76 lines
1.9 KiB
JavaScript
76 lines
1.9 KiB
JavaScript
import Map from '../src/ol/Map.js';
|
|
import View from '../src/ol/View.js';
|
|
import * as _ol_extent_ from '../src/ol/extent.js';
|
|
import TileLayer from '../src/ol/layer/Tile.js';
|
|
import {transformExtent} from '../src/ol/proj.js';
|
|
import _ol_source_Stamen_ from '../src/ol/source/Stamen.js';
|
|
import _ol_source_TileWMS_ from '../src/ol/source/TileWMS.js';
|
|
|
|
function threeHoursAgo() {
|
|
return new Date(Math.round(Date.now() / 3600000) * 3600000 - 3600000 * 3);
|
|
}
|
|
|
|
var extent = transformExtent([-126, 24, -66, 50], 'EPSG:4326', 'EPSG:3857');
|
|
var startDate = threeHoursAgo();
|
|
var frameRate = 0.5; // frames per second
|
|
var animationId = null;
|
|
|
|
var layers = [
|
|
new TileLayer({
|
|
source: new _ol_source_Stamen_({
|
|
layer: 'terrain'
|
|
})
|
|
}),
|
|
new TileLayer({
|
|
extent: extent,
|
|
source: new _ol_source_TileWMS_({
|
|
attributions: ['Iowa State University'],
|
|
url: 'https://mesonet.agron.iastate.edu/cgi-bin/wms/nexrad/n0r-t.cgi',
|
|
params: {'LAYERS': 'nexrad-n0r-wmst'}
|
|
})
|
|
})
|
|
];
|
|
var map = new Map({
|
|
layers: layers,
|
|
target: 'map',
|
|
view: new View({
|
|
center: _ol_extent_.getCenter(extent),
|
|
zoom: 4
|
|
})
|
|
});
|
|
|
|
function updateInfo() {
|
|
var el = document.getElementById('info');
|
|
el.innerHTML = startDate.toISOString();
|
|
}
|
|
|
|
function setTime() {
|
|
startDate.setMinutes(startDate.getMinutes() + 15);
|
|
if (startDate > Date.now()) {
|
|
startDate = threeHoursAgo();
|
|
}
|
|
layers[1].getSource().updateParams({'TIME': startDate.toISOString()});
|
|
updateInfo();
|
|
}
|
|
setTime();
|
|
|
|
var stop = function() {
|
|
if (animationId !== null) {
|
|
window.clearInterval(animationId);
|
|
animationId = null;
|
|
}
|
|
};
|
|
|
|
var play = function() {
|
|
stop();
|
|
animationId = window.setInterval(setTime, 1000 / frameRate);
|
|
};
|
|
|
|
var startButton = document.getElementById('play');
|
|
startButton.addEventListener('click', play, false);
|
|
|
|
var stopButton = document.getElementById('pause');
|
|
stopButton.addEventListener('click', stop, false);
|
|
|
|
updateInfo();
|