Google Maps

Google Maps API

Summary

Map types
google.maps.MapTypeId.ROADMAP|SATELLITE|HYBRID|TERRAIN
new google.maps.LatLng

Creating maps
new google.maps.Map(document.getElementById("map"), mapOptions)

LAYERS

google.maps.TrafficLayer(
google.maps.visualization.HeatmapLayer(

Adding transit layer to map
new google.maps.TransitLayer(); transitLayer.setMap(map);

Data layer

Adding data to data  layer
map.data.add({geometry: new google.maps.Data.Polygon([outerCoords, innerCoords1, innerCoords2])}

map.data.loadGeoJson('https://storage.googleapis.com/mapsdevsite/json/google.json');

Setting styles

map.data.setStyle({
  icon: '//example.com/path/to/image.png',
  fillColor: 'green'
});

//when the user clicks ,set 'isColorful',changing the color of the letters

  map.data.addListener('click', function(event) {
          event.feature.setProperty('isColorful', true);
        });






map.data.addListener('mouseover', function(event) {
          map.data.revertStyle();
          map.data.overrideStyle(event.feature, {strokeWeight: 8});
        });






map.data.addListener('mouseout', function(event) {
          map.data.revertStyle();
        });

TRAFFIC LAYER

 function initMap() {
        var map = new google.maps.Map(document.getElementById('map'), {
          zoom: 13,
          center: {lat: 34.04924594193164, lng: -118.24104309082031}
        });
        var trafficLayer = new google.maps.TrafficLayer();
        trafficLayer.setMap(map);
      }

HEAT MAPS

     var map, heatmap;

      function initMap() {
        map = new google.maps.Map(document.getElementById('map'), {
          zoom: 13,
          center: {lat: 37.775, lng: -122.434},
          mapTypeId: 'satellite'
        });

        heatmap = new google.maps.visualization.HeatmapLayer({
          data: getPoints(),
          map: map
        });
      }

heatmap.setMap(heatmap.getMap() ? null : map); 
heatmap.set('gradient', heatmap.get('gradient') ? null : gradient);
heatmap.set('radius', heatmap.get('radius') ? null : 20);
heatmap.set('opacity', heatmap.get('opacity') ? null : 0.2);



FUSION TABLES:

 A Google Fusion Table is a database table where each row contains data about a particular feature; for geographic data, each row within a Google Fusion Table additionally contains location data, holding a feature’s positional information.

function initMap() {
  var map = new google.maps.Map(document.getElementById('map'), {
    center: {lat: -25, lng: 133},
    zoom: 4
  });

  var layer = new google.maps.FusionTablesLayer({
    query: {
      select: 'geometry',
      from: '1ertEwm-1bMBhpEwHhtNYT47HQ9k2ki_6sRa-UQ'
    },
    styles: [{
      polygonOptions: {
        fillColor: '#00FF00',
        fillOpacity: 0.3
      }
    }, {
      where: 'birds > 300',
      polygonOptions: {
        fillColor: '#0000FF'
      }
    }, {
      where: 'population > 5',
      polygonOptions: {
        fillOpacity: 1.0
      }
    }]
  });
  layer.setMap(map);
}

GeoRSS Layers

function initMap() {
        var map = new google.maps.Map(document.getElementById('map'), {
          zoom: 4,
          center: {lat: 49.496675, lng: -102.65625}
        });

        var georssLayer = new google.maps.KmlLayer({
          url: 'http://api.flickr.com/services/feeds/geo/?g=322338@N20&lang=en-us&format=feed-georss'
        });
        georssLayer.setMap(map);
      }

MAP TYPES

WEB FEED: A web feed (or news feed) is a data format used for providing users with frequently updated content.

KML feature details

Because KML may include a large number of features, you may not access feature data from the KmlLayer object directly. Instead, as features are displayed, they are rendered to look like clickable Maps JavaScript API overlays. Clicking on individual features, by default, brings up an InfoWindow containing KML 

    name="viewport" content="initial-scale=1.0">
    charset="utf-8">
   
 
 
   

id="map">

   
   
 

Maps

Map class

google.maps.Map class

This class extends MVCObject.

Constructor
Map	Map(mapDiv[, opts]) Parameters: mapDiv:  Element opts (optional):  MapOptions Creates a new map inside of the given HTML container, which is typically a DIV element.

Methods
fitBounds	fitBounds(bounds[, padding]) Parameters: bounds:  LatLngBounds|LatLngBoundsLiteral padding (optional):  number|Padding Return Value:  None Sets the viewport to contain the given bounds. Note: When the map is set to display: none, the fitBounds function reads the map's size as 0x0, and therefore does not do anything. To change the viewport while the map is hidden, set the map to visibility: hidden, thereby ensuring the map div has an actual size.
getBounds	getBounds() Parameters:  None Return Value:  LatLngBounds Returns the lat/lng bounds of the current viewport. If more than one copy of the world is visible, the bounds range in longitude from -180 to 180 degrees inclusive. If the map is not yet initialized (i.e. the mapType is still null), or center and zoom have not been set then the result is null or undefined.
getCenter	getCenter() Parameters:  None Return Value:  LatLng Returns the position displayed at the center of the map. Note that this LatLng object is notwrapped. See LatLng for more information.
getClickableIcons	getClickableIcons() Parameters:  None Return Value:  boolean Returns the clickability of the map icons. A map icon represents a point of interest, also known as a POI. If the returned value is true, then the icons are clickable on the map.
getDiv	getDiv() Parameters:  None Return Value:  Element
getHeading	getHeading() Parameters:  None Return Value:  number Returns the compass heading of aerial imagery. The heading value is measured in degrees (clockwise) from cardinal direction North.
getMapTypeId	getMapTypeId() Parameters:  None Return Value:  MapTypeId|string
getProjection	getProjection() Parameters:  None Return Value:  Projection Returns the current Projection. If the map is not yet initialized (i.e. the mapType is still null) then the result is null. Listen to projection_changed and check its value to ensure it is not null.
getStreetView	getStreetView() Parameters:  None Return Value:  StreetViewPanorama Returns the default StreetViewPanorama bound to the map, which may be a default panorama embedded within the map, or the panorama set using setStreetView(). Changes to the map's streetViewControl will be reflected in the display of such a bound panorama.
getTilt	getTilt() Parameters:  None Return Value:  number Returns the current angle of incidence of the map, in degrees from the viewport plane to the map plane. The result will be 0 for imagery taken directly overhead or 45 for 45° imagery. 45° imagery is only available for satellite and hybrid map types, within some locations, and at some zoom levels. Note: This method does not return the value set by setTilt. See setTilt for details.
getZoom	getZoom() Parameters:  None Return Value:  number
panBy	panBy(x, y) Parameters: x:  number y:  number Return Value:  None Changes the center of the map by the given distance in pixels. If the distance is less than both the width and height of the map, the transition will be smoothly animated. Note that the map coordinate system increases from west to east (for x values) and north to south (for y values).
panTo	panTo(latLng) Parameters: latLng:  LatLng|LatLngLiteral Return Value:  None Changes the center of the map to the given LatLng. If the change is less than both the width and height of the map, the transition will be smoothly animated.
panToBounds	panToBounds(latLngBounds[, padding]) Parameters: latLngBounds:  LatLngBounds|LatLngBoundsLiteral padding (optional):  number|Padding Return Value:  None Pans the map by the minimum amount necessary to contain the given LatLngBounds. It makes no guarantee where on the map the bounds will be, except that the map will be panned to show as much of the bounds as possible inside {currentMapSizeInPx} - {padding}.
setCenter	setCenter(latlng) Parameters: latlng:  LatLng|LatLngLiteral Return Value:  None
setClickableIcons	setClickableIcons(value) Parameters: value:  boolean Return Value:  None Controls whether the map icons are clickable or not. A map icon represents a point of interest, also known as a POI. To disable the clickability of map icons, pass a value of false to this method.
setHeading	setHeading(heading) Parameters: heading:  number Return Value:  None Sets the compass heading for aerial imagery measured in degrees from cardinal direction North.
setMapTypeId	setMapTypeId(mapTypeId) Parameters: mapTypeId:  MapTypeId|string Return Value:  None
setOptions	setOptions(options) Parameters: options:  MapOptions Return Value:  None
setStreetView	setStreetView(panorama) Parameters: panorama:  StreetViewPanorama Return Value:  None Binds a StreetViewPanorama to the map. This panorama overrides the default StreetViewPanorama, allowing the map to bind to an external panorama outside of the map. Setting the panorama to null binds the default embedded panorama back to the map.
setTilt	setTilt(tilt) Parameters: tilt:  number Return Value:  None Controls the automatic switching behavior for the angle of incidence of the map. The only allowed values are 0 and 45. setTilt(0) causes the map to always use a 0° overhead view regardless of the zoom level and viewport. setTilt(45) causes the tilt angle to automatically switch to 45 whenever 45° imagery is available for the current zoom level and viewport, and switch back to 0 whenever 45° imagery is not available (this is the default behavior). 45° imagery is only available for satellite and hybrid map types, within some locations, and at some zoom levels. Note:getTilt returns the current tilt angle, not the value set by setTilt. Because getTilt and setTilt refer to different things, do not bind() the tilt property; doing so may yield unpredictable effects.
setZoom	setZoom(zoom) Parameters: zoom:  number Return Value:  None

Properties
controls	Type:  Array<MVCArray> Additional controls to attach to the map. To add a control to the map, add the control's   to the MVCArray corresponding to the ControlPosition where it should be rendered.
data	Type:  Data An instance of Data, bound to the map. Add features to this Data object to conveniently display them on this map.
mapTypes	Type:  MapTypeRegistry A registry of MapType instances by string ID.
overlayMapTypes	Type:  MVCArray<MapType> Additional map types to overlay. Overlay map types will display on top of the base map they are attached to, in the order in which they appear in the overlayMapTypes array (overlays with higher index values are displayed in front of overlays with lower index values).

Events
bounds_changed	function() Arguments:  None This event is fired when the viewport bounds have changed.
center_changed	function() Arguments:  None This event is fired when the map center property changes.
click	function(event) Arguments: event:  MouseEvent|IconMouseEvent This event is fired when the user clicks on the map. An ApiMouseEvent with properties for the clicked location is returned unless a place icon was clicked, in which case an IconMouseEvent with a placeid is returned. IconMouseEvent and ApiMouseEvent are identical, except that IconMouseEvent has the placeid field. The event can always be treated as an ApiMouseEvent when the placeid is not important. The click event is not fired if a marker or infowindow was clicked.
dblclick	function(event) Arguments: event:  MouseEvent This event is fired when the user double-clicks on the map. Note that the click event will also fire, right before this one.
drag	function() Arguments:  None This event is repeatedly fired while the user drags the map.
dragend	function() Arguments:  None This event is fired when the user stops dragging the map.
dragstart	function() Arguments:  None This event is fired when the user starts dragging the map.
heading_changed	function() Arguments:  None This event is fired when the map heading property changes.
idle	function() Arguments:  None This event is fired when the map becomes idle after panning or zooming.
maptypeid_changed	function() Arguments:  None This event is fired when the mapTypeId property changes.
mousemove	function(event) Arguments: event:  MouseEvent This event is fired whenever the user's mouse moves over the map container.
mouseout	function(event) Arguments: event:  MouseEvent This event is fired when the user's mouse exits the map container.
mouseover	function(event) Arguments: event:  MouseEvent This event is fired when the user's mouse enters the map container.
projection_changed	function() Arguments:  None This event is fired when the projection has changed.
rightclick	function(event) Arguments: event:  MouseEvent This event is fired when the DOM contextmenu event is fired on the map container.
tilesloaded	function() Arguments:  None This event is fired when the visible tiles have finished loading.
tilt_changed	function() Arguments:  None This event is fired when the map tilt property changes.
zoom_changed	function() Arguments:  None This event is fired when the map zoom property changes.

MapOptions interface

google.maps.MapOptions interface

MapOptions object used to define the properties that can be set on a Map.

Properties
backgroundColor	Type:  string Color used for the background of the Map div. This color will be visible when tiles have not yet loaded as the user pans. This option can only be set when the map is initialized.
center	Type:  LatLng|LatLngLiteral The initial Map center. Required.
clickableIcons	Type:  boolean When false, map icons are not clickable. A map icon represents a point of interest, also known as a POI. By default map icons are clickable.
disableDefaultUI	Type:  boolean Enables/disables all default UI. May be overridden individually.
disableDoubleClickZoom	Type:  boolean Enables/disables zoom and center on double click. Enabled by default. Note: This property is not recommended. To disable zooming on double click, you can use the gestureHandling property, and set it to "none".
draggable	Type:  boolean If false, prevents the map from being dragged. Dragging is enabled by default. Note: This property is deprecated. To disable dragging on the map, you can use the gestureHandling property, and set it to "none".
draggableCursor	Type:  string The name or url of the cursor to display when mousing over a draggable map. This property uses the css cursor attribute to change the icon. As with the css property, you must specify at least one fallback cursor that is not a URL. For example: draggableCursor: 'url(http://www.example.com/icon.png), auto;'.
draggingCursor	Type:  string The name or url of the cursor to display when the map is being dragged. This property uses the css cursor attribute to change the icon. As with the css property, you must specify at least one fallback cursor that is not a URL. For example: draggingCursor: 'url(http://www.example.com/icon.png), auto;'.
fullscreenControl	Type:  boolean The enabled/disabled state of the Fullscreen control.
fullscreenControlOptions	Type:  FullscreenControlOptions The display options for the Fullscreen control.
gestureHandling	Type:  string This setting controls how the API handles gestures on the map. Allowed values: "cooperative": Scroll events and one-finger touch gestures scroll the page, and do not zoom or pan the map. Two-finger touch gestures pan and zoom the map. Scroll events with a ctrl key or ⌘ key pressed zoom the map. In this mode the map cooperates with the page. "greedy": All touch gestures and scroll events pan or zoom the map. "none": The map cannot be panned or zoomed by user gestures. "auto": (default) Gesture handling is either cooperative or greedy, depending on whether the page is scrollable or in an iframe.
heading	Type:  number The heading for aerial imagery in degrees measured clockwise from cardinal direction North. Headings are snapped to the nearest available angle for which imagery is available.
keyboardShortcuts	Type:  boolean If false, prevents the map from being controlled by the keyboard. Keyboard shortcuts are enabled by default.
mapTypeControl	Type:  boolean The initial enabled/disabled state of the Map type control.
mapTypeControlOptions	Type:  MapTypeControlOptions The initial display options for the Map type control.
mapTypeId	Type:  MapTypeId|string The initial Map mapTypeId. Defaults to ROADMAP.
maxZoom	Type:  number The maximum zoom level which will be displayed on the map. If omitted, or set to null, the maximum zoom from the current map type is used instead. Valid values: Integers between zero, and up to the supported maximum zoom level.
minZoom	Type:  number The minimum zoom level which will be displayed on the map. If omitted, or set to null, the minimum zoom from the current map type is used instead. Valid values: Integers between zero, and up to the supported maximum zoom level.
noClear	Type:  boolean If true, do not clear the contents of the Map div.
panControl	Type:  boolean The enabled/disabled state of the Pan control. Note: The Pan control is not available in the new set of controls introduced in v3.22 of the Google Maps JavaScript API. While using v3.22 and v3.23, you can choose to use the earlier set of controls rather than the new controls, thus making the Pan control available as part of the old control set. See What's New in the v3.22 Map Controls.
panControlOptions	Type:  PanControlOptions The display options for the Pan control. Note: The Pan control is not available in the new set of controls introduced in v3.22 of the Google Maps JavaScript API. While using v3.22 and v3.23, you can choose to use the earlier set of controls rather than the new controls, thus making the Pan control available as part of the old control set. See What's New in the v3.22 Map Controls.
rotateControl	Type:  boolean The enabled/disabled state of the Rotate control.
rotateControlOptions	Type:  RotateControlOptions The display options for the Rotate control.
scaleControl	Type:  boolean The initial enabled/disabled state of the Scale control.
scaleControlOptions	Type:  ScaleControlOptions The initial display options for the Scale control.
scrollwheel	Type:  boolean If false, disables zooming on the map using a mouse scroll wheel. The scrollwheel is enabled by default. Note: This property is not recommended. To disable zooming using scrollwheel, you can use the gestureHandling property, and set it to either "cooperative" or "none".
streetView	Type:  StreetViewPanorama A StreetViewPanorama to display when the Street View pegman is dropped on the map. If no panorama is specified, a default StreetViewPanorama will be displayed in the map's div when the pegman is dropped.
streetViewControl	Type:  boolean The initial enabled/disabled state of the Street View Pegman control. This control is part of the default UI, and should be set to false when displaying a map type on which the Street View road overlay should not appear (e.g. a non-Earth map type).
streetViewControlOptions	Type:  StreetViewControlOptions The initial display options for the Street View Pegman control.
styles	Type:  Array<MapTypeStyle> Styles to apply to each of the default map types. Note that for satellite/hybrid and terrainmodes, these styles will only apply to labels and geometry.
tilt	Type:  number Controls the automatic switching behavior for the angle of incidence of the map. The only allowed values are 0 and 45. The value 0 causes the map to always use a 0° overhead view regardless of the zoom level and viewport. The value 45 causes the tilt angle to automatically switch to 45 whenever 45° imagery is available for the current zoom level and viewport, and switch back to 0 whenever 45° imagery is not available (this is the default behavior). 45° imagery is only available for satellite and hybrid map types, within some locations, and at some zoom levels. Note:getTilt returns the current tilt angle, not the value specified by this option. Because getTiltand this option refer to different things, do not bind() the tilt property; doing so may yield unpredictable effects.
zoom	Type:  number The initial Map zoom level. Required. Valid values: Integers between zero, and up to the supported maximum zoom level.
zoomControl	Type:  boolean The enabled/disabled state of the Zoom control.
zoomControlOptions	Type:  ZoomControlOptions The display options for the Zoom control.

MapTypeStyle interface

google.maps.MapTypeStyle interface

The MapTypeStyle is a collection of selectors and stylers that define how the map should be styled. Selectors specify the map features and/or elements that should be affected, and stylers specify how those features and elements should be modified. For details, see the style reference.

Properties
elementType	Type:  string The element to which a styler should be applied. An element is a visual aspect of a feature on the map. Example: a label, an icon, the stroke or fill applied to the geometry, and more. Optional. If elementType is not specified, the value is assumed to be 'all'. For details of usage and allowed values, see the style reference.
featureType	Type:  string The feature, or group of features, to which a styler should be applied. Optional. If featureType is not specified, the value is assumed to be 'all'. For details of usage and allowed values, see the style reference.
stylers	Type:  Array The style rules to apply to the selected map features and elements. The rules are applied in the order that you specify in this array. For guidelines on usage and allowed values, see the style reference.

MouseEvent interface

google.maps.MouseEvent interface

This object is returned from various mouse events on the map and overlays, and contains all the fields shown below.

Methods
stop	stop() Parameters:  None Return Value:  None Prevents this event from propagating further.

Properties
latLng	Type:  LatLng The latitude/longitude that was below the cursor when the event occurred.

IconMouseEvent interface

google.maps.IconMouseEvent interface

This object is sent in an event when a user clicks on an icon on the map. The place ID of this place is stored in the placeId member. To prevent the default info window from showing up, call the stop() method on this event to prevent it being propagated. Learn more about place IDs in the Places API developer guide.

This interface extends MouseEvent.

Properties
placeId	Type:  string The place ID of the place that was clicked. This place ID can be used to query more information about the feature that was clicked. Learn more about place IDs in the Places API developer guide.

MapTypeId constants

google.maps.MapTypeId constants

Identifiers for common MapTypes. Specify these by value, or by using the constant's name. For example, 'satellite'or google.maps.MapTypeId.SATELLITE.

Constants
HYBRID	This map type displays a transparent layer of major streets on satellite images.
ROADMAP	This map type displays a normal street map.
SATELLITE	This map type displays satellite images.
TERRAIN	This map type displays maps with physical features such as terrain and vegetation.

MapTypeRegistry class

google.maps.MapTypeRegistry class

A registry for MapType instances, keyed by MapType id.

This class extends MVCObject.

Constructor
MapTypeRegistry	MapTypeRegistry() Parameters:  None The MapTypeRegistry holds the collection of custom map types available to the map for its use. The API consults this registry when providing the list of avaiable map types within controls, for example.

Methods
set	set(id, mapType) Parameters: id:  string mapType:  MapType|* Return Value:  None Sets the registry to associate the passed string identifier with the passed MapType.

TrafficLayer class

google.maps.TrafficLayer

google.maps.TrafficLayerOptions

google.maps.TransitLayer

google.maps.BicyclingLayer

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