 'npm:': 'https://unpkg.com/' }, map: { 'ts': 'npm:plugin-typescript@7.0.6/lib/plugin.js', 'typescript': 'npm:typescript@2.2.2/lib/typescript.js', '@angular/core': 'npm:@angular/core@4.1.0/bundles/core.umd.js', '@angular/common': 'npm:@angular/common@4.1.0/bundles/common.umd.js', '@angular/compiler': 'npm:@angular/compiler@4.1.0/bundles/compiler.umd.js', '@angular/platform-browser': 'npm:@angular/platform-browser@4.1.0/bundles/platform-browser.umd.js', '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic@4.1.0/bundles/platform-browser-dynamic.umd.js', '@angular/http': 'npm:@angular/http@4.1.0/bundles/http.umd.js', '@angular/router': 'npm:@angular/router@4.1.0/bundles/router.umd.js', '@angular/forms': 'npm:@angular/forms@4.1.0/bundles/forms.umd.js', 'rxjs': 'npm:rxjs@5.3.1', 'devextreme': 'npm:devextreme@17.1', 'vectormap-data': 'npm:devextreme@17.1/dist/js/vectormap-data', 'jquery': 'npm:jquery@3.1.1/dist/jquery.min.js', 'jszip': 'npm:jszip@3.1.3/dist/jszip.min.js', 'devextreme-angular': 'npm:devextreme-angular@17.1' }, packages: { 'app': { main: './app.component.ts', defaultExtension: 'ts' }, 'devextreme': { defaultExtension: 'js' }, 'devextreme-angular': { main: 'index.js', defaultExtension: 'js' } } });
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>DevExtreme Demo</title> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/17.1.4/css/dx.spa.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/17.1.4/css/dx.common.css" /> <link rel="dx-theme" data-theme="generic.light" href="https://cdn3.devexpress.com/jslib/17.1.4/css/dx.light.css" /> <script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script> <script src="https://unpkg.com/zone.js@0.6.25/dist/zone.js"></script> <script src="https://unpkg.com/reflect-metadata@0.1.3/Reflect.js"></script> <script src="https://unpkg.com/systemjs@0.19.31/dist/system.js"></script> <script src="js/jquery-3.1.0.min.js"></script> <script src="config.js"></script> <script> System.import('app').catch(console.error.bind(console)); </script> </head> <body class="dx-viewport"> <div class="demo-container"> <demo-app>Loading...</demo-app> </div> </body> </html>