Develop Reference

How to make a popup with GET/POST request ASP NET CORE

I have a map, with n numbers of markers with a unique ID. When I click on them a custom popup for that marker appears (using JS and CSS). Every time I click on one of the markers, I want it to send a POST request that will change the URL from ~/reports/index to ~report/index/custom_Id. I need it to be with a custom id in the URL because I need to load some popups from another page using GET request.
My code:
Load map:
<script type="text/javascript">
var layers = [new ol.layer.Tile({ source: new ol.source.OSM() })];
var map = new ol.Map({
target: 'map',
view: new ol.View({
zoom: 5,
center: [166326, 5992663]
}),
interactions: ol.interaction.defaults({ altShiftDragRotate: false, pinchRotate: false }),
layers: layers
});
const options = {
enableHighAccuracy: true,
timeout: 5000,
maximumAge: 0
};
function togglePopup(id) { //The function that revals the popup
document.getElementById("overlay-container-" + id).classList.toggle("active");
}
// Vector Feature Popup logic
map.on('click', function (e) { //The "sensor" that detects if a marker has been clicked.
map.forEachFeatureAtPixel(e.pixel, function (feature, layer) {
togglePopup(feature.getId());
resetCurrent();
handleImages(feature.getId());
})
})
Add markers (this is inside a bigger for loop):
<script type="text/javascript">
markers = new ol.layer.Vector({
source: new ol.source.Vector(),
style: new ol.style.Style({
image: new ol.style.Icon({
anchor: [0.5, 1],
src: 'https://ucarecdn.com/4b516de9-d43d-4b75-9f0f-ab0916bd85eb/marker.png' // => https://app.uploadcare.com/projects/c05bbeb5e1a61e862903/files/7110cd57-b0ee-4833-bcd1-ff0343dd01cc/?limit=100&ordering=-datetime_uploaded
})
})
});
map.addLayer(markers);
var marker = new ol.Feature(new ol.geom.Point([parseFloat(#_Data.coordLat), parseFloat(#_Data.coordLong)]));
marker.setId(#_Data.Id);
markers.getSource().addFeature(marker);
</script>
I know that if it was a HTML button for something like that I could have add asp-route-id=#_Data.Id or something but this is JS. How can I make it?

Openlayers and openstreetmap plot the route incorrectly

I have a WebView vehicle tracking application. I completed everything, but I could not manage to draw the path. What is the problem here?
var vectorSource = new ol.source.Vector(),
url_osrm_nearest = '//router.project-osrm.org/nearest/v1/driving/',
url_osrm_route = '//router.project-osrm.org/route/v1/driving/',
icon_url = '//cdn.rawgit.com/openlayers/ol3/master/examples/data/icon.png',
vectorLayer = new ol.layer.Vector({
source: vectorSource
}),
styles = {
route: new ol.style.Style({
stroke: new ol.style.Stroke({
width: 6, color: [40, 40, 40, 0.8]
})
}),
icon: new ol.style.Style({
image: new ol.style.Icon({
anchor: [0.5, 1],
src: icon_url
})
})
};
var utils = {
getNearest: function(coord){
var coord4326 =coord;
return new Promise(function(resolve, reject) {
//make sure the coord is on street
fetch(url_osrm_nearest + coord4326.join()).then(function(response) {
// Convert to JSON
return response.json();
}).then(function(json) {
if (json.code === 'Ok') resolve(json.waypoints[0].location);
else reject();
});
});
},
createFeature: function(coord) {
feature = new ol.Feature({
type: 'place',
geometry: new ol.geom.Point(coord)
});
//feature.setStyle(iconStyle3);
vectorSource.addFeature(feature);
},
createRoute: function(polyline) {
var route = new ol.format.Polyline({
factor: 1e5,
}).readGeometry(polyline);
feature = new ol.Feature({
type: 'route',
geometry: route
});
feature.setStyle(styles.route);
vectorSource.addFeature(feature);
},
to4326: function(coord) {
return ol.proj.transform([
parseFloat(coord[0]), parseFloat(coord[1])
]);
}
};
view = new ol.View({
center: [34.061624811814305,39.44893665949777],
zoom: 16,
projection: 'EPSG:4326',
});
const map = new ol.Map({
layers: [
new ol.layer.Tile({
source: new ol.source.OSM(),
}),
vectorLayer
],
target: 'map',
view: view,
});
const markerEl = document.getElementById('geolocation_marker');
const marker = new ol.Overlay({
positioning: 'center-center',
element: markerEl,
stopEvent: false
});
map.addOverlay(marker);
const markerEl2 = document.getElementById('geolocation_marker_musteri');
const marker2 = new ol.Overlay({
positioning: 'center-center',
element: markerEl2,
stopEvent: false
});
map.addOverlay(marker2);
const positions = new ol.geom.LineString([], ('XYZM'));
feature.getGeometry().setCoordinates([longi_,lati_]);
utils.getNearest([longi_,lati_]);
utils.getNearest([longi__v,lati_]);
utils.createFeature([longi__v,lati_]);
var point1 = [longi_,lati_];
var point2 = [longi__v,lati_];
fetch(url_osrm_route + point1 + ';' + point2).then(function(r) {
return r.json();
}).then(function(json) {
if(json.code !== 'Ok') {
return;
}
utils.createRoute(json.routes[0].geometry);
It draws a path as follows.
I'm looking at the route in openstreetmap with the same coordinates. It gives the correct route there. By the way, the coordinates are someone dynamic, that is, the position of the device. The other coordinate is stationary.
Edit:
I've realized now. It draws a straight line between two points. It doesn't draw according to the road.

I tried hard and couldn't find the solution. I also used openrouteservice instead of osm for geometry.
function get_JSON(coor1,coor2)
{
let request = new XMLHttpRequest();
request.open('POST', "https://api.openrouteservice.org/v2/directions/driving-car/json");
request.setRequestHeader('Accept', 'application/json, application/geo+json, application/gpx+xml, img/png; charset=utf-8');
request.setRequestHeader('Content-Type', 'application/json');
request.setRequestHeader('Authorization', 'api_key');
request.onreadystatechange = function () {
if (this.readyState === 4) {
var data_json= JSON.parse(this.responseText);
utils.createRoute(data_json.routes[0].geometry);
}
};
const body = '{"coordinates":[['+coor1+'],['+coor2+']],"radiuses":120000}';
request.send(body);
}

I want to have some coordinates on my openlayer map

i am trying to get some Dots on my Map with Openlayer. The Maps works fine. I got a JSON file with longitude and latitude and i want them to appear on my map. But it is not working. the parsing wont work somehow.
Error 1:
Error 2:
JSON file: https://github.com/CodeforChemnitz/Haltestellen/blob/gh-pages/haltestellen.json
My Code:
<div class="main-container-cvag">
<div id="map" class="map"></div>
<script src="https://openlayersbook.github.io/openlayers_book_samples/assets/ol3/js/ol.js"></script>
<script>
// Declare a Tile layer with an openstreetmap
var osmLayer = new ol.layer.Tile({
source: new ol.source.OSM()
});
// latitude and longitude to Chemnitz projection
var chemnitz = ol.proj.transform([12.9213697, 50.827845], 'EPSG:4326', 'EPSG:3857');
// Create a View, set it center and zoom level
var view = new ol.View({
center: chemnitz,
zoom: 13
});
//source
var chemnitzStationSource = new ol.source.Vector();
//dot style
function dotstyle(feature) {
var style = new ol.style.Style({
image: new ol.style.Circle({
radius: 6,
stroke: new ol.style.Stroke({
color: 'white',
width: 2
}),
fill: new ol.style.Fill({
color: 'green'
})
})
});
return [style];
}
//new layer
var chemnitzStations = new ol.layer.Vector({
source: chemnitzStationSource,
style: dotstyle
})
//new Map
var map = new ol.Map({
target: 'map',
layers: [osmLayer, chemnitzStations],
view: view
});
$.ajax({
url: "haltestellen.json",
dataType: "jsonp",
crossDomain: true,
success: function(data) {
var transform = ol.proj.getTransform('EPSG:4326', 'EPSG:3857');
data.items.forEach(function (item) {
var feature = new ol.Feature(item);
feature.set('url', item.stations);
var coordinate = transform([parseFloat(item.longitude), parseFloat(item.latitude)]);
var geometry = new ol.geom.Point(coordinate);
feature.setGeometry(geometry);
chemnitzStationSource.addFeature(feature);
console.log(parseFloat(item.longitude));
});
}
});
map.addLayer(osmLayer);
// Set the view for the map
map.setView(view);
</script>
</div>
Can someone help me what to do? :)

You are loading JSON, but have dataType: "jsonp".
Change it to dataType: "json",.

OpenLayers time to layer (time control)

I am new to OpenLayers and I would like to have something takes (date+time) and to get (layer) on the map
E.g I have layers for the Weather in (15.02.2010), (16.02.2010) and so on.
for example.. user enter (date+time) and the result (layer of the same date on the map)
Are there any ideas? Example? API!

Adapted from the OpenLayers example:
<input type="text" name="customParam" id="customParam">
<button onclick="showIt()">show it</button>
<script>
let source = null;
const map = new ol.Map({
target: 'map',
layers: [
new ol.layer.Tile({
source: new ol.source.OSM()
})
],
view: new ol.View({
center: [0, 0],
zoom: 2
})
});
function showIt() {
const customParam = document.getElementById("customParam").value;
const isNew = (!source);
if(isNew) {
source = new ol.source.XYZ();
}
source.setUrl(`https://{a-c}.MY-TILES.com/{z}/{x}/{y}.png?myTimeParam=${customParam}`);
source.refresh();
if(isNew) {
map.addLayer(new ol.layer.Tile({ source: source }));
}
}
</script>

Delete VectorLayer

I am trying to delete VectorSource Layer for redraw markers. The problem is that when I execute a setInterval function every 3 seconds, the new markers overlap to previous markers. The previous markers are not deleted.
I am trying with
map.getLayers().item(1).getSource().clear();
map.getLayers().item(1).getSource().getSource().clear();
But it not work.
So:
Mi code is:
var vectorSource = new ol.source.Vector({
features: iconFeatures //add an array of features
});
var clusterSource = new ol.source.Cluster({
source: vectorSource,
distance: 40
});
var vectorLayer = new ol.layer.Vector({
source: clusterSource,
style: clusterStyle
});
// Maps
var map = new ol.Map({
controls: ol.control.defaults({
attributionOptions: /** #type {olx.control.AttributionOptions} */ ({
collapsible: false
})
}),
target: 'map', // The DOM element that will contains the map
renderer: 'canvas', // Force the renderer to be used
layers: [
// Add a new Tile layer getting tiles from OpenStreetMap source
new ol.layer.Tile({
source: new ol.source.OSM()
//source: new ol.source.OSM({
//crossOrigin: null,
//url: 'http://34.240.39.198/osm_tiles/{z}/{x}/{y}.png',
//}),
}),
vectorLayer,
],
// Create a view centered on the specified location and zoom level
view: new ol.View({
center: ol.proj.transform([-3.7467975, 40.3705281], 'EPSG:4326', 'EPSG:3857'),
zoom: 3,
maxZoom: 15,
minZoom:2,
//extent: [226838, 5084100, 255700, 5055200],
}),
/*interactions: ol.interaction.defaults({
dragPan: false
}),*/
});
And function for Redraw is:
function get_traces(){
var token = $('meta[name="csrf-token"]').attr('content');
$.ajax({
type: "post",
url: "device_mapA",
typeData:'JSON',
data: {
'_method': 'POST',
'_token': token,
}, success: function (showdevice) {
removeAllMarkers();
iconFeatures = [];
showdevice[0].forEach(function(index) {
changeMarker(showdevice[0]); //this function redraw iconFeatures array correctly.
});
});
// console.log(iconFeatures);
var vectorSource = new ol.source.Vector({
features: iconFeatures //add an array of features
});
var clusterSource = new ol.source.Cluster({
source: vectorSource,
distance: 40
});
var vectorLayer = new ol.layer.Vector({
// source : vectorSource,
source: clusterSource,
style: clusterStyle
});
map.getLayers().item(1).getSource().clear();
map.getLayers().item(1).getSource().getSource().clear();
map.addLayer(vectorLayer);
map.getLayers().item(1).getSource().clear();
//console.log(map.getLayers().item(1).getSource()); It not working neither.
}

It does not actually abort those 7 iterations, it just skips those array items.
In your forEach cycle there is an array of references to map layers. If you take an element of that array (reference is "layer") and you remove it from map as it is, you remove the reference, so it is neither in the map nor in your array anymore and accidentally there is another reference on that index.
So if you have array:
0: layer0, name "layer0"
1: layer1, name "layer1"
2: layer2
after this forEach there will remain
0: layer1, name "layer1"
1: layer2
because after removal layer0, there is layer1 on the index 0 and AFTER that forEach moves along (to index 1), where it already finds layer without name.
To solve that, just use functions getArray() and slice() (to duplicate the reference array), something like that: