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CovJSON minimal visualization example
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| <!DOCTYPE html> | |
| <html> | |
| <style> | |
| html, body, #map { | |
| width: 100%; height: 100%; | |
| margin: 0; | |
| } | |
| </style> | |
| <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/leaflet/1.0.1/leaflet.css" /> | |
| <link rel="stylesheet" href="https://unpkg.com/leaflet-coverage@0.7.2/leaflet-coverage.css" /> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/leaflet/1.0.1/leaflet.js"></script> | |
| <script src="https://unpkg.com/covutils@0.6.1/covutils-lite.min.js"></script> | |
| <script src="https://cdn.jsdelivr.net/covjson-reader/0.16.3/covjson-reader.min.js"></script> | |
| <script src="https://unpkg.com/leaflet-coverage@0.7.2/leaflet-coverage.min.js"></script> | |
| <body> | |
| <div id="map"></div> | |
| <script> | |
| var map = L.map(document.getElementById('map'), { center: [10, 0], zoom: 2 }) | |
| L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png').addTo(map) | |
| var layers = L.control.layers(null, null, {collapsed: false}).addTo(map) | |
| var layer | |
| CovJSON.read('temperature.covjson').then(function (coverage) { | |
| layer = C.dataLayer(coverage, {parameter: 'temperature'}) | |
| .on('afterAdd', function () { | |
| C.legend(layer).addTo(map) | |
| map.fitBounds(layer.getBounds()) | |
| }) | |
| .addTo(map) | |
| layers.addOverlay(layer, 'Temperature') | |
| }) | |
| map.on('click', function (e) { | |
| new C.DraggableValuePopup({ | |
| layers: [layer] | |
| }).setLatLng(e.latlng).openOn(map) | |
| }) | |
| </script> | |
| </body> | |
| </html> |
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| { | |
| "type" : "Coverage", | |
| "domain" : { | |
| "type" : "Domain", | |
| "domainType" : "Grid", | |
| "axes": { | |
| "x" : { "start": 7, "stop": 14, "num": 4 }, | |
| "y" : { "start": 54, "stop": 48, "num": 4 } | |
| }, | |
| "referencing": [{ | |
| "coordinates": ["x","y"], | |
| "system": { | |
| "type": "GeographicCRS", | |
| "id": "http://www.opengis.net/def/crs/OGC/1.3/CRS84" | |
| } | |
| }] | |
| }, | |
| "parameters" : { | |
| "temperature": { | |
| "type" : "Parameter", | |
| "description": { | |
| "en": "Air temperature measured in degrees Celsius." | |
| }, | |
| "unit" : { | |
| "label": { | |
| "en": "Degree Celsius" | |
| }, | |
| "symbol": { | |
| "value": "Cel", | |
| "type": "http://www.opengis.net/def/uom/UCUM/" | |
| } | |
| }, | |
| "observedProperty" : { | |
| "id": "http://vocab.nerc.ac.uk/standard_name/air_temperature/", | |
| "label" : { | |
| "en": "Air temperature", | |
| "de": "Lufttemperatur" | |
| }, | |
| "description": { | |
| "en": "Air temperature is the bulk temperature of the air, not the surface (skin) temperature." | |
| } | |
| } | |
| } | |
| }, | |
| "ranges" : { | |
| "temperature" : { | |
| "type" : "NdArray", | |
| "dataType": "float", | |
| "axisNames": ["y", "x"], | |
| "shape": [4, 4], | |
| "values" : [ | |
| 17.3, 18.2, 16.5, 18.7, | |
| 18.1, 19.4, 17.2, 18.6, | |
| 19.2, 20.4, 21.1, 20.7, | |
| 21.1, 21.3, 20.5, 19.2 | |
| ] | |
| } | |
| } | |
| } |
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Demo: https://bl.ocks.org/letmaik/1adc7a1cc745b0a095da5cccc111cf77