<template>
<dx-vector-map
id="vector-map"
:projection="customProjection"
title="Wagner VI projection"
>
<dx-layer
:data-source="world"
/>
<dx-layer
:data-source="coordLinesData"
:hover-enabled="false"
:border-width="1"
color="#aaa"
/>
<dx-export :enabled="true"/>
</dx-vector-map>
</template>
<script>
import {
DxVectorMap,
DxLayer,
DxExport,
} from 'devextreme-vue/vector-map';
import { coordLinesData } from './data.js';
import * as mapsData from 'devextreme/dist/js/vectormap-data/world.js';
const RADIANS = Math.PI / 180;
const WAGNER_6_P_LAT = Math.PI / Math.sqrt(3);
const WAGNER_6_U_LAT = 2 / Math.sqrt(3) - 0.1;
export default {
components: {
DxVectorMap,
DxLayer,
DxExport
},
data() {
return {
coordLinesData,
world: mapsData.world,
customProjection: {
aspectRatio: 2,
to([l, lt]) {
const x = l * RADIANS;
const y = Math.min(Math.max(lt * RADIANS, -WAGNER_6_P_LAT), +WAGNER_6_P_LAT);
const t = y / Math.PI;
return [
x / Math.PI * Math.sqrt(1 - 3 * t * t),
y * 2 / Math.PI
];
},
from([x, y]) {
y = Math.min(Math.max(y, -WAGNER_6_U_LAT), +WAGNER_6_U_LAT);
const t = y / 2;
return [
x * Math.PI / Math.sqrt(1 - 3 * t * t) / RADIANS,
y * Math.PI / 2 / RADIANS
];
}
}
};
}
};
</script>
<style>
#vector-map {
height: 400px;
}
</style>
import Vue from 'vue';
import App from './App.vue';
new Vue({
el: '#app',
components: { App },
template: '<App/>'
});
<!DOCTYPE html>
<html>
<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/19.2.4/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.2.4/css/dx.light.css" />
<script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script>
<script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script>
<script type="text/javascript" src="config.js"></script>
<script type="text/javascript">
System.import('./index.js');
</script>
</head>
<body class="dx-viewport">
<div class="demo-container">
<div id="app"></div>
</div>
</body>
</html>
export const coordLinesData = {
type: 'FeatureCollection',
features: []
};
//add meridians
for (let longitude = -180; longitude <= 180; longitude += 30) {
const lineCoords = [];
for (let 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]]
}
});
}
System.config({
transpiler: 'plugin-babel',
paths: {
'npm:': 'https://unpkg.com/'
},
map: {
vue: 'npm:vue@2.6.3/dist/vue.esm.browser.js',
'vue-loader': 'npm:dx-systemjs-vue-browser@latest/index.js',
'devextreme': 'npm:devextreme@19.2',
'devextreme/dist/js/vectormap-data': 'npm:devextreme@19.2/dist/js/vectormap-data',
'devextreme-vue': 'npm:devextreme-vue@19.2',
jszip: 'npm:jszip@3.1.3/dist/jszip.min.js',
'quill': 'npm:quill@1.3.7/dist/quill.js',
'devexpress-diagram': 'npm:devexpress-diagram',
'devexpress-gantt': 'npm:devexpress-gantt',
'plugin-babel': 'npm:systemjs-plugin-babel@0/plugin-babel.js',
'systemjs-babel-build':
'npm:systemjs-plugin-babel@0/systemjs-babel-browser.js'
},
meta: {
'*.vue': { loader: 'vue-loader' },
'devextreme/dist/js/vectormap-data/*': {
esModule: true
}
},
packages: {
'devextreme-vue': {
main: 'index.js'
},
'devextreme': {
defaultExtension: 'js'
}
},
babelOptions: {
sourceMaps: false,
stage0: true
}
});