Nearby Search

選取平台： Android iOS JavaScript 網頁服務
歐洲經濟區 (EEA) 開發人員

Nearby Search (新版) 會採用一或多個地點類型，傳回相符地點清單。在下列範例中，您可以選擇地點類型，並在地圖上查看結果。按一下標記即可查看地點的詳細資料。

Nearby Search (新版) 會根據您指定的地點類型 (例如 restaurant、book_store 或 bowling_alley)，傳回一組地點的相關資訊。這項服務會傳回指定 locationRestriction 半徑內符合指定地點類型的地點清單。

如要使用 Nearby Search (新版)，請務必在 Google Cloud 專案中啟用「Places API (新版)」。詳情請參閱「開始使用」一文。

尋找附近地點

呼叫 searchNearby() 即可根據指定的地點類型、地區和半徑傳回地點清單。請使用要求指定搜尋參數，然後呼叫 searchNearby()。系統會以 Place 物件清單的形式傳回結果，您可從中取得地點詳細資料。以下程式碼片段範例顯示一項要求，以及對 searchNearby() 的呼叫。

TypeScript

// Get bounds and radius to constrain search.
center = mapElement.center;
let bounds = innerMap.getBounds();
const ne = bounds.getNorthEast();
const sw = bounds.getSouthWest();
const diameter = spherical.computeDistanceBetween(ne, sw);
const radius = Math.min((diameter / 2), 50000); // Radius cannot be more than 50000.

const request = {
    // required parameters
    fields: ['displayName', 'location', 'formattedAddress', 'googleMapsURI'],
    locationRestriction: {
        center,
        radius,
    },
    // optional parameters
    includedPrimaryTypes: [typeSelect.value],
    maxResultCount: 5,
    rankPreference: SearchNearbyRankPreference.POPULARITY,
};

const { places } = await Place.searchNearby(request);
index.ts

JavaScript

// Get bounds and radius to constrain search.
center = mapElement.center;
let bounds = innerMap.getBounds();
const ne = bounds.getNorthEast();
const sw = bounds.getSouthWest();
const diameter = spherical.computeDistanceBetween(ne, sw);
const radius = Math.min((diameter / 2), 50000); // Radius cannot be more than 50000.
const request = {
    // required parameters
    fields: ['displayName', 'location', 'formattedAddress', 'googleMapsURI'],
    locationRestriction: {
        center,
        radius,
    },
    // optional parameters
    includedPrimaryTypes: [typeSelect.value],
    maxResultCount: 5,
    rankPreference: SearchNearbyRankPreference.POPULARITY,
};
const { places } = await Place.searchNearby(request);
index.js
  • fields 參數 (必要) 可指定一份以半形逗號分隔的清單，其中包含一或多個資料欄位。
  • locationRestriction 參數 (必要) 可指定半徑 (上限 50,000 公尺)。
  • includedPrimaryTypes 參數可指定一或多個要搜尋的地點類型。
  • rankPreference 參數可指定要將 SearchNearbyRankPreference 設為 POPULARITY 或 DISTANCE。
  • 參閱完整的參數清單。

範例

以下範例採用 searchNearby() 查詢地圖邊界內所選類型的地點，並在地圖中填入標記以顯示查詢結果。

TypeScript

const mapElement = document.querySelector('gmp-map') as google.maps.MapElement;
let innerMap;
const advancedMarkerElement = document.querySelector('gmp-advanced-marker') as google.maps.marker.AdvancedMarkerElement;
let center;
let typeSelect;
let infoWindow;

async function initMap() {
    const { Map, InfoWindow } = await google.maps.importLibrary('maps') as google.maps.MapsLibrary;
    const { LatLng } = await google.maps.importLibrary("core") as google.maps.CoreLibrary;

    innerMap = mapElement.innerMap;
    innerMap.setOptions({
        mapTypeControl: false,
    });

    typeSelect = document.querySelector(".type-select");

    typeSelect.addEventListener('change', () => {
        nearbySearch();
    });

    infoWindow = new InfoWindow();

    // Kick off an initial search once map has loaded.
    google.maps.event.addListenerOnce(innerMap, 'idle', () => {
        nearbySearch();
    });
}

async function nearbySearch() {
    const { Place, SearchNearbyRankPreference } = await google.maps.importLibrary('places') as google.maps.PlacesLibrary;
    const { AdvancedMarkerElement } = await google.maps.importLibrary("marker") as google.maps.MarkerLibrary;
    const { spherical } = await google.maps.importLibrary('geometry') as google.maps.GeometryLibrary;
    // Get bounds and radius to constrain search.
    center = mapElement.center;
    let bounds = innerMap.getBounds();
    const ne = bounds.getNorthEast();
    const sw = bounds.getSouthWest();
    const diameter = spherical.computeDistanceBetween(ne, sw);
    const radius = Math.min((diameter / 2), 50000); // Radius cannot be more than 50000.

    const request = {
        // required parameters
        fields: ['displayName', 'location', 'formattedAddress', 'googleMapsURI'],
        locationRestriction: {
            center,
            radius,
        },
        // optional parameters
        includedPrimaryTypes: [typeSelect.value],
        maxResultCount: 5,
        rankPreference: SearchNearbyRankPreference.POPULARITY,
    };

    const { places } = await Place.searchNearby(request);

    if (places.length) {
        const { LatLngBounds } = await google.maps.importLibrary("core") as google.maps.CoreLibrary;
        const bounds = new LatLngBounds();

        // First remove all existing markers.
        for (const marker of mapElement.querySelectorAll('gmp-advanced-marker')) marker.remove();

        // Loop through and get all the results.
        places.forEach(place => {
            if (!place.location) return;
            bounds.extend(place.location);

            const marker = new AdvancedMarkerElement({
                map: innerMap,
                position: place.location,
                title: place.displayName,
            });

            // Build the content of the InfoWindow safely using DOM elements.
            const content = document.createElement('div');
            const address = document.createElement('div');
            address.textContent = place.formattedAddress || '';
            const placeId = document.createElement('div');
            placeId.textContent = place.id;
            content.append(address, placeId);

            if (place.googleMapsURI) {
                const link = document.createElement('a');
                link.href = place.googleMapsURI;
                link.target = '_blank';
                link.textContent = 'View Details on Google Maps';
                content.appendChild(link);
            }

            marker.addListener('gmp-click', () => {
                innerMap.panTo(place.location);
                updateInfoWindow(place.displayName, content, marker);
            });
        });

        innerMap.fitBounds(bounds, 100);

    } else {
        console.log('No results');
    }
}

function updateInfoWindow(title, content, anchor) {
    infoWindow.setContent(content);
    infoWindow.setHeaderContent(title);
    infoWindow.open({
        anchor,
    });
}

initMap();
index.ts

JavaScript

const mapElement = document.querySelector('gmp-map');
let innerMap;
const advancedMarkerElement = document.querySelector('gmp-advanced-marker');
let center;
let typeSelect;
let infoWindow;
async function initMap() {
    const { Map, InfoWindow } = await google.maps.importLibrary('maps');
    const { LatLng } = await google.maps.importLibrary("core");
    innerMap = mapElement.innerMap;
    innerMap.setOptions({
        mapTypeControl: false,
    });
    typeSelect = document.querySelector(".type-select");
    typeSelect.addEventListener('change', () => {
        nearbySearch();
    });
    infoWindow = new InfoWindow();
    // Kick off an initial search once map has loaded.
    google.maps.event.addListenerOnce(innerMap, 'idle', () => {
        nearbySearch();
    });
}
async function nearbySearch() {
    const { Place, SearchNearbyRankPreference } = await google.maps.importLibrary('places');
    const { AdvancedMarkerElement } = await google.maps.importLibrary("marker");
    const { spherical } = await google.maps.importLibrary('geometry');
    // Get bounds and radius to constrain search.
    center = mapElement.center;
    let bounds = innerMap.getBounds();
    const ne = bounds.getNorthEast();
    const sw = bounds.getSouthWest();
    const diameter = spherical.computeDistanceBetween(ne, sw);
    const radius = Math.min((diameter / 2), 50000); // Radius cannot be more than 50000.
    const request = {
        // required parameters
        fields: ['displayName', 'location', 'formattedAddress', 'googleMapsURI'],
        locationRestriction: {
            center,
            radius,
        },
        // optional parameters
        includedPrimaryTypes: [typeSelect.value],
        maxResultCount: 5,
        rankPreference: SearchNearbyRankPreference.POPULARITY,
    };
    const { places } = await Place.searchNearby(request);
    if (places.length) {
        const { LatLngBounds } = await google.maps.importLibrary("core");
        const bounds = new LatLngBounds();
        // First remove all existing markers.
        for (const marker of mapElement.querySelectorAll('gmp-advanced-marker'))
            marker.remove();
        // Loop through and get all the results.
        places.forEach(place => {
            if (!place.location)
                return;
            bounds.extend(place.location);
            const marker = new AdvancedMarkerElement({
                map: innerMap,
                position: place.location,
                title: place.displayName,
            });
            // Build the content of the InfoWindow safely using DOM elements.
            const content = document.createElement('div');
            const address = document.createElement('div');
            address.textContent = place.formattedAddress || '';
            const placeId = document.createElement('div');
            placeId.textContent = place.id;
            content.append(address, placeId);
            if (place.googleMapsURI) {
                const link = document.createElement('a');
                link.href = place.googleMapsURI;
                link.target = '_blank';
                link.textContent = 'View Details on Google Maps';
                content.appendChild(link);
            }
            marker.addListener('gmp-click', () => {
                innerMap.panTo(place.location);
                updateInfoWindow(place.displayName, content, marker);
            });
        });
        innerMap.fitBounds(bounds, 100);
    }
    else {
        console.log('No results');
    }
}
function updateInfoWindow(title, content, anchor) {
    infoWindow.setContent(content);
    infoWindow.setHeaderContent(title);
    infoWindow.open({
        anchor,
    });
}
initMap();
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%;
}

#map-container {
  display: flex;
  flex-direction: row;
  height: 100%;
}

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

.type-select {
    width: 400px;
    height: 32px;
    border: 1px solid #000;
    border-radius: 10px;
    flex-grow: 1;
    padding: 0 10px;
    margin-left: 10px;
    margin-top: 10px;
  }

style.css

HTML

<html>

<head>
  <title>Nearby Search</title>

  <link rel="stylesheet" type="text/css" href="./style.css" />
  <script type="module" src="./index.js"></script>
  <!-- prettier-ignore -->
  <script>(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: "AIzaSyA6myHzS10YXdcazAFalmXvDkrYCp5cLc8", v: "beta" });</script>
</head>

<body>
  <gmp-map center="45.438646,12.327573" zoom="14" map-id="DEMO_MAP_ID"><!-- Map id is required for Advanced Markers. -->
    <gmp-advanced-marker></gmp-advanced-marker>
    <div id="controls" slot="control-inline-start-block-start">
      <select name="types" class="type-select">
        <option value="cafe" selected>Cafe</option>
        <option value="restaurant">Restaurant</option>
        <option value="museum">Museum</option>
        <option value="monument">Monument</option>
        <option value="park">Park</option>
      </select>
    </div>
  </gmp-map>
</body>

</html>
index.html

試用範例