Descripción general
Con este instructivo, aprenderás a crear una leyenda en un mapa de Google. Por lo general, las leyendas describen los símbolos y marcadores de un mapa. Puedes crearlas con la función de posicionamiento de controles personalizados.
El siguiente mapa contiene una leyenda que proporciona información sobre tres marcadores personalizados distintos que aparecen en el mapa.
En la siguiente sección se muestra el código completo que necesitas para crear el mapa y la leyenda de este instructivo.
var map;
function initMap() {
map = new google.maps.Map(document.getElementById('map'), {
zoom: 16,
center: new google.maps.LatLng(-33.91722, 151.23064),
mapTypeId: 'roadmap'
});
var iconBase = 'https://maps.google.com/mapfiles/kml/shapes/';
var icons = {
parking: {
name: 'Parking',
icon: iconBase + 'parking_lot_maps.png'
},
library: {
name: 'Library',
icon: iconBase + 'library_maps.png'
},
info: {
name: 'Info',
icon: iconBase + 'info-i_maps.png'
}
};
function addMarker(feature) {
var marker = new google.maps.Marker({
position: feature.position,
icon: icons[feature.type].icon,
map: map
});
}
var features = [
{
position: new google.maps.LatLng(-33.91721, 151.22630),
type: 'info'
}, {
position: new google.maps.LatLng(-33.91539, 151.22820),
type: 'info'
}, {
position: new google.maps.LatLng(-33.91747, 151.22912),
type: 'info'
}, {
position: new google.maps.LatLng(-33.91910, 151.22907),
type: 'info'
}, {
position: new google.maps.LatLng(-33.91725, 151.23011),
type: 'info'
}, {
position: new google.maps.LatLng(-33.91872, 151.23089),
type: 'info'
}, {
position: new google.maps.LatLng(-33.91784, 151.23094),
type: 'info'
}, {
position: new google.maps.LatLng(-33.91682, 151.23149),
type: 'info'
}, {
position: new google.maps.LatLng(-33.91790, 151.23463),
type: 'info'
}, {
position: new google.maps.LatLng(-33.91666, 151.23468),
type: 'info'
}, {
position: new google.maps.LatLng(-33.916988, 151.233640),
type: 'info'
}, {
position: new google.maps.LatLng(-33.91662347903106, 151.22879464019775),
type: 'parking'
}, {
position: new google.maps.LatLng(-33.916365282092855, 151.22937399734496),
type: 'parking'
}, {
position: new google.maps.LatLng(-33.91665018901448, 151.2282474695587),
type: 'parking'
}, {
position: new google.maps.LatLng(-33.919543720969806, 151.23112279762267),
type: 'parking'
}, {
position: new google.maps.LatLng(-33.91608037421864, 151.23288232673644),
type: 'parking'
}, {
position: new google.maps.LatLng(-33.91851096391805, 151.2344058214569),
type: 'parking'
}, {
position: new google.maps.LatLng(-33.91818154739766, 151.2346203981781),
type: 'parking'
}, {
position: new google.maps.LatLng(-33.91727341958453, 151.23348314155578),
type: 'library'
}
];
for (var i = 0, feature; feature = features[i]; i++) {
addMarker(feature);
}
var legend = document.getElementById('legend');
for (var key in icons) {
var type = icons[key];
var name = type.name;
var icon = type.icon;
var div = document.createElement('div');
div.innerHTML = '<img src="' + icon + '"> ' + name;
legend.appendChild(div);
}
map.controls[google.maps.ControlPosition.RIGHT_BOTTOM].push(legend);
}
<div id="map"></div> <div id="legend"><h3>Legend</h3></div>
html, body {
margin: 0;
padding: 0;
height: 100%;
width: 100%;
}
#map {
height: 400px;
width: 100%;
}
#legend {
font-family: Arial, sans-serif;
background: #fff;
padding: 10px;
margin: 10px;
border: 3px solid #000;
}
#legend h3 {
margin-top: 0;
}
#legend img {
vertical-align: middle;
}
<!-- Replace the value of the key parameter with your own API key. --> <script async defer src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk&callback=initMap"> </script>
Pruébalo
Desplázate a la esquina superior derecha del bloque de código para copiar el código o abrirlo en JSFiddle.
<!DOCTYPE html>
<html>
<head>
<title>Custom Legend</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
<meta charset="utf-8">
<style>
html, body {
margin: 0;
padding: 0;
height: 100%;
width: 100%;
}
#map {
height: 400px;
width: 100%;
}
#legend {
font-family: Arial, sans-serif;
background: #fff;
padding: 10px;
margin: 10px;
border: 3px solid #000;
}
#legend h3 {
margin-top: 0;
}
#legend img {
vertical-align: middle;
}
</style>
</head>
<body>
<div id="map"></div>
<div id="legend"><h3>Legend</h3></div>
<script>
var map;
function initMap() {
map = new google.maps.Map(document.getElementById('map'), {
zoom: 16,
center: new google.maps.LatLng(-33.91722, 151.23064),
mapTypeId: 'roadmap'
});
var iconBase = 'https://maps.google.com/mapfiles/kml/shapes/';
var icons = {
parking: {
name: 'Parking',
icon: iconBase + 'parking_lot_maps.png'
},
library: {
name: 'Library',
icon: iconBase + 'library_maps.png'
},
info: {
name: 'Info',
icon: iconBase + 'info-i_maps.png'
}
};
function addMarker(feature) {
var marker = new google.maps.Marker({
position: feature.position,
icon: icons[feature.type].icon,
map: map
});
}
var features = [
{
position: new google.maps.LatLng(-33.91721, 151.22630),
type: 'info'
}, {
position: new google.maps.LatLng(-33.91539, 151.22820),
type: 'info'
}, {
position: new google.maps.LatLng(-33.91747, 151.22912),
type: 'info'
}, {
position: new google.maps.LatLng(-33.91910, 151.22907),
type: 'info'
}, {
position: new google.maps.LatLng(-33.91725, 151.23011),
type: 'info'
}, {
position: new google.maps.LatLng(-33.91872, 151.23089),
type: 'info'
}, {
position: new google.maps.LatLng(-33.91784, 151.23094),
type: 'info'
}, {
position: new google.maps.LatLng(-33.91682, 151.23149),
type: 'info'
}, {
position: new google.maps.LatLng(-33.91790, 151.23463),
type: 'info'
}, {
position: new google.maps.LatLng(-33.91666, 151.23468),
type: 'info'
}, {
position: new google.maps.LatLng(-33.916988, 151.233640),
type: 'info'
}, {
position: new google.maps.LatLng(-33.91662347903106, 151.22879464019775),
type: 'parking'
}, {
position: new google.maps.LatLng(-33.916365282092855, 151.22937399734496),
type: 'parking'
}, {
position: new google.maps.LatLng(-33.91665018901448, 151.2282474695587),
type: 'parking'
}, {
position: new google.maps.LatLng(-33.919543720969806, 151.23112279762267),
type: 'parking'
}, {
position: new google.maps.LatLng(-33.91608037421864, 151.23288232673644),
type: 'parking'
}, {
position: new google.maps.LatLng(-33.91851096391805, 151.2344058214569),
type: 'parking'
}, {
position: new google.maps.LatLng(-33.91818154739766, 151.2346203981781),
type: 'parking'
}, {
position: new google.maps.LatLng(-33.91727341958453, 151.23348314155578),
type: 'library'
}
];
for (var i = 0, feature; feature = features[i]; i++) {
addMarker(feature);
}
var legend = document.getElementById('legend');
for (var key in icons) {
var type = icons[key];
var name = type.name;
var icon = type.icon;
var div = document.createElement('div');
div.innerHTML = '<img src="' + icon + '"> ' + name;
legend.appendChild(div);
}
map.controls[google.maps.ControlPosition.RIGHT_BOTTOM].push(legend);
}
</script>
<script async defer
src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap">
</script>
</body>
</html>
En las siguientes secciones, se explican los pasos principales para crear una leyenda.
Crear el contenedor de la leyenda
En la siguiente tabla, se explica el código que permite personalizar la leyenda.
| Código y descripción | |
|---|---|
|
Crea un div para incluir el contenido.Agrega un nivel de encabezado tres (3) a div. |
|
Agrega una posición de control y dispón div en la esquina inferior derecha del
mapa. Obtén más información sobre otras opciones de posición de control. |
|
Define el estilo del control de leyenda con CSS. |
Agregar el contenido de la leyenda
Usa la definición de estilos de marcadores actual para completar la leyenda.
var legend = document.getElementById('legend');
for (var style in styles) {
var name = style.name;
var icon = style.icon;
var div = document.createElement('div');
div.innerHTML = '<img src="' + icon + '"> ' + name;
legend.appendChild(div);
}
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