dds-datasets-point

Sample code supporting Google Maps Platform JavaScript API documentation. author(s): Geo Developer IX Documentation Team

HTML

<!doctype html>
<!--
 @license
 Copyright 2026 Google LLC. All Rights Reserved.
 SPDX-License-Identifier: Apache-2.0
-->

<html>
  <head>
    <title>Style a point data feature</title>

    <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))})({
            });
    </script>
  </head>
  <body>
    <gmp-map
      map-id="5cd2c9ca1cf05670"
      center="40.780101, -73.967780"
      zoom="17"
      map-type-control="false"
      street-view-control="false"
      fullscreen-control="false">
      <div id="legend" slot="control-inline-start-block-start"></div>
      <div id="attributionLabel" slot="control-block-end-inline-start">
        Data source: NYC Open Data
      </div>
    </gmp-map>
  </body>
</html>

CSS

/**
 * @license
 * Copyright 2026 Google LLC. All Rights Reserved.
 * SPDX-License-Identifier: Apache-2.0
 */

/* 
 * Optional: Makes the sample page fill the window. 
 */
html,
body {
  height: 100%;
  margin: 0;
  padding: 0;
}

#attributionLabel {
  background-color: rgba(255, 255, 255, 0.8);
  font-family: 'Roboto', 'Arial', sans-serif;
  font-size: 10px;
  padding: 2px;
  margin: 2px;
}

#legend,
#dataset,
#counter {
  background-color: #e5e5e5;
  width: 15em;

  margin-left: 1em;
  border-radius: 8px;
  font-family: Roboto, sans-serif;
  overflow: hidden;
}

#dataset select {
  border-radius: 0;
  padding: 0.1em;
  border: 1px solid black;
  width: auto;
  margin: 0.5em 1em;
}

.title {
  padding: 0.5em 1em;
  font-weight: bold;
  font-size: 1.5em;
  margin-bottom: 0.5em;
  background-color: rgb(66, 133, 244);
  color: white;
  width: 100%;
}

.button {
  font-size: 1.2em;
  margin: 1em;
  background-color: rgb(66, 133, 244);
  color: white;
  padding: 0.5em;
  border-radius: 8px;
}

#legend #container {
  margin: 0.5em;
  display: flex;
}

#legend div .box {
  display: flex;
  width: 1em;
  height: 1em;
  border-radius: 50%;
  border: 2px solid;
}

#legend div .legend {
  display: flex;
  padding: 0.3em;
}

JavaScript

'use strict';
/**
 * @license
 * Copyright 2026 Google LLC. All Rights Reserved.
 * SPDX-License-Identifier: Apache-2.0
 */

const mapElement = document.querySelector('gmp-map');
let innerMap;

function setStyle(params) {
  // Get the dataset feature, so we can work with all of its attributes.
  const datasetFeature = params.feature;
  // Get all of the needed dataset attributes.
  const furColors =
    datasetFeature.datasetAttributes.CombinationofPrimaryandHighlightColor;

  // Apply styles. Fill is primary fur color, stroke is secondary fur color.
  switch (furColors) {
    case 'Black+':
      return {
        fillColor: 'black',
        pointRadius: 8,
      };
      break;
    case 'Cinnamon+':
      return {
        fillColor: '#8b0000',
        pointRadius: 8,
      };
      break;
    case 'Cinnamon+Gray':
      return {
        fillColor: '#8b0000',
        strokeColor: 'gray',
        pointRadius: 6,
      };
      break;
    case 'Cinnamon+White':
      return {
        fillColor: '#8b0000',
        strokeColor: 'white',
        pointRadius: 6,
      };
      break;
    case 'Gray+':
      return {
        fillColor: 'gray',
        pointRadius: 8,
      };
      break;
    case 'Gray+Cinnamon':
      return {
        fillColor: 'gray',
        strokeColor: '#8b0000',
        pointRadius: 6,
      };
      break;
    case 'Gray+Cinnamon, White':
      return {
        fillColor: 'silver',
        strokeColor: '#8b0000',
        pointRadius: 6,
      };
      break;
    case 'Gray+White':
      return {
        fillColor: 'gray',
        strokeColor: 'white',
        pointRadius: 6,
      };
      break;
    default: // Color not defined.
      return {
        fillColor: 'yellow',
        pointRadius: 8,
      };
      break;
  }
}

async function init() {
  // Request needed libraries.
  const [{ event }] = await Promise.all([
    google.maps.importLibrary('core'),
    google.maps.importLibrary('maps'),
  ]);

  // Get the inner map.
  innerMap =...