Ricerca nelle vicinanze

Seleziona la piattaforma:Android iOS JavaScript Servizio web
Sviluppatori dello Spazio economico europeo (SEE)

Nearby Search (New) accetta uno o più tipi di luoghi e restituisce un elenco di luoghi corrispondenti. Nell'esempio seguente, puoi scegliere un tipo di luogo e visualizzare i risultati su una mappa. Fai clic sugli indicatori per visualizzare ulteriori dettagli sui luoghi.

Nearby Search (novità) restituisce informazioni su un insieme di luoghi in base ai tipi di luoghi specificati, ad esempio restaurant, book_store o bowling_alley. Il servizio risponde con un elenco di luoghi corrispondenti ai tipi di luoghi specificati entro il raggio del locationRestriction specificato.

Per utilizzare Nearby Search (New), devi abilitare "API Places (New)" nel tuo progetto Google Cloud. Per maggiori dettagli, consulta Inizia.

Trova luoghi nelle vicinanze

Chiama searchNearby() per restituire un elenco di luoghi in base ai tipi di luoghi, alla località e al raggio specificati. Specifica i parametri di ricerca utilizzando una richiesta, quindi chiama searchNearby(). I risultati vengono restituiti come un elenco di oggetti Place, da cui puoi ottenere i Place Details. Il seguente snippet mostra un esempio di richiesta e una chiamata a searchNearby():

TypeScript

// Get bounds and radius to constrain search.
center = mapElement.center!;
const ne = innerMap.getBounds()!.getNorthEast();
const sw = innerMap.getBounds()!.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);

JavaScript

// Get bounds and radius to constrain search.
center = mapElement.center;
const ne = innerMap.getBounds().getNorthEast();
const sw = innerMap.getBounds().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);
  • Utilizza il parametro fields (obbligatorio) per specificare un elenco separato da virgole di uno o più campi di dati.
  • Utilizza il parametro locationRestriction (obbligatorio) per specificare un raggio fino a 50.000 metri.
  • Utilizza il parametro includedPrimaryTypes per specificare uno o più tipi di luoghi da cercare.
  • Utilizza il parametro rankPreference per specificare un SearchNearbyRankPreference di POPULARITY o DISTANCE.
  • Consulta l'elenco completo dei parametri.

Esempio

L'esempio seguente utilizza searchNearby() per eseguire query sui luoghi del tipo selezionato all'interno dei limiti della mappa e compila una mappa con indicatori per mostrare i risultati.

TypeScript

const mapElement = document.querySelector('gmp-map')!;
let innerMap: google.maps.Map;
let center: google.maps.LatLngLiteral | google.maps.LatLng;
let typeSelect: HTMLSelectElement;
let infoWindow: google.maps.InfoWindow;

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

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

    typeSelect = document.querySelector('.type-select')!;

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

    infoWindow = new InfoWindow();

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

async function nearbySearch() {
    const [
        { Place, SearchNearbyRankPreference },
        { AdvancedMarkerElement },
        { spherical },
    ] = await Promise.all([
        google.maps.importLibrary('places'),
        google.maps.importLibrary('marker'),
        google.maps.importLibrary('geometry'),
    ]);
    // Get bounds and radius to constrain search.
    center = mapElement.center!;
    const ne = innerMap.getBounds()!.getNorthEast();
    const sw = innerMap.getBounds()!.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,
                gmpClickable: true,
            });

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

        innerMap.fitBounds(bounds, 100);
    } else {
        console.log('No results');
    }
}

function updateInfoWindow(
    title: string | Element | null,
    content: string | Element | null,
    anchor: google.maps.marker.AdvancedMarkerElement
) {
    infoWindow.setContent(content);
    infoWindow.setHeaderContent(title);
    infoWindow.open({
        anchor,
    });
}

void init();

JavaScript

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

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

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

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

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

    infoWindow = new InfoWindow();

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

async function nearbySearch() {
    const [
        { Place, SearchNearbyRankPreference },
        { AdvancedMarkerElement },
        { spherical },
    ] = await Promise.all([
        google.maps.importLibrary('places'),
        google.maps.importLibrary('marker'),
        google.maps.importLibrary('geometry'),
    ]);
    // Get bounds and radius to constrain search.
    center = mapElement.center;
    const ne = innerMap.getBounds().getNorthEast();
    const sw = innerMap.getBounds().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,
                gmpClickable: true,
            });

            // 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.addEventListener('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,
    });
}

void init();

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;
}

HTML

<html>
    <head>
        <title>Nearby Search</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="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>