Con una función google.maps.FeatureStyleFunction que contenga la lógica de diseño o con la interfaz google.maps.FeatureStyleOptions, puedes establecer la propiedad style en una capa de componentes del conjunto de datos para aplicar diseño de manera uniforme a todos los componentes de datos incluidos en esa capa. Puedes aplicar diseños a los componentes de datos para adaptar el relleno (color y opacidad), el trazo (color, opacidad y grosor) y el diámetro (puntos). Esta página muestra cómo acceder a un conjunto de datos de forma programática y aplicar diseño a sus componentes, y presenta ejemplos de aplicación de diseño a componentes de datos con geometrías de punto, polígono y polilínea.
El diseño basado en datos aplicable a conjuntos de datos renderiza componentes de datos según las coordenadas proporcionadas de latitud y longitud del archivo de datos geoespaciales que se usó para crear el conjunto de datos.
Atributos de los componentes de datos
La función de diseño de componentes permite acceder a todos los datos de un conjunto de datos. Para obtener atributos de un componente de datos, primero tienes que identificar el componente del conjunto de datos (el componente que contiene todos los datos de ese conjunto) y luego obtener el atributo de datos específico con el que deseas trabajar, como se muestra a continuación:
TypeScript
// Get the dataset feature, so we can work with all of its attributes. const datasetFeature = params.feature; // Get all of the needed dataset attributes. const furColors = datasetFeature.datasetAttributes['CombinationofPrimaryandHighlightColor'];
JavaScript
// Get the dataset feature, so we can work with all of its attributes. const datasetFeature = params.feature; // Get all of the needed dataset attributes. const furColors = datasetFeature.datasetAttributes["CombinationofPrimaryandHighlightColor"];
Opciones de diseño de componentes
Las opciones de diseño de componentes te permiten definir el diseño de la capa de componentes de datos; por ejemplo, el relleno y el trazo de los polígonos, o el color y el diámetro de los puntos. En el siguiente ejemplo, se muestran opciones de diseño de componentes, las que se pueden aplicar directamente mediante la propiedad style de un componente:
TypeScript
// Apply style to all features.
datasetLayer.style = { strokeColor: 'green', strokeWeight: 4, };
JavaScript
// Apply style to all features.
datasetLayer.style = { strokeColor: "green", strokeWeight: 4 };
Función de diseño de componentes
Usa una función de diseño de componentes para definir la lógica de diseño de los componentes de un conjunto de datos.
Para aplicar diseño a un componente, establece la propiedad style con una función google.maps.FeatureStyleFunction.
La función de diseño te permite definir la lógica que se utilizará para diseñar componentes particulares de una capa de componentes. Cuando se establece featureLayer.style, la función de diseño se ejecuta en cada componente de la capa afectada. La función se aplica en el momento en que configuras la propiedad style. Para actualizar la función, tienes que volver a configurar esa propiedad. En el siguiente ejemplo, se muestra una función simple de diseño de componentes:
TypeScript
const styleDefault = {
strokeColor: 'green',
strokeWeight: 2.0,
strokeOpacity: 1.0,
fillColor: 'green',
fillOpacity: 0.3,
};
const styleClicked = {
...styleDefault,
strokeColor: 'blue',
fillColor: 'blue',
fillOpacity: 0.5,
};
const styleMouseMove = {
...styleDefault,
strokeWeight: 4.0
};
function applyStyle(/* FeatureStyleFunctionOptions */ params) {
const datasetFeature = params.feature;
// Note, 'globalid' is an attribute in this dataset.
//@ts-ignore
if (lastClickedFeatureIds.includes(datasetFeature.datasetAttributes['globalid'])) {
return styleClicked;
}
//@ts-ignore
if (lastInteractedFeatureIds.includes(datasetFeature.datasetAttributes['globalid'])) {
return styleMouseMove;
}
return styleDefault;
}
JavaScript
const styleDefault = {
strokeColor: "green",
strokeWeight: 2.0,
strokeOpacity: 1.0,
fillColor: "green",
fillOpacity: 0.3,
};
const styleClicked = {
...styleDefault,
strokeColor: "blue",
fillColor: "blue",
fillOpacity: 0.5,
};
const styleMouseMove = {
...styleDefault,
strokeWeight: 4.0,
};
function applyStyle(/* FeatureStyleFunctionOptions */ params) {
const datasetFeature = params.feature;
// Note, 'globalid' is an attribute in this dataset.
//@ts-ignore
if (
lastClickedFeatureIds.includes(datasetFeature.datasetAttributes["globalid"])
) {
return styleClicked;
}
//@ts-ignore
if (
lastInteractedFeatureIds.includes(
datasetFeature.datasetAttributes["globalid"],
)
) {
return styleMouseMove;
}
return styleDefault;
}
La función de diseño siempre debe mostrar resultados coherentes cuando se aplica a los componentes. Por ejemplo, si deseas colorear de forma aleatoria un conjunto de componentes, la aleatoriedad no debería ocurrir en la función de diseño de componentes, ya que esto generaría resultados inesperados. Dado que esta función se ejecuta en todos los componentes de una capa, la optimización es importante. Para no afectar los tiempos de renderización, establece la propiedad style en null cuando una capa ya no esté en uso.
Ejemplo de aplicación de diseño a datos de punto
En este ejemplo, se muestra un enfoque para aplicar diseño a componentes de datos basados en una geometría de punto.
Acerca del conjunto de datos
El conjunto de datos que se usa en este ejemplo es el resultado de una encuesta de 2018 sobre ardillas en Central Park, ciudad de Nueva York.
En el siguiente extracto del archivo de datos CSV, se observa que las columnas x y y se usan para la ubicación geográfica. También se incluye una columna LatLng, pero no se usa en este ejemplo porque la posición geográfica se debe representar con dos columnas. El conjunto de datos del censo de ardillas contiene una gran variedad de datos relacionados con el color del pelaje y el comportamiento observados (desplaza la tabla en sentido horizontal para ver todos los datos).
| X | Y | UniqueSquirrelID | Hectare | Shift | Date | Hectare SquirrelNumber | Age | PrimaryFurColor | HighlightFurColor | CombinationofPrimaryandHighlightColor | Colornotes | Location | AboveGroundSighter Measurement | SpecificLocation | Running | Chasing | Climbing | Eating | Foraging | Other Activities | Kuks | Quaas | Moans | Tailflags | Tailtwitches | Approaches | Indifferent | Runsfrom | OtherInteractions | LatLng |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| -73.9561344937861 | 40.7940823884086 | 37F-PM-1014-03 | 37F | PM | 10142018 | 3 | + | false | false | false | false | false | false | false | false | false | false | false | false | false | POINT (-73.9561344937861 40.7940823884086) | |||||||||
| -73.9688574691102 | 40.7837825208444 | 21B-AM-1019-04 | 21B | AM | 10192018 | 4 | + | false | false | false | false | false | false | false | false | false | false | false | false | false | POINT (-73.9688574691102 40.7837825208444) | |||||||||
| -73.9742811484852 | 40.775533619083 | 11B-PM-1014-08 | 11B | PM | 10142018 | 8 | Gray | Gray+ | Above Ground | 10 | false | true | false | false | false | false | false | false | false | false | false | false | false | POINT (-73.97428114848522 40.775533619083) | ||||||
| -73.9596413903948 | 40.7903128889029 | 32E-PM-1017-14 | 32E | PM | 10172018 | 14 | Adult | Gray | Gray+ | Nothing selected as Primary. Gray selected as Highlights. Made executive adjustments. | false | false | false | true | true | false | false | false | false | false | false | false | true | POINT (-73.9596413903948 40.7903128889029) | ||||||
| -73.9702676472613 | 40.7762126854894 | 13E-AM-1017-05 | 13E | AM | 10172018 | 5 | Adult | Gray | Cinnamon | Gray+Cinnamon | Above Ground | on tree stump | false | false | false | false | true | false | false | false | false | false | false | false | false | POINT (-73.9702676472613 40.7762126854894) | ||||
| -73.9683613516225 | 40.7725908847499 | 11H-AM-1010-03 | 11H | AM | 10102018 | 3 | Adult | Cinnamon | White | Cinnamon+White | false | false | false | false | true | false | false | false | false | true | false | true | false | POINT (-73.9683613516225 40.7725908847499) | ||||||
| -73.9541201789795 | 40.7931811701082 | 36H-AM-1010-02 | 36H | AM | 10102018 | 2 | Adult | Gray | Gray+ | just outside hectare | Ground Plane | FALSE | false | false | false | false | true | false | false | false | false | false | false | false | false | POINT (-73.9541201789795 40.7931811701082) |
Cómo aplicar diseño a componentes de datos de punto
En este código de ejemplo, se adopta el enfoque simple para aplicar diseño al color de relleno y el color de trazo de cada punto en función del atributo CombinationofPrimaryandHighlightColor, que combina los colores principal y secundario del pelaje de cada ardilla.
TypeScript
function setStyle(/* FeatureStyleFunctionOptions */ params) {
// Get the dataset feature, so we can work with all of its attributes.
const datasetFeature = params.feature;
// Get all of the needed dataset attributes.
const furColors = datasetFeature.datasetAttributes['CombinationofPrimaryandHighlightColor'];
// Apply styles. Fill is primary fur color, stroke is secondary fur color.
switch (furColors) {
case 'Black+':
return /* FeatureStyleOptions */ { fillColor: 'black', pointRadius: 8 };
break;
case 'Cinnamon+':
return /* FeatureStyleOptions */ { fillColor: '#8b0000', pointRadius: 8 };
break;
case 'Cinnamon+Gray':
return /* FeatureStyleOptions */ { fillColor: '#8b0000', strokeColor: 'gray', pointRadius: 6 };
break;
case 'Cinnamon+White':
return /* FeatureStyleOptions */ { fillColor: '#8b0000', strokeColor: 'white', pointRadius: 6 };
break;
case 'Gray+':
return /* FeatureStyleOptions */ { fillColor: 'gray', pointRadius: 8 };
break;
case 'Gray+Cinnamon':
return /* FeatureStyleOptions */ { fillColor: 'gray', strokeColor: '#8b0000', pointRadius: 6 };
break;
case 'Gray+Cinnamon, White':
return /* FeatureStyleOptions */ { fillColor: 'silver', strokeColor: '#8b0000', pointRadius: 6 };
break;
case 'Gray+White':
return /* FeatureStyleOptions */ { fillColor: 'gray', strokeColor: 'white', pointRadius: 6 };
break;
default: // Color not defined.
return /* FeatureStyleOptions */ { fillColor: 'yellow', pointRadius: 8 };
break;
}
}
JavaScript
function setStyle(/* FeatureStyleFunctionOptions */ params) {
// Get the dataset feature, so we can work with all of its attributes.
const datasetFeature = params.feature;
// Get all of the needed dataset attributes.
const furColors =
datasetFeature.datasetAttributes["CombinationofPrimaryandHighlightColor"];
// Apply styles. Fill is primary fur color, stroke is secondary fur color.
switch (furColors) {
case "Black+":
return /* FeatureStyleOptions */ { fillColor: "black", pointRadius: 8 };
break;
case "Cinnamon+":
return /* FeatureStyleOptions */ { fillColor: "#8b0000", pointRadius: 8 };
break;
case "Cinnamon+Gray":
return /* FeatureStyleOptions */ {
fillColor: "#8b0000",
strokeColor: "gray",
pointRadius: 6,
};
break;
case "Cinnamon+White":
return /* FeatureStyleOptions */ {
fillColor: "#8b0000",
strokeColor: "white",
pointRadius: 6,
};
break;
case "Gray+":
return /* FeatureStyleOptions */ { fillColor: "gray", pointRadius: 8 };
break;
case "Gray+Cinnamon":
return /* FeatureStyleOptions */ {
fillColor: "gray",
strokeColor: "#8b0000",
pointRadius: 6,
};
break;
case "Gray+Cinnamon, White":
return /* FeatureStyleOptions */ {
fillColor: "silver",
strokeColor: "#8b0000",
pointRadius: 6,
};
break;
case "Gray+White":
return /* FeatureStyleOptions */ {
fillColor: "gray",
strokeColor: "white",
pointRadius: 6,
};
break;
default: // Color not defined.
return /* FeatureStyleOptions */ { fillColor: "yellow", pointRadius: 8 };
break;
}
}
Ejemplo de código completo
Consulta el ejemplo de código fuente completo
TypeScript
let map;
function setStyle(/* FeatureStyleFunctionOptions */ params) {
// Get the dataset feature, so we can work with all of its attributes.
const datasetFeature = params.feature;
// Get all of the needed dataset attributes.
const furColors = datasetFeature.datasetAttributes['CombinationofPrimaryandHighlightColor'];
// Apply styles. Fill is primary fur color, stroke is secondary fur color.
switch (furColors) {
case 'Black+':
return /* FeatureStyleOptions */ { fillColor: 'black', pointRadius: 8 };
break;
case 'Cinnamon+':
return /* FeatureStyleOptions */ { fillColor: '#8b0000', pointRadius: 8 };
break;
case 'Cinnamon+Gray':
return /* FeatureStyleOptions */ { fillColor: '#8b0000', strokeColor: 'gray', pointRadius: 6 };
break;
case 'Cinnamon+White':
return /* FeatureStyleOptions */ { fillColor: '#8b0000', strokeColor: 'white', pointRadius: 6 };
break;
case 'Gray+':
return /* FeatureStyleOptions */ { fillColor: 'gray', pointRadius: 8 };
break;
case 'Gray+Cinnamon':
return /* FeatureStyleOptions */ { fillColor: 'gray', strokeColor: '#8b0000', pointRadius: 6 };
break;
case 'Gray+Cinnamon, White':
return /* FeatureStyleOptions */ { fillColor: 'silver', strokeColor: '#8b0000', pointRadius: 6 };
break;
case 'Gray+White':
return /* FeatureStyleOptions */ { fillColor: 'gray', strokeColor: 'white', pointRadius: 6 };
break;
default: // Color not defined.
return /* FeatureStyleOptions */ { fillColor: 'yellow', pointRadius: 8 };
break;
}
}
async function initMap() {
// Request needed libraries.
const { Map } = await google.maps.importLibrary('maps') as google.maps.MapsLibrary;
const position = {lat: 40.780101, lng: -73.967780};
const map = new Map(document.getElementById('map') as HTMLElement, {
zoom: 17,
center: position,
mapId: 'b98e588c46685dd7',
mapTypeControl: false,
streetViewControl: false,
fullscreenControl: false,
});
// Add the data legend.
makeLegend(map);
// Dataset ID for squirrel dataset.
const datasetId = '02fa1552-37dd-4a95-844f-f99e1c22541f';
//@ts-ignore
const datasetLayer = map.getDatasetFeatureLayer(datasetId);
//@ts-ignore
datasetLayer.style = setStyle;
// Create an attribution DIV and add the attribution to the map.
const attributionDiv = document.createElement('div');
const attributionControl = createAttribution(map);
attributionDiv.appendChild(attributionControl);
map.controls[google.maps.ControlPosition.BOTTOM_LEFT].push(attributionDiv);
}
// Create a custom control to hold attribution text.
function createAttribution(map) {
const attributionLabel = document.createElement('div');
// Define CSS styles.
attributionLabel.style.backgroundColor = '#fff';
attributionLabel.style.opacity = '0.7';
attributionLabel.style.fontFamily = 'Roboto,Arial,sans-serif';
attributionLabel.style.fontSize = '10px';
attributionLabel.style.padding = '2px';
attributionLabel.style.margin = '2px';
attributionLabel.textContent = 'Data source: NYC Open Data';
return attributionLabel;
}
function makeLegend(map) {
let colors = {
'black': ['black'],
'cinnamon': ['#8b0000'],
'cinnamon + gray': ['#8b0000','gray'],
'cinnamon + white': ['#8b0000', 'white'],
'gray': ['gray'],
'gray + cinnamon': ['gray', '#8b0000'],
'gray + cinnamon + white': ['silver', '#8b0000'],
'gray + white': ['gray', 'white'],
'no color data': ['yellow'],
};
let legend = document.createElement('div');
legend.id = 'legend';
let title = document.createElement('div');
title.innerText = 'Fur Colors';
title.classList.add('title');
legend.appendChild(title);
let k;
for (k in colors) {
let wrapper = document.createElement('div');
wrapper.id = 'container';
let box = document.createElement('div');
box.style.backgroundColor = colors[k][0];
if (colors[k][1]) {
box.style.borderColor = colors[k][1];
} else {
box.style.borderColor = colors[k][0];
}
box.classList.add('box');
let txt = document.createElement('div');
txt.classList.add('legend');
txt.innerText = k;
wrapper.appendChild(box);
wrapper.appendChild(txt);
legend.appendChild(wrapper);
}
map.controls[google.maps.ControlPosition.LEFT_TOP].push(legend);
}
initMap();
JavaScript
let map;
function setStyle(/* FeatureStyleFunctionOptions */ params) {
// Get the dataset feature, so we can work with all of its attributes.
const datasetFeature = params.feature;
// Get all of the needed dataset attributes.
const furColors =
datasetFeature.datasetAttributes["CombinationofPrimaryandHighlightColor"];
// Apply styles. Fill is primary fur color, stroke is secondary fur color.
switch (furColors) {
case "Black+":
return /* FeatureStyleOptions */ { fillColor: "black", pointRadius: 8 };
break;
case "Cinnamon+":
return /* FeatureStyleOptions */ { fillColor: "#8b0000", pointRadius: 8 };
break;
case "Cinnamon+Gray":
return /* FeatureStyleOptions */ {
fillColor: "#8b0000",
strokeColor: "gray",
pointRadius: 6,
};
break;
case "Cinnamon+White":
return /* FeatureStyleOptions */ {
fillColor: "#8b0000",
strokeColor: "white",
pointRadius: 6,
};
break;
case "Gray+":
return /* FeatureStyleOptions */ { fillColor: "gray", pointRadius: 8 };
break;
case "Gray+Cinnamon":
return /* FeatureStyleOptions */ {
fillColor: "gray",
strokeColor: "#8b0000",
pointRadius: 6,
};
break;
case "Gray+Cinnamon, White":
return /* FeatureStyleOptions */ {
fillColor: "silver",
strokeColor: "#8b0000",
pointRadius: 6,
};
break;
case "Gray+White":
return /* FeatureStyleOptions */ {
fillColor: "gray",
strokeColor: "white",
pointRadius: 6,
};
break;
default: // Color not defined.
return /* FeatureStyleOptions */ { fillColor: "yellow", pointRadius: 8 };
break;
}
}
async function initMap() {
// Request needed libraries.
const { Map } = await google.maps.importLibrary("maps");
const position = { lat: 40.780101, lng: -73.96778 };
const map = new Map(document.getElementById("map"), {
zoom: 17,
center: position,
mapId: "b98e588c46685dd7",
mapTypeControl: false,
streetViewControl: false,
fullscreenControl: false,
});
// Add the data legend.
makeLegend(map);
// Dataset ID for squirrel dataset.
const datasetId = "02fa1552-37dd-4a95-844f-f99e1c22541f";
//@ts-ignore
const datasetLayer = map.getDatasetFeatureLayer(datasetId);
//@ts-ignore
datasetLayer.style = setStyle;
// Create an attribution DIV and add the attribution to the map.
const attributionDiv = document.createElement("div");
const attributionControl = createAttribution(map);
attributionDiv.appendChild(attributionControl);
map.controls[google.maps.ControlPosition.BOTTOM_LEFT].push(attributionDiv);
}
// Create a custom control to hold attribution text.
function createAttribution(map) {
const attributionLabel = document.createElement("div");
// Define CSS styles.
attributionLabel.style.backgroundColor = "#fff";
attributionLabel.style.opacity = "0.7";
attributionLabel.style.fontFamily = "Roboto,Arial,sans-serif";
attributionLabel.style.fontSize = "10px";
attributionLabel.style.padding = "2px";
attributionLabel.style.margin = "2px";
attributionLabel.textContent = "Data source: NYC Open Data";
return attributionLabel;
}
function makeLegend(map) {
let colors = {
"black": ["black"],
"cinnamon": ["#8b0000"],
"cinnamon + gray": ["#8b0000", "gray"],
"cinnamon + white": ["#8b0000", "white"],
"gray": ["gray"],
"gray + cinnamon": ["gray", "#8b0000"],
"gray + cinnamon + white": ["silver", "#8b0000"],
"gray + white": ["gray", "white"],
"no color data": ["yellow"],
};
let legend = document.createElement("div");
legend.id = "legend";
let title = document.createElement("div");
title.innerText = "Fur Colors";
title.classList.add("title");
legend.appendChild(title);
let k;
for (k in colors) {
let wrapper = document.createElement("div");
wrapper.id = "container";
let box = document.createElement("div");
box.style.backgroundColor = colors[k][0];
if (colors[k][1]) {
box.style.borderColor = colors[k][1];
} else {
box.style.borderColor = colors[k][0];
}
box.classList.add("box");
let txt = document.createElement("div");
txt.classList.add("legend");
txt.innerText = k;
wrapper.appendChild(box);
wrapper.appendChild(txt);
legend.appendChild(wrapper);
}
map.controls[google.maps.ControlPosition.LEFT_TOP].push(legend);
}
initMap();
Ejemplo de aplicación de diseño a datos de polígono
En este ejemplo, se muestra un enfoque para aplicar diseño a componentes de datos basados en una geometría de polígono.
Acerca del conjunto de datos
El conjunto de datos que se usa en este ejemplo representa los parques de la ciudad de Nueva York. En el siguiente extracto del archivo GeoJSON del conjunto de datos, se muestra una entrada de componente representativa.
{
"type": "Feature",
"properties": {
"jurisdiction": "DPR",
"mapped": "False",
"zipcode": "11356",
"acres": "0.05",
"location": "College Pl., College Pt. Blvd., bet. 11 Ave. and 12 Ave.",
"nys_assembly": "27",
"councildistrict": "19",
"url": "http://www.nycgovparks.org/parks/Q042/",
"typecategory": "Triangle/Plaza",
"us_congress": "14",
"eapply": "Poppenhusen Park",
"parentid": "Q-07",
"gispropnum": "Q042",
"retired": "false",
"communityboard": "407",
"objectid": "6248",
"globalid": "F4810079-CBB9-4BE7-BBFA-B3C0C35D5DE5",
"name311": "Poppenhusen Park",
"department": "Q-07",
"pip_ratable": "true",
"subcategory": "Sitting Area/Triangle/Mall",
"precinct": "109",
"permit": "true",
"acquisitiondate": null,
"omppropid": "Q042",
"gisobjid": "100000301",
"signname": "Poppenhusen Park",
"address": null,
"permitparent": "Q-07",
"class": "PARK",
"nys_senate": "11",
"permitdistrict": "Q-07",
"borough": "Q",
"waterfront": "false"
},
"geometry": {
"type": "MultiPolygon",
"coordinates": [
[
[
[
-73.84575702371716,
40.78796240884273
],
[
-73.84593393292693,
40.78796857347548
],
[
-73.84577256469657,
40.787651355629556
],
[
-73.84575702371716,
40.78796240884273
]
]
]
]
}
},
Cómo aplicar diseño a componentes de datos de polígono
El código de este ejemplo aplica colores especiales a los componentes de datos asociados con un atributo typecategory de "Undeveloped" o "Parkway", y pinta de color verde todos los demás componentes.
TypeScript
function setStyle(/* FeatureStyleFunctionOptions */ params) {
const datasetFeature = params.feature;
// 'typecategory' is an attribute in this Dataset.
const typeCategory = datasetFeature.datasetAttributes['typecategory'];
switch (typeCategory) {
case 'Undeveloped': // Color undeveloped areas blue.
return /* FeatureStyleOptions */ {
strokeColor: 'blue',
strokeWeight: 2,
strokeOpacity: 1,
fillColor: 'blue',
fillOpacity: 0.3,
};
break;
case 'Parkway': // Color historical house sites red.
return /* FeatureStyleOptions */ {
strokeColor: 'red',
strokeWeight: 2,
strokeOpacity: 1,
fillColor: 'red',
fillOpacity: 0.5,
};
break;
default: // Color other type categories green.
return /* FeatureStyleOptions */ {
strokeColor: 'green',
strokeWeight: 2,
strokeOpacity: 1,
fillColor: 'green',
fillOpacity: 0.3,
};
break;
}
}
JavaScript
function setStyle(/* FeatureStyleFunctionOptions */ params) {
const datasetFeature = params.feature;
// 'typecategory' is an attribute in this Dataset.
const typeCategory = datasetFeature.datasetAttributes["typecategory"];
switch (typeCategory) {
case "Undeveloped": // Color undeveloped areas blue.
return /* FeatureStyleOptions */ {
strokeColor: "blue",
strokeWeight: 2,
strokeOpacity: 1,
fillColor: "blue",
fillOpacity: 0.3,
};
break;
case "Parkway": // Color historical house sites red.
return /* FeatureStyleOptions */ {
strokeColor: "red",
strokeWeight: 2,
strokeOpacity: 1,
fillColor: "red",
fillOpacity: 0.5,
};
break;
default: // Color other type categories green.
return /* FeatureStyleOptions */ {
strokeColor: "green",
strokeWeight: 2,
strokeOpacity: 1,
fillColor: "green",
fillOpacity: 0.3,
};
break;
}
}
Ejemplo de código completo
Consulta el ejemplo de código fuente completo
TypeScript
let map;
function setStyle(/* FeatureStyleFunctionOptions */ params) {
const datasetFeature = params.feature;
// 'typecategory' is an attribute in this Dataset.
const typeCategory = datasetFeature.datasetAttributes['typecategory'];
switch (typeCategory) {
case 'Undeveloped': // Color undeveloped areas blue.
return /* FeatureStyleOptions */ {
strokeColor: 'blue',
strokeWeight: 2,
strokeOpacity: 1,
fillColor: 'blue',
fillOpacity: 0.3,
};
break;
case 'Parkway': // Color historical house sites red.
return /* FeatureStyleOptions */ {
strokeColor: 'red',
strokeWeight: 2,
strokeOpacity: 1,
fillColor: 'red',
fillOpacity: 0.5,
};
break;
default: // Color other type categories green.
return /* FeatureStyleOptions */ {
strokeColor: 'green',
strokeWeight: 2,
strokeOpacity: 1,
fillColor: 'green',
fillOpacity: 0.3,
};
break;
}
}
async function initMap() {
// Request needed libraries.
const { Map } = await google.maps.importLibrary("maps") as google.maps.MapsLibrary;
const position = {lat: 40.580732, lng: -74.152826};
const map = new Map(document.getElementById('map') as HTMLElement, {
zoom: 14,
center: position,
mapId: 'b98e588c46685dd7',
mapTypeControl: false,
});
// Dataset ID for NYC park data.
const datasetId = '6fe13aa9-b900-45e7-b636-3236672c3f4f';
//@ts-ignore
const datasetLayer = map.getDatasetFeatureLayer(datasetId);
datasetLayer.style = setStyle;
// Create an attribution DIV and add the attribution to the map.
const attributionDiv = document.createElement('div');
const attributionControl = createAttribution(map);
attributionDiv.appendChild(attributionControl);
map.controls[google.maps.ControlPosition.LEFT_BOTTOM].push(attributionDiv);
}
function createAttribution(map) {
const attributionLabel = document.createElement('div');
// Define CSS styles.
attributionLabel.style.backgroundColor = '#fff';
attributionLabel.style.opacity = '0.7';
attributionLabel.style.fontFamily = 'Roboto,Arial,sans-serif';
attributionLabel.style.fontSize = '10px';
attributionLabel.style.padding = '2px';
attributionLabel.style.margin = '2px';
attributionLabel.textContent = 'Data source: NYC Open Data';
return attributionLabel;
}
initMap();
JavaScript
let map;
function setStyle(/* FeatureStyleFunctionOptions */ params) {
const datasetFeature = params.feature;
// 'typecategory' is an attribute in this Dataset.
const typeCategory = datasetFeature.datasetAttributes["typecategory"];
switch (typeCategory) {
case "Undeveloped": // Color undeveloped areas blue.
return /* FeatureStyleOptions */ {
strokeColor: "blue",
strokeWeight: 2,
strokeOpacity: 1,
fillColor: "blue",
fillOpacity: 0.3,
};
break;
case "Parkway": // Color historical house sites red.
return /* FeatureStyleOptions */ {
strokeColor: "red",
strokeWeight: 2,
strokeOpacity: 1,
fillColor: "red",
fillOpacity: 0.5,
};
break;
default: // Color other type categories green.
return /* FeatureStyleOptions */ {
strokeColor: "green",
strokeWeight: 2,
strokeOpacity: 1,
fillColor: "green",
fillOpacity: 0.3,
};
break;
}
}
async function initMap() {
// Request needed libraries.
const { Map } = await google.maps.importLibrary("maps");
const position = { lat: 40.580732, lng: -74.152826 };
const map = new Map(document.getElementById("map"), {
zoom: 14,
center: position,
mapId: "b98e588c46685dd7",
mapTypeControl: false,
});
// Dataset ID for NYC park data.
const datasetId = "6fe13aa9-b900-45e7-b636-3236672c3f4f";
//@ts-ignore
const datasetLayer = map.getDatasetFeatureLayer(datasetId);
datasetLayer.style = setStyle;
// Create an attribution DIV and add the attribution to the map.
const attributionDiv = document.createElement("div");
const attributionControl = createAttribution(map);
attributionDiv.appendChild(attributionControl);
map.controls[google.maps.ControlPosition.LEFT_BOTTOM].push(attributionDiv);
}
function createAttribution(map) {
const attributionLabel = document.createElement("div");
// Define CSS styles.
attributionLabel.style.backgroundColor = "#fff";
attributionLabel.style.opacity = "0.7";
attributionLabel.style.fontFamily = "Roboto,Arial,sans-serif";
attributionLabel.style.fontSize = "10px";
attributionLabel.style.padding = "2px";
attributionLabel.style.margin = "2px";
attributionLabel.textContent = "Data source: NYC Open Data";
return attributionLabel;
}
initMap();
Ejemplo de aplicación de diseño a datos de polilínea
En este ejemplo, se muestra un enfoque para aplicar diseño a componentes de datos basados en una geometría de polilínea.
Acerca del conjunto de datos
El conjunto de datos que se usa en este ejemplo muestra los puentes en el área de Seattle. En el siguiente extracto del archivo GeoJSON del conjunto de datos, se muestra una entrada de componente representativa.
{
"type": "Feature",
"properties": {
"OBJECTID": 1,
"COMPTYPE": 66,
"COMPKEY": 515774,
"HANSEGKEY": 489781,
"UNITID": "BRG-935",
"UNITTYPE": " ",
"BRGUNITID": "BRG-935",
"UNITDESC_BRG": "YALE AVE BR REV LANE OC ",
"UNITDESC_SEG": "HOWELL ST ON RP BETWEEN HOWELL ST AND I5 SB ",
"INSTDATE": null,
"EXPDATE": null,
"STATUS": " ",
"STATUSDT": null,
"CONDITION": " ",
"CONDDT": null,
"OWN": " ",
"LSTVERIFY": null,
"MAINTBY": " ",
"ADDBY": "GARCIAA",
"ADDDTTM": "2010-01-21T00:00:00Z",
"MODBY": null,
"MODDTTM": null,
"BR_NBR": 935,
"BR_CODE": " 935",
"BR_TYPE": "ST",
"BR_NAME": "YALE AVE BR REV LANE OC",
"BR_FACILITIES": "YALE AVE-SR 5 ON RAMP",
"BR_FEATURES": "SR 5 REV LANE",
"BR_RATING": 0,
"BR_INSET": 1,
"BR_GEO": "DT",
"BR_OWNER": "DOT",
"BR_OWNER_NAME": "State of Washington",
"GEOBASID": 0,
"XGEOBASID": 0,
"GISSEGKEY": 489781,
"EARTHQUAKE_RESPONSE_TEAM": " ",
"SHAPE_Length": 220.11891836147655
},
"geometry": {
"type": "LineString",
"coordinates": [
[
-122.329201929090928,
47.616910448708538
],
[
-122.329206483407461,
47.616976719821004
],
[
-122.32921802149356,
47.617042137515213
],
[
-122.329236413912909,
47.617105967923777
],
[
-122.329261454336034,
47.617167494985758
],
[
-122.329292861855023,
47.617226028479571
],
[
-122.329330284134699,
47.617280911766009
],
[
-122.329373301365223,
47.617331529154569
],
[
-122.329421430971635,
47.617377312810319
],
[
-122.329474133027375,
47.617417749124023
],
[
-122.32953081631139,
47.617452384473893
]
]
}
},
Cómo aplicar diseño a componentes de datos de polilínea
El siguiente fragmento aplica el mismo diseño directamente a todos los componentes de datos. Dado que no se requiere ninguna lógica, no se utiliza una función de diseño de componentes en este caso.
TypeScript
// Apply style to all features.
datasetLayer.style = { strokeColor: 'green', strokeWeight: 4, };
JavaScript
// Apply style to all features.
datasetLayer.style = { strokeColor: "green", strokeWeight: 4 };
Consulta el ejemplo de código fuente completo
TypeScript
let map;
async function initMap() {
// Request needed libraries.
const { Map } = await google.maps.importLibrary("maps") as google.maps.MapsLibrary;
const position = {lat: 47.59, lng: -122.31};
const map = new Map(document.getElementById('map') as HTMLElement, {
zoom: 14,
center: position,
mapId: 'b98e588c46685dd7',
mapTypeControl: false,
});
// Dataset ID for Seattle Bridges
const datasetId = '3d0bd5fb-3f42-47fe-b50f-81c0932cd533';
//@ts-ignore
const datasetLayer = map.getDatasetFeatureLayer(datasetId);
// Apply style to all features.
datasetLayer.style = { strokeColor: 'green', strokeWeight: 4, };
// Create an attribution DIV and add the attribution to the map.
const attributionDiv = document.createElement('div');
const attributionControl = createAttribution(map);
attributionDiv.appendChild(attributionControl);
map.controls[google.maps.ControlPosition.LEFT_BOTTOM].push(attributionDiv);
}
// Create a custom control to hold attribution text.
function createAttribution(map) {
const attributionLabel = document.createElement('div');
// Define CSS styles.
attributionLabel.style.backgroundColor = '#fff';
attributionLabel.style.opacity = '0.7';
attributionLabel.style.fontFamily = 'Roboto,Arial,sans-serif';
attributionLabel.style.fontSize = '10px';
attributionLabel.style.padding = '2px';
attributionLabel.style.margin = '2px';
attributionLabel.textContent = 'Data source: Seattle GeoData';
return attributionLabel;
}
initMap();
JavaScript
let map;
async function initMap() {
// Request needed libraries.
const { Map } = await google.maps.importLibrary("maps");
const position = { lat: 47.59, lng: -122.31 };
const map = new Map(document.getElementById("map"), {
zoom: 14,
center: position,
mapId: "b98e588c46685dd7",
mapTypeControl: false,
});
// Dataset ID for Seattle Bridges
const datasetId = "3d0bd5fb-3f42-47fe-b50f-81c0932cd533";
//@ts-ignore
const datasetLayer = map.getDatasetFeatureLayer(datasetId);
// Apply style to all features.
datasetLayer.style = { strokeColor: "green", strokeWeight: 4 };
// Create an attribution DIV and add the attribution to the map.
const attributionDiv = document.createElement("div");
const attributionControl = createAttribution(map);
attributionDiv.appendChild(attributionControl);
map.controls[google.maps.ControlPosition.LEFT_BOTTOM].push(attributionDiv);
}
// Create a custom control to hold attribution text.
function createAttribution(map) {
const attributionLabel = document.createElement("div");
// Define CSS styles.
attributionLabel.style.backgroundColor = "#fff";
attributionLabel.style.opacity = "0.7";
attributionLabel.style.fontFamily = "Roboto,Arial,sans-serif";
attributionLabel.style.fontSize = "10px";
attributionLabel.style.padding = "2px";
attributionLabel.style.margin = "2px";
attributionLabel.textContent = "Data source: Seattle GeoData";
return attributionLabel;
}
initMap();