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| import DragAndDrop from 'ol/interaction/DragAndDrop.js';
import Map from 'ol/Map.js';
import View from 'ol/View.js';
import {GPX, GeoJSON, IGC, KML, TopoJSON} from 'ol/format.js';
import {Tile as TileLayer, Vector as VectorLayer} from 'ol/layer.js';
import {Vector as VectorSource, XYZ} from 'ol/source.js';
const key = 'Get your own API key at https://www.maptiler.com/cloud/';
const attributions =
'<a href="https://www.maptiler.com/copyright/" target="_blank">© MapTiler</a> ' +
'<a href="https://www.openstreetmap.org/copyright" target="_blank">© OpenStreetMap contributors</a>';
const map = new Map({
layers: [
new TileLayer({
source: new XYZ({
attributions: attributions,
url:
'https://api.maptiler.com/tiles/satellite/{z}/{x}/{y}.jpg?key=' + key,
maxZoom: 20,
}),
}),
],
target: 'map',
view: new View({
center: [0, 0],
zoom: 2,
}),
});
const extractStyles = document.getElementById('extractstyles');
let dragAndDropInteraction;
function setInteraction() {
if (dragAndDropInteraction) {
map.removeInteraction(dragAndDropInteraction);
}
dragAndDropInteraction = new DragAndDrop({
formatConstructors: [
GPX,
GeoJSON,
IGC,
new KML({extractStyles: extractStyles.checked}),
TopoJSON,
],
});
dragAndDropInteraction.on('addfeatures', function (event) {
const vectorSource = new VectorSource({
features: event.features,
});
map.addLayer(
new VectorLayer({
source: vectorSource,
})
);
map.getView().fit(vectorSource.getExtent());
});
map.addInteraction(dragAndDropInteraction);
}
setInteraction();
extractStyles.addEventListener('change', setInteraction);
const displayFeatureInfo = function (pixel) {
const features = [];
map.forEachFeatureAtPixel(pixel, function (feature) {
features.push(feature);
});
if (features.length > 0) {
const info = [];
let i, ii;
for (i = 0, ii = features.length; i < ii; ++i) {
info.push(features[i].get('name'));
}
document.getElementById('info').innerHTML = info.join(', ') || ' ';
} else {
document.getElementById('info').innerHTML = ' ';
}
};
map.on('pointermove', function (evt) {
if (evt.dragging) {
return;
}
const pixel = map.getEventPixel(evt.originalEvent);
displayFeatureInfo(pixel);
});
map.on('click', function (evt) {
displayFeatureInfo(evt.pixel);
});
const link = document.getElementById('download');
function download(fullpath, filename) {
fetch(fullpath)
.then(function (response) {
return response.blob();
})
.then(function (blob) {
link.href = URL.createObjectURL(blob);
link.download = filename;
link.click();
});
}
document.getElementById('download-gpx').addEventListener('click', function () {
download('data/gpx/fells_loop.gpx', 'fells_loop.gpx');
});
document
.getElementById('download-geojson')
.addEventListener('click', function () {
download('data/geojson/roads-seoul.geojson', 'roads-seoul.geojson');
});
document.getElementById('download-igc').addEventListener('click', function () {
download('data/igc/Ulrich-Prinz.igc', 'Ulrich-Prinz.igc');
});
document.getElementById('download-kml').addEventListener('click', function () {
download('data/kml/states.kml', 'states.kml');
});
document
.getElementById('download-topojson')
.addEventListener('click', function () {
download('data/topojson/fr-departments.json', 'fr-departments.json');
});
|
)
