引言
您可以使用標記代表地圖上的位置。標記預設會使用標準圖片,不過,標記可以顯示自訂圖片,而這種標記通常稱為「圖示」。標記和圖示是 Marker
類型的物件。您可以在標記的建構函式內設定自訂圖示,或是針對標記呼叫 setIcon()
。進一步瞭解如何自訂標記圖片。
概括而言,標記是一種疊加層。如要瞭解其他類型的疊加層,請參閱「在地圖上繪圖」一文。
使用者可以與標記互動。舉例來說,標記預設會接收 'click'
事件,因此您可以加入事件監聽器,以在事件發生時開啟資訊視窗並顯示自訂資訊。您可以將標記的 draggable
屬性設為 true
,允許使用者移動地圖上的標記。如要進一步瞭解可拖曳的標記,請參閱下文。
加入標記
google.maps.Marker
建構函式會使用單一 Marker options
物件常值來指定標記的初始屬性。
下列欄位特別重要,通常是在建立標記時設定:
-
position
(必要) 會指定LatLng
來識別標記的起始位置。如要擷取LatLng
,其中一項方法是使用地理編碼服務。 -
map
(選用) 會指定要加入標記的Map
。如果您在建立標記時不指定地圖,這個標記就不會附加到 (或顯示在) 地圖上。如果之後要新增標記,您可以呼叫標記的setMap()
方法。
以下範例說明如何為澳洲中心點 Uluru 的地圖新增簡易標記:
TypeScript
function initMap(): void { const myLatLng = { lat: -25.363, lng: 131.044 }; const map = new google.maps.Map( document.getElementById("map") as HTMLElement, { zoom: 4, center: myLatLng, } ); new google.maps.Marker({ position: myLatLng, map, title: "Hello World!", }); } declare global { interface Window { initMap: () => void; } } window.initMap = initMap;
JavaScript
function initMap() { const myLatLng = { lat: -25.363, lng: 131.044 }; const map = new google.maps.Map(document.getElementById("map"), { zoom: 4, center: myLatLng, }); new google.maps.Marker({ position: myLatLng, map, title: "Hello World!", }); } window.initMap = initMap;
測試範例程式碼
上例使用標記選項中的 map
屬性,在建立標記時將標記加進地圖。或者,您也可以使用標記的 setMap()
方法,直接將標記加進地圖,如下例所示:
var myLatlng = new google.maps.LatLng(-25.363882,131.044922); var mapOptions = { zoom: 4, center: myLatlng } var map = new google.maps.Map(document.getElementById("map"), mapOptions); var marker = new google.maps.Marker({ position: myLatlng, title:"Hello World!" }); // To add the marker to the map, call setMap(); marker.setMap(map);
The marker's title
will appear as a tooltip.
If you do not wish to pass any Marker options
in the
marker's constructor, instead pass an empty object {}
in the
last argument of the constructor.
Remove a marker
To remove a marker from the map, call the setMap()
method
passing null
as the argument.
marker.setMap(null);
Note that the above method does not delete the marker. It removes the
marker from the map. If instead you wish to delete the marker, you should
remove it from the map, and then set the marker itself to
null
.
If you wish to manage a set of markers, you should create an array to hold
the markers. Using this array, you can then call setMap()
on
each marker in the array in turn when you need to remove the markers. You
can delete the markers by removing them from the map and then setting the
array's length
to 0
, which removes all
references to the markers.
Customize a marker image
You can customize the visual appearance of markers by specifying an image file or vector-based icon to display instead of the default Google Maps pushpin icon. You can add text with a marker label, and use complex icons to define clickable regions, and set the stack order of markers.
Markers with image icons
In the most basic case, an icon can specify an image to use instead of the
default Google Maps pushpin icon. To specify such an icon, set the
marker's icon
property to the URL of an image. The Maps JavaScript API will size the icon automatically.
TypeScript
// This example adds a marker to indicate the position of Bondi Beach in Sydney, // Australia. function initMap(): void { const map = new google.maps.Map( document.getElementById("map") as HTMLElement, { zoom: 4, center: { lat: -33, lng: 151 }, } ); const image = "https://developers.google.com/maps/documentation/javascript/examples/full/images/beachflag.png"; const beachMarker = new google.maps.Marker({ position: { lat: -33.89, lng: 151.274 }, map, icon: image, }); } declare global { interface Window { initMap: () => void; } } window.initMap = initMap;
JavaScript
// This example adds a marker to indicate the position of Bondi Beach in Sydney, // Australia. function initMap() { const map = new google.maps.Map(document.getElementById("map"), { zoom: 4, center: { lat: -33, lng: 151 }, }); const image = "https://developers.google.com/maps/documentation/javascript/examples/full/images/beachflag.png"; const beachMarker = new google.maps.Marker({ position: { lat: -33.89, lng: 151.274 }, map, icon: image, }); } window.initMap = initMap;
測試範例
採用向量圖示的標記
您可以使用自訂 SVG 向量路徑,定義標記的視覺外觀。方法很簡單,只要將含有所需路徑的 Symbol
物件常值,傳遞至標記的 icon
屬性即可。您可以使用 SVG 路徑標記法定義自訂路徑,也可以使用 google.maps.SymbolPath 中的其中一個預先定義路徑。您必須使用 anchor
屬性,才能在縮放等級變更時正確顯示標記。進一步瞭解如何使用符號來建立向量圖示 (標記和折線適用)。
TypeScript
// This example uses SVG path notation to add a vector-based symbol // as the icon for a marker. The resulting icon is a marker-shaped // symbol with a blue fill and no border. function initMap(): void { const center = new google.maps.LatLng(-33.712451, 150.311823); const map = new google.maps.Map( document.getElementById("map") as HTMLElement, { zoom: 9, center: center, } ); const svgMarker = { path: "M-1.547 12l6.563-6.609-1.406-1.406-5.156 5.203-2.063-2.109-1.406 1.406zM0 0q2.906 0 4.945 2.039t2.039 4.945q0 1.453-0.727 3.328t-1.758 3.516-2.039 3.070-1.711 2.273l-0.75 0.797q-0.281-0.328-0.75-0.867t-1.688-2.156-2.133-3.141-1.664-3.445-0.75-3.375q0-2.906 2.039-4.945t4.945-2.039z", fillColor: "blue", fillOpacity: 0.6, strokeWeight: 0, rotation: 0, scale: 2, anchor: new google.maps.Point(0, 20), }; new google.maps.Marker({ position: map.getCenter(), icon: svgMarker, map: map, }); } declare global { interface Window { initMap: () => void; } } window.initMap = initMap;
JavaScript
// This example uses SVG path notation to add a vector-based symbol // as the icon for a marker. The resulting icon is a marker-shaped // symbol with a blue fill and no border. function initMap() { const center = new google.maps.LatLng(-33.712451, 150.311823); const map = new google.maps.Map(document.getElementById("map"), { zoom: 9, center: center, }); const svgMarker = { path: "M-1.547 12l6.563-6.609-1.406-1.406-5.156 5.203-2.063-2.109-1.406 1.406zM0 0q2.906 0 4.945 2.039t2.039 4.945q0 1.453-0.727 3.328t-1.758 3.516-2.039 3.070-1.711 2.273l-0.75 0.797q-0.281-0.328-0.75-0.867t-1.688-2.156-2.133-3.141-1.664-3.445-0.75-3.375q0-2.906 2.039-4.945t4.945-2.039z", fillColor: "blue", fillOpacity: 0.6, strokeWeight: 0, rotation: 0, scale: 2, anchor: new google.maps.Point(0, 20), }; new google.maps.Marker({ position: map.getCenter(), icon: svgMarker, map: map, }); } window.initMap = initMap;
測試範例程式碼
標記標籤
標記標籤是顯示在標記內的字母或數字。本節中的標記圖片會顯示含有字母「B」的標記標籤。您可以指定標記標籤做為字串,或是做為包含字串和其他標籤屬性的 MarkerLabel
物件。
建立標記時,您可以在 MarkerOptions
物件中指定 label
屬性。或者,您也可以針對 Marker 物件呼叫 setLabel()
,在現有標記上設定標籤。
下例會在使用者按下地圖後顯示包含標籤的標記:
TypeScript
// In the following example, markers appear when the user clicks on the map. // Each marker is labeled with a single alphabetical character. const labels = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; let labelIndex = 0; function initMap(): void { const bangalore = { lat: 12.97, lng: 77.59 }; const map = new google.maps.Map( document.getElementById("map") as HTMLElement, { zoom: 12, center: bangalore, } ); // This event listener calls addMarker() when the map is clicked. google.maps.event.addListener(map, "click", (event) => { addMarker(event.latLng, map); }); // Add a marker at the center of the map. addMarker(bangalore, map); } // Adds a marker to the map. function addMarker(location: google.maps.LatLngLiteral, map: google.maps.Map) { // Add the marker at the clicked location, and add the next-available label // from the array of alphabetical characters. new google.maps.Marker({ position: location, label: labels[labelIndex++ % labels.length], map: map, }); } declare global { interface Window { initMap: () => void; } } window.initMap = initMap;
JavaScript
// In the following example, markers appear when the user clicks on the map. // Each marker is labeled with a single alphabetical character. const labels = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; let labelIndex = 0; function initMap() { const bangalore = { lat: 12.97, lng: 77.59 }; const map = new google.maps.Map(document.getElementById("map"), { zoom: 12, center: bangalore, }); // This event listener calls addMarker() when the map is clicked. google.maps.event.addListener(map, "click", (event) => { addMarker(event.latLng, map); }); // Add a marker at the center of the map. addMarker(bangalore, map); } // Adds a marker to the map. function addMarker(location, map) { // Add the marker at the clicked location, and add the next-available label // from the array of alphabetical characters. new google.maps.Marker({ position: location, label: labels[labelIndex++ % labels.length], map: map, }); } window.initMap = initMap;
測試範例程式碼
複雜圖示
您可以指定複雜的形狀來表示可點擊的區域,以及圖示相對於其他疊加層的顯示方式 (即「堆疊順序」)。透過這種方式指定的圖示,應將其中的 icon
屬性設為 Icon
類型的物件。
Icon
物件會定義圖片,也會定義圖示的 size
和 origin
(例如所需圖片是精靈圖的一部分),以及應該放置圖示熱點的 anchor
(以起點為準)。
如果在自訂標記中使用標籤,您可以透過 Icon
物件中的 labelOrigin
屬性調整標籤位置。
TypeScript
// The following example creates complex markers to indicate beaches near // Sydney, NSW, Australia. Note that the anchor is set to (0,32) to correspond // to the base of the flagpole. function initMap(): void { const map = new google.maps.Map( document.getElementById("map") as HTMLElement, { zoom: 10, center: { lat: -33.9, lng: 151.2 }, } ); setMarkers(map); } // Data for the markers consisting of a name, a LatLng and a zIndex for the // order in which these markers should display on top of each other. const beaches: [string, number, number, number][] = [ ["Bondi Beach", -33.890542, 151.274856, 4], ["Coogee Beach", -33.923036, 151.259052, 5], ["Cronulla Beach", -34.028249, 151.157507, 3], ["Manly Beach", -33.80010128657071, 151.28747820854187, 2], ["Maroubra Beach", -33.950198, 151.259302, 1], ]; function setMarkers(map: google.maps.Map) { // Adds markers to the map. // Marker sizes are expressed as a Size of X,Y where the origin of the image // (0,0) is located in the top left of the image. // Origins, anchor positions and coordinates of the marker increase in the X // direction to the right and in the Y direction down. const image = { url: "https://developers.google.com/maps/documentation/javascript/examples/full/images/beachflag.png", // This marker is 20 pixels wide by 32 pixels high. size: new google.maps.Size(20, 32), // The origin for this image is (0, 0). origin: new google.maps.Point(0, 0), // The anchor for this image is the base of the flagpole at (0, 32). anchor: new google.maps.Point(0, 32), }; // Shapes define the clickable region of the icon. The type defines an HTML // <area> element 'poly' which traces out a polygon as a series of X,Y points. // The final coordinate closes the poly by connecting to the first coordinate. const shape = { coords: [1, 1, 1, 20, 18, 20, 18, 1], type: "poly", }; for (let i = 0; i < beaches.length; i++) { const beach = beaches[i]; new google.maps.Marker({ position: { lat: beach[1], lng: beach[2] }, map, icon: image, shape: shape, title: beach[0], zIndex: beach[3], }); } } declare global { interface Window { initMap: () => void; } } window.initMap = initMap;
JavaScript
// The following example creates complex markers to indicate beaches near // Sydney, NSW, Australia. Note that the anchor is set to (0,32) to correspond // to the base of the flagpole. function initMap() { const map = new google.maps.Map(document.getElementById("map"), { zoom: 10, center: { lat: -33.9, lng: 151.2 }, }); setMarkers(map); } // Data for the markers consisting of a name, a LatLng and a zIndex for the // order in which these markers should display on top of each other. const beaches = [ ["Bondi Beach", -33.890542, 151.274856, 4], ["Coogee Beach", -33.923036, 151.259052, 5], ["Cronulla Beach", -34.028249, 151.157507, 3], ["Manly Beach", -33.80010128657071, 151.28747820854187, 2], ["Maroubra Beach", -33.950198, 151.259302, 1], ]; function setMarkers(map) { // Adds markers to the map. // Marker sizes are expressed as a Size of X,Y where the origin of the image // (0,0) is located in the top left of the image. // Origins, anchor positions and coordinates of the marker increase in the X // direction to the right and in the Y direction down. const image = { url: "https://developers.google.com/maps/documentation/javascript/examples/full/images/beachflag.png", // This marker is 20 pixels wide by 32 pixels high. size: new google.maps.Size(20, 32), // The origin for this image is (0, 0). origin: new google.maps.Point(0, 0), // The anchor for this image is the base of the flagpole at (0, 32). anchor: new google.maps.Point(0, 32), }; // Shapes define the clickable region of the icon. The type defines an HTML // <area> element 'poly' which traces out a polygon as a series of X,Y points. // The final coordinate closes the poly by connecting to the first coordinate. const shape = { coords: [1, 1, 1, 20, 18, 20, 18, 1], type: "poly", }; for (let i = 0; i < beaches.length; i++) { const beach = beaches[i]; new google.maps.Marker({ position: { lat: beach[1], lng: beach[2] }, map, icon: image, shape: shape, title: beach[0], zIndex: beach[3], }); } } window.initMap = initMap;
測試範例程式碼
將 MarkerImage
物件轉換為 Icon
類型
直到 Maps JavaScript API 3.10 版為止,複雜圖示都是定義為 MarkerImage
物件。3.10 版新增的 Icon
物件常值,自 3.11 版起正式取代 MarkerImage
。Icon
物件常值支援的參數與 MarkerImage
相同,因此您只要移除建構函式,將先前的參數包裝在 {}
的參數中,並新增每個參數的名稱,就能輕鬆將 MarkerImage
轉換為 Icon
。例如:
var image = new google.maps.MarkerImage( place.icon, new google.maps.Size(71, 71), new google.maps.Point(0, 0), new google.maps.Point(17, 34), new google.maps.Size(25, 25));
becomes
var image = { url: place.icon, size: new google.maps.Size(71, 71), origin: new google.maps.Point(0, 0), anchor: new google.maps.Point(17, 34), scaledSize: new google.maps.Size(25, 25) };
Optimize markers
Optimization enhances performance by rendering many markers as a single static element. This is useful in cases where a large number of markers is required. By default, the Maps JavaScript API will decide whether a marker will be optimized. When there is a large number of markers, the Maps JavaScript API will attempt to render markers with optimization. Not all Markers can be optimized; in some situations, the Maps JavaScript API may need to render Markers without optimization. Disable optimized rendering for animated GIFs or PNGs, or when each marker must be rendered as a separate DOM element. The following example shows creating an optimized marker:
var marker = new google.maps.Marker({ position: myLatlng, title:"Hello World!", optimized: true });
將標記設為易於讀取
如要將標記設計為易於讀取,您可以加入點擊事件監聽器事件,並將 optimized
設為 false
。點擊事件監聽器會使標記具有按鈕語意,這些語意可透過鍵盤瀏覽和螢幕閱讀器等方式存取。使用 title
選項即可顯示標記的無障礙文字。
在下例中,按下 Tab 鍵時,焦點會落在第一個標記,接著,就能使用方向鍵在標記之間移動。再次按下 Tab 鍵,即可繼續在其他地圖控制項之間移動。如要開啟標記內含的資訊視窗,可以按一下標記,或是在已選取標記的狀態下按下 Enter 鍵或空格鍵。資訊視窗關閉後,焦點就會回到相關標記。
TypeScript
// The following example creates five accessible and // focusable markers. function initMap(): void { const map = new google.maps.Map( document.getElementById("map") as HTMLElement, { zoom: 12, center: { lat: 34.84555, lng: -111.8035 }, } ); // Set LatLng and title text for the markers. The first marker (Boynton Pass) // receives the initial focus when tab is pressed. Use arrow keys to // move between markers; press tab again to cycle through the map controls. const tourStops: [google.maps.LatLngLiteral, string][] = [ [{ lat: 34.8791806, lng: -111.8265049 }, "Boynton Pass"], [{ lat: 34.8559195, lng: -111.7988186 }, "Airport Mesa"], [{ lat: 34.832149, lng: -111.7695277 }, "Chapel of the Holy Cross"], [{ lat: 34.823736, lng: -111.8001857 }, "Red Rock Crossing"], [{ lat: 34.800326, lng: -111.7665047 }, "Bell Rock"], ]; // Create an info window to share between markers. const infoWindow = new google.maps.InfoWindow(); // Create the markers. tourStops.forEach(([position, title], i) => { const marker = new google.maps.Marker({ position, map, title: `${i + 1}. ${title}`, label: `${i + 1}`, optimized: false, }); // Add a click listener for each marker, and set up the info window. marker.addListener("click", () => { infoWindow.close(); infoWindow.setContent(marker.getTitle()); infoWindow.open(marker.getMap(), marker); }); }); } declare global { interface Window { initMap: () => void; } } window.initMap = initMap;
JavaScript
// The following example creates five accessible and // focusable markers. function initMap() { const map = new google.maps.Map(document.getElementById("map"), { zoom: 12, center: { lat: 34.84555, lng: -111.8035 }, }); // Set LatLng and title text for the markers. The first marker (Boynton Pass) // receives the initial focus when tab is pressed. Use arrow keys to // move between markers; press tab again to cycle through the map controls. const tourStops = [ [{ lat: 34.8791806, lng: -111.8265049 }, "Boynton Pass"], [{ lat: 34.8559195, lng: -111.7988186 }, "Airport Mesa"], [{ lat: 34.832149, lng: -111.7695277 }, "Chapel of the Holy Cross"], [{ lat: 34.823736, lng: -111.8001857 }, "Red Rock Crossing"], [{ lat: 34.800326, lng: -111.7665047 }, "Bell Rock"], ]; // Create an info window to share between markers. const infoWindow = new google.maps.InfoWindow(); // Create the markers. tourStops.forEach(([position, title], i) => { const marker = new google.maps.Marker({ position, map, title: `${i + 1}. ${title}`, label: `${i + 1}`, optimized: false, }); // Add a click listener for each marker, and set up the info window. marker.addListener("click", () => { infoWindow.close(); infoWindow.setContent(marker.getTitle()); infoWindow.open(marker.getMap(), marker); }); }); } window.initMap = initMap;
測試範例程式碼
將標記製作成動畫
您可以將標記製作成動畫,在各種情況下展現動態動作。如果要指定標記呈現的動畫效果,請使用標記的 animation
屬性 (類型為 google.maps.Animation
)。支援的 Animation
值如下:
-
DROP
表示標記第一次加到地圖上時,應從地圖頂端落到最終位置。當標記停止時,動畫會隨之停止,且animation
會還原為null
。這類動畫通常是在建立Marker
時指定。 -
BOUNCE
表示標記應在原地彈跳。在animation
屬性明確設為null
前,彈跳標記都會持續彈跳。
對 Marker
物件呼叫 setAnimation()
,即可啟動現有標記的動畫。
TypeScript
// The following example creates a marker in Stockholm, Sweden using a DROP // animation. Clicking on the marker will toggle the animation between a BOUNCE // animation and no animation. let marker: google.maps.Marker; function initMap(): void { const map = new google.maps.Map( document.getElementById("map") as HTMLElement, { zoom: 13, center: { lat: 59.325, lng: 18.07 }, } ); marker = new google.maps.Marker({ map, draggable: true, animation: google.maps.Animation.DROP, position: { lat: 59.327, lng: 18.067 }, }); marker.addListener("click", toggleBounce); } function toggleBounce() { if (marker.getAnimation() !== null) { marker.setAnimation(null); } else { marker.setAnimation(google.maps.Animation.BOUNCE); } } declare global { interface Window { initMap: () => void; } } window.initMap = initMap;
JavaScript
// The following example creates a marker in Stockholm, Sweden using a DROP // animation. Clicking on the marker will toggle the animation between a BOUNCE // animation and no animation. let marker; function initMap() { const map = new google.maps.Map(document.getElementById("map"), { zoom: 13, center: { lat: 59.325, lng: 18.07 }, }); marker = new google.maps.Marker({ map, draggable: true, animation: google.maps.Animation.DROP, position: { lat: 59.327, lng: 18.067 }, }); marker.addListener("click", toggleBounce); } function toggleBounce() { if (marker.getAnimation() !== null) { marker.setAnimation(null); } else { marker.setAnimation(google.maps.Animation.BOUNCE); } } window.initMap = initMap;
測試範例程式碼
如果您有許多標記,或許不會想要同時放到地圖上。您可以使用 setTimeout()
,透過下列形式隔開標記動畫的顯示時間:
function drop() { for (var i =0; i < markerArray.length; i++) { setTimeout(function() { addMarkerMethod(); }, i * 200); } }
將標記設為可拖曳
如要允許使用者將標記拖曳至地圖上的其他位置,請將標記選項中的 draggable
設為 true
。
var myLatlng = new google.maps.LatLng(-25.363882,131.044922); var mapOptions = { zoom: 4, center: myLatlng } var map = new google.maps.Map(document.getElementById("map"), mapOptions); // Place a draggable marker on the map var marker = new google.maps.Marker({ position: myLatlng, map: map, draggable:true, title:"Drag me!" });
進一步自訂標記
如要完全自訂標記,請參閱自訂彈出式視窗範例。
如要瞭解 Marker 擴充類別、標記叢集和管理,以及疊加層自訂功能,請參閱開放原始碼程式庫。
除非另有註明,否則本頁面中的內容是採用創用 CC 姓名標示 4.0 授權,程式碼範例則為阿帕契 2.0 授權。詳情請參閱《Google Developers 網站政策》。Java 是 Oracle 和/或其關聯企業的註冊商標。
上次更新時間:2024-07-16 (世界標準時間)。