[GIS] How to turn the data into a heatmap / intensity map

free softwareheat map

I have database that tracks a large number of entities. Each entity has a 'coverage area' or 'catchment area' – a radius in miles from a specified UK postcode, eg

Leyton office     4.3m    E11 4LL
Stratford office  5.2m    E15 6ZZ
East Ham office   2.1m    E4 8QQ

I want to turn this into a geographic intensity map – a map of a region which is shaded or coloured to indicate the number of entities that cover each point on the map. Segmentation into small regions is also acceptable.

This is probably a one-off project, so it's unlikely my organization will provide money to buy software. That means zero or at least low-cost solutions are preferable.

Best Answer

Maybe these links will help you:

How to build effective heat-maps?

with QGIS: http://alexsciuto.com/blog/2010/11/how-to-make-your-own-heat-map-pt-1-gathering-the-materials/

Python script: http://www.sethoscope.net/heatmap/

http://sk53-osm.blogspot.com/2011/01/heat-maps-from-osm-pois.html

Sorry for a non elaborated answer..

Related Solutions

[GIS] Leaflet Heatmap Dynamic data layer

You can load dynamically (with ajax) your PHP file and set the content into testData var, as in your previous script. Then execute your original script without any changes.

Note that you will use $.ajax() jquery method to be able to set 'async': false option.

var testData = (function () {
var testData = null;
$.ajax({
    'async': false,
    'global': false,
    'url': 'pat/to/your/heatMapData.php',
    'dataType': "json",
    'success': function (data) {
        testData = data;
    }
});
return testData;
})();

Be sure your PHP file return the wanted values and a well-formated json file. It can be tested online.

[GIS] OpenLayers HeatMap add customized data

You have missed out only one aspect in creating the feature object.

Working fiddle: http://jsfiddle.net/GFarkas/61dafv93/.

var pointFeature = new ol.Feature({
    labelPoint: lonLat,
    weight: 20 // e.g. temperature
});

You defined the labelPoint property of your feature, which isn't a default observable property and is used to label a multidimensional feature on one specific point. You have to use geometry instead, to pass your point's coordinates to the pointFeature object.

var pointFeature = new ol.Feature({
    geometry: lonLat,
    weight: 20 // e.g. temperature
});

Best Answer

Related Solutions

[GIS] Leaflet Heatmap Dynamic data layer

[GIS] OpenLayers HeatMap add customized data

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