Cannot Display GeoJSON Coordinates in Proper Order for Bubble Type Layer in Map
Environment
| Product | Progress Kendo UI Map |
| Progress Kendo UI version | Tested up to version 2017.2 504 |
Description
I want to draw a bubble layer on a Kendo UI Map from the GeoJSON response. Although I receive the data in \[Longitude, Latitude\] format, when the data is bound to the Map, the Map handles it in a reversed \[latitude, longitude\] order.
Suggested Workarounds
The Kendo UI Map does not provide a built-in solution for achieving this behavior. However, you can still work around this issue by applying custom logic.
The Map accepts a [Latitude, Longitude] format for its locations field. When you receive the data in a reversed order, modify the array prior to the binding and use schema.parse to update the array.
<!DOCTYPE html>
<html>
<head>
<base href="https://demos.telerik.com/kendo-ui/map/bubble-layer">
<style>html { font-size: 14px; font-family: Arial, Helvetica, sans-serif; }</style>
<title></title>
<link rel="stylesheet" href="https://kendo.cdn.telerik.com/2017.2.504/styles/kendo.common-material.min.css" />
<link rel="stylesheet" href="https://kendo.cdn.telerik.com/2017.2.504/styles/kendo.material.min.css" />
<link rel="stylesheet" href="https://kendo.cdn.telerik.com/2017.2.504/styles/kendo.material.mobile.min.css" />
<script src="https://kendo.cdn.telerik.com/2017.2.504/js/jquery.min.js"></script>
<script src="https://kendo.cdn.telerik.com/2017.2.504/js/kendo.all.min.js"></script>
</head>
<body>
<div id="example">
<div id="map"></div>
<script>
function createMap() {
$("#map").kendoMap({
center: [45, 45],
minZoom: 3,
zoom: 4,
wraparound: false,
layers: [{
type: "tile",
urlTemplate: "http://#= subdomain #.tile.openstreetmap.org/#= zoom #/#= x #/#= y #.png",
subdomains: ["a", "b", "c"],
attribution: "© <a href='http://osm.org/copyright'>OpenStreetMap contributors</a>"
}, {
type: "bubble",
attribution: "Population data from Nordpil and UN Population Division.",
style: {
fill: {
color: "#00f",
opacity: 0.4
},
stroke: {
width: 0
}
},
dataSource: {
transport: {
read: {
url: "../content/dataviz/map/urban-areas.json",
dataType: "json"
}
},
schema: {
parse: function(response) {
for (var i = 0; i < response.length; i++) {
var loc = response[i].Location; // Location is the locationField with the coordinates
response[i].Location = [loc[1], loc[0]];
}
return response;
}
}
},
locationField: "Location",
valueField: "Pop2010"
}]
});
}
$(document).ready(createMap);
</script>
</div>
</body>
</html>