openlayers 3，将多边形或线条聚类 [英] openlayers 3 , clustering polygons or linestings

问题描述

我一直在寻找一种使用openlayers 3将多边形聚类的方法，但是没有运气.我已经读到聚类仅适用于点，所以我正在考虑编辑ol.source.cluster. 所以有人做过，或者有其他解决方案吗?

i've been searching for a way to cluster polygons using openlayers 3 but no luck. i've read that clustering only works with points so i'm thinking about editing the ol.source.cluster . so had anyone done it, or got any other solutions?

亲切的问候

推荐答案

从openlayers 3.15.0开始，可以使用可选函数geometryFunction将所有几何类型聚类.来自 http://openlayers.org/en/v3.15.0/apidoc/ol.source.Cluster.html :

As of openlayers 3.15.0, it is possible to cluster all geometry types using an optional function, geometryFunction. From http://openlayers.org/en/v3.15.0/apidoc/ol.source.Cluster.html:

以ol.Feature作为参数并返回ol.geom.Point的函数 要素的聚类计算点.什么时候不应该使用某项功能 如果考虑将其用于群集，则该函数应返回null. 有关获取群集的方法，请参见ol.geom.Polygon#getInteriorPoint 多边形的计算点.

Function that takes an ol.Feature as argument and returns an ol.geom.Point as cluster calculation point for the feature. When a feature should not be considered for clustering, the function should return null. See ol.geom.Polygon#getInteriorPoint for a way to get a cluster calculation point for polygons.

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