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Style polygon data features

This example shows an approach to styling polygon geometry based data features.

Read the documentation.

[フレーム]

TypeScript

constmapElement=document.querySelector('gmp-map')!;
letinnerMap:google.maps.Map;
conststyleOptions={
strokeColor:'green',
strokeWeight:2,
strokeOpacity:1,
fillColor:'green',
fillOpacity:0.3,
};
asyncfunctioninit(){
// Request needed libraries.
awaitgoogle.maps.importLibrary('maps');
// Get the inner map.
innerMap=mapElement.innerMap;
// Dataset ID for NYC park data.
constdatasetId='a75dd002-ad20-4fe6-af60-27cd2ed636b4';
constdatasetLayer=innerMap.getDatasetFeatureLayer(datasetId);
datasetLayer.style=styleOptions;
}
voidinit();index.ts

JavaScript

constmapElement=document.querySelector('gmp-map');
letinnerMap;
conststyleOptions={
strokeColor:'green',
strokeWeight:2,
strokeOpacity:1,
fillColor:'green',
fillOpacity:0.3,
};
asyncfunctioninit(){
// Request needed libraries.
awaitgoogle.maps.importLibrary('maps');
// Get the inner map.
innerMap=mapElement.innerMap;
// Dataset ID for NYC park data.
constdatasetId='a75dd002-ad20-4fe6-af60-27cd2ed636b4';
constdatasetLayer=innerMap.getDatasetFeatureLayer(datasetId);
datasetLayer.style=styleOptions;
}
voidinit();index.js

CSS

/* 
 * Always set the map height explicitly to define the size of the div element
 * that contains the map. 
 */
gmp-map{
height:100%;
}
/* 
 * Optional: Makes the sample page fill the window. 
 */
html,
body{
height:100%;
margin:0;
padding:0;
}
#attribution{
background-color:rgba(255,255,255,0.7);
font-family:'Roboto','Arial',sans-serif;
font-size:10px;
padding:2px;
margin:2px;
}style.css

HTML

<html>
 <head>
 <title>Style a polygon data feature</title>
 <link rel="stylesheet" type="text/css" href="./style.css" />
 <script type="module" src="./index.js"></script>
 <script>
 // prettier-ignore
 (g=>{var h,a,k,p="The Google Maps JavaScript API",c="google",l="importLibrary",q="__ib__",m=document,b=window;b=b[c]||(b[c]={});var d=b.maps||(b.maps={}),r=new Set,e=new URLSearchParams,u=()=>h||(h=new Promise(async(f,n)=>{await (a=m.createElement("script"));e.set("libraries",[...r]+"");for(k in g)e.set(k.replace(/[A-Z]/g,t=>"_"+t[0].toLowerCase()),g[k]);e.set("callback",c+".maps."+q);a.src=`https://maps.${c}apis.com/maps/api/js?`+e;d[q]=f;a.onerror=()=>h=n(Error(p+" could not load."));a.nonce=m.querySelector("script[nonce]")?.nonce||"";m.head.append(a)}));d[l]?console.warn(p+" only loads once. Ignoring:",g):d[l]=(f,...n)=>r.add(f)&&u().then(()=>d[l](f,...n))})({
 key: "GOOGLE_MAPS_API_KEY"
 });
 </script>
 </head>
 <body>
 <gmp-map
 center="40.757815, -73.933123"
 zoom="11"
 map-id="5cd2c9ca1cf05670"
 map-type-control="false">
 <div id="attribution" slot="control-block-end-inline-start">
 Data source: NYC Open Data
 </div>
 </gmp-map>
 </body>
</html>index.html

Clone Sample

Git and Node.js are required to run this sample locally. Follow these instructions to install Node.js and NPM. The following commands clone, install dependencies and start the sample application.

gitclonehttps://github.com/googlemaps-samples/js-api-samples.git
cdsamples/dds-datasets-polygon
npmi
npmstart