Implement clustering statistics display based on openlayers and openlayers Clustering

Implement clustering statistics display based on openlayers and openlayers Clustering

Overview:

In the previous blog, we talked about how to implement clustering statistics display based on Arcgis for js and how to implement clustering statistics based on openlayers. The address of the blog post on Arcgis for js clustering statistics is:

Http://blog.csdn.net/gisshixisheng/article/details/40867989

Effect:

Key points:

Implementation Code:

1. Data Format

2. Set the display style

            var style = new OpenLayers.Style({                fillColor: "#ffcc66",                strokeColor: "#ff9933",                strokeWidth: 2,                label: "${count}",                fontColor: "#333333",                fontFamily: "sans-serif",                fontWeight: "bold"            }, {                rules: [                    new OpenLayers.Rule({                        minScaleDenominator: 100000000,                        symbolizer: {                            pointRadius: 7,                            fontSize: "9px"                        }                    }),                    new OpenLayers.Rule({                        maxScaleDenominator: 100000000,                        minScaleDenominator: 50000000,                        symbolizer: {                            pointRadius: 10,                            fontSize: "11px"                        }                    }),                    new OpenLayers.Rule({                        maxScaleDenominator: 50000000,                        symbolizer: {                            pointRadius: 13,                            fontSize: "13px"                        }                    })                ]            });

3. Add a vector Layer

            var features = new Array();            for (var i=0; i<data.length; i++) {                features[i] = new OpenLayers.Feature.Vector(                        new OpenLayers.Geometry.Point(data[i].x, data[i].y),                        {                            count:data[i].count,                            name:data[i].name                        }                );            }            var clusterLayer = new OpenLayers.Layer.Vector("Points", {                styleMap: new OpenLayers.StyleMap(style)            });            clusterLayer.addFeatures(features);            map1.addLayer(clusterLayer);

Complete program code;

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