I have a form I'm using to capture a location (Place ID) on a Google map.

I'm using Google's Place ID selector. Code is below or here

code snippet:

// This sample uses the Place Autocomplete widget to allow the user to search
// for and select a place. The sample then displays an info window containing
// the place ID and other information about the place that the user has
// selected.

// This example requires the Places library. Include the libraries=places
// parameter when you first load the API. For example:
// <script src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&libraries=places">

function initMap() {
  var map = new google.maps.Map(document.getElementById('map'));
  const request = {
    placeId: "ChIJaXQRs6lZwokRY6EFpJnhNNE", // Empire State Building
    fields: ["name", "formatted_address", "place_id", "geometry"],
  };
  const service = new google.maps.places.PlacesService(map);

  service.getDetails(request, (place, status) => {
    if (
      status === google.maps.places.PlacesServiceStatus.OK &&
      place &&
      place.geometry &&
      place.geometry.location
    ) {
      // map.setCenter(place.geometry.location),
      map.fitBounds(place.geometry.viewport)
      // Set the position of the marker using the place ID and location.
      marker.setPlace({
        placeId: place.place_id,
        location: place.geometry.location
      });
      marker.setVisible(true);

      infowindow.setContent('<div><strong>'   place.name   '</strong><br>'  
        'Place ID: '   place.place_id   '<br>'  
        place.formatted_address);
      infowindow.open(map, marker);
    }
  });

  var input = document.getElementById('pac-input');

  var autocomplete = new google.maps.places.Autocomplete(input);
  autocomplete.bindTo('bounds', map);

  map.controls[google.maps.ControlPosition.TOP_LEFT].push(input);

  var infowindow = new google.maps.InfoWindow();
  var marker = new google.maps.Marker({
    map: map
  });
  marker.addListener('click', function() {
    infowindow.open(map, marker);
  });

  autocomplete.addListener('place_changed', function() {
    infowindow.close();
    var place = autocomplete.getPlace();
    if (!place.geometry) {
      return;
    }

    if (place.geometry.viewport) {
      map.fitBounds(place.geometry.viewport);
    } else {
      map.setCenter(place.geometry.location);
      map.setZoom(17);
    }

    // Set the position of the marker using the place ID and location.
    marker.setPlace({
      placeId: place.place_id,
      location: place.geometry.location
    });
    marker.setVisible(true);

    infowindow.setContent('<div><strong>'   place.name   '</strong><br>'  
      'Place ID: '   place.place_id   '<br>'  
      place.formatted_address);
    infowindow.open(map, marker);
  });
}

html,
body {
  height: 100%;
  margin: 0;
  padding: 0;
}

#map {
  height: 100%;
}

.controls {
  background-color: #fff;
  border-radius: 2px;
  border: 1px solid transparent;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
  box-sizing: border-box;
  font-family: Roboto;
  font-size: 15px;
  font-weight: 300;
  height: 29px;
  margin-left: 17px;
  margin-top: 10px;
  outline: none;
  padding: 0 11px 0 13px;
  text-overflow: ellipsis;
  width: 400px;
}

.controls:focus {
  border-color: #4d90fe;
}

<input id="pac-input"  type="text" placeholder="Enter a location">
<div id="map"></div>
<!-- Replace the value of the key parameter with your own API key. -->
<script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk&libraries=places&callback=initMap" async defer></script>