vue3-openlayers

Appearance

ol-webgl-tile-layer ​

This example uses WebGL to raster tiles on a map.

Demo ​

Setup ​

Plugin usage ​

This component is part of the Layers plugin. If not installed globally, you need to import and use the plugin in your main.ts or use the explicit component import (see section below).

Import and use the Layers plugin
ts
import { createApp } from "vue";
import App from "./App.vue";

import {
  Map,
  Layers,
  Sources,
} from "vue3-openlayers";

const app = createApp(App);
// ...
app.use(Layers); 
// ...

Explicit import ​

If you don't want to install a plugin, you can import the component explicitly. It's available as a child of the named export Layers.

NOTE

The following documentation refers to the plugin usage. Please make sure to adopt the component names, when you decided to use explicit component imports (e. g. <ol-map> becomes <Map.OlMap> etc.).

Usage ​

Plugin UsageExplicit Import
<ol-webgl-tile-layer><Layers.OlWebglTileLayer>
vue
<template>
  <form>
    <fieldset>
      <label for="opacity-slider">Layer Opacity</label>
      <input
        type="range"
        id="opacity-slider"
        min="0"
        max="1"
        step="0.1"
        v-model.number="layerOpacity"
      />
      <span class="description">{{ layerOpacity }}</span>
    </fieldset>
    <fieldset>
      <label for="visibility-toggle">Layer Visibility:</label>
      <input type="checkbox" id="visibility-toggle" v-model="layerVisible" />
      <span> {{ layerVisible ? "Visible" : "Hidden" }}</span>
    </fieldset>
  </form>
  <ol-map
    :loadTilesWhileAnimating="true"
    :loadTilesWhileInteracting="true"
    style="height: 400px"
  >
    <ol-view
      ref="view"
      :center="center"
      :zoom="zoom"
      :projection="projection"
    />

    <ol-webgl-tile-layer
      :style="trueColor"
      :zIndex="1001"
      :opacity="layerOpacity"
      :visible="layerVisible"
    >
      <ol-source-geo-tiff
        :normalize="false"
        :sources="[
          {
            url: 'https://s2downloads.eox.at/demo/EOxCloudless/2020/rgbnir/s2cloudless2020-16bits_sinlge-file_z0-4.tif',
          },
        ]"
        :wrapX="true"
      />
    </ol-webgl-tile-layer>
  </ol-map>
</template>

<script setup>
import { ref } from "vue";

const center = ref([0, 0]);
const zoom = ref(2);
const projection = ref("EPSG:4326");
const layerOpacity = ref(1);
const layerVisible = ref(true);

const max = 3000;
function normalize(value) {
  return ["/", value, max];
}

const red = normalize(["band", 1]);
const green = normalize(["band", 2]);
const blue = normalize(["band", 3]);

const trueColor = ref({
  color: ["array", red, green, blue, 1],
  gamma: 1.1,
});
</script>

Properties ​

Props from OpenLayers ​

Properties are passed-trough from OpenLayers directly. Their types and default values can be checked-out in the official OpenLayers docs. Only some properties deviate caused by reserved keywords from Vue / HTML. This deviating props are described in the section below.

Deviating Properties ​

visible

The value for visible is set to true by default.

Events ​

You have access to all Events from the underlying source. Check out the official OpenLayers docs to see the available events tht will be fired.

html
<ol-webgl-tile-layer @error="handleEvent" />

Methods ​

You have access to all Methods from the underlying source. Check out the official OpenLayers docs to see the available methods.

To access the source, you can use a ref() as shown below:

vue
<template>
  <!-- ... -->
  <ol-webgl-tile-layer ref="layerRef" />
  <!-- ... -->
</template>

<script setup lang="ts">
import { ref, onMounted } from "vue";
import type WebGLTileLayer from "ol/layer/WebGLTile";

const layerRef = ref<{ tileLayer: WebGLTileLayer }>(null);

onMounted(() => {
  const layer: WebGLTileLayer = sourceRef.value?.tileLayer;
  // call your method on `layer`
});
</script>