Necesidad de ampliar una capa vectorial de un multipolígono

Question

Estoy obteniendo unas coordenadas multipoligonales de la DB en formato WKT. Soy capaz de mostrar lo mismo en el mapa. Pero el problema que estoy enfrentando es al hacer zoom al centro del Multipolígono. ¿Hay alguna manera de hacer zoom al centro del polígono en OL3 o de otra manera.

A continuación, la respuesta de mi DB:

["MULTIPOLYGON(((155917.153194497 210867.51599128,155917.193016207 210867.518011615,155917.232550311 210867.523198616,155917.271545395 210867.531519298,155917.309753475 210867.542920746,155917.346931569 210867.557330454,155917.382843247 210867.574656784,155917.417260133 210867.594789552,155917.449963355 210867.617600725,155917.459648623 210867.625136389,155925.049736443 210873.681616414,155930.5385101 210878.034228535,155930.557274147 210878.049870081,155930.57525183 210878.066409438,155930.592400237 210878.083807125,155930.608678436 210878.102021616,155930.62404757 210878.121009431,155930.638470954 210878.140725247,155930.651914158 210878.161122003,155930.664345095 210878.182151013,155930.675734091 210878.203762078,155930.686053962 210878.225903616,155930.695280073 210878.248522773,155930.703390403 210878.271565559,155930.710365592 210878.294976969,155930.716188989 210878.318701123,155930.720846696 210878.342681389,155930.724327594 210878.366860528,155930.726623373 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A continuación se muestra el código para mostrar la capa en el mapa:

var vectorSource = new ol.source.Vector({
  features: (new ol.format.WKT()).readFeatures(result)
});

vectorSource.addFeature(new ol.Feature(new ol.geom.Circle([5e6, 7e6], 1e6)));
var closevectorSource = new ol.source.Vector({
  features: (new ol.format.WKT()).readFeatures(result)
});

closevectorSource.addFeature(new ol.Feature(new ol.geom.Circle([5e6, 7e6], 1e6)));

var vectorLayer = new ol.layer.Vector({
      source: vectorSource,
      style: new ol.style.Style({
                            stroke: new ol.style.Stroke({
                              color:[255, 0, 0, 1.0],
                              opacity: 1,
                              width: 4
                              }),
                              fill: new ol.style.Stroke ({
                                  color: [255, 0, 0, 0.2]
                              })

              }),
         name: 'JMSvectorLayer'
        });
var JMSVectorLayer = findmapLayer("name","JMSvectorLayer");

if(JMSVectorLayer !== null){
    map.removeLayer(JMSVectorLayer);
    }

map.addLayer(vectorLayer);

Answer 1

Si consigues hacer zoom hasta el centroide de esa geometría no necesariamente verás nada porque el centroide está donde está la estrella roja en esta imagen.

Answer 2

Para acercarse a una característica y tener toda la característica a la vista se puede utilizar view.fit(feature.getGeometry())