Peta koroplet adalah jenis peta tematik dengan wilayah administratif diberi warna atau diarsir sesuai dengan rentang statistik. Anda dapat menggunakan
google.maps.FeatureStyleFunction untuk menata gaya peta berdasarkan set data dengan
setiap wilayah administratif dikaitkan dengan nilai numerik. Contoh peta berikut menunjukkan peta koroplet yang menggambarkan data populasi negara bagian untuk Amerika Serikat.
Dalam contoh ini, data terdiri dari array pasangan nilai-kunci, yang mencocokkan nama tampilan setiap status dengan nilai populasi numerik. maps.FeatureStyleFunction secara kondisional mewarnai setiap wilayah berdasarkan nilai dalam array.
TypeScript
featureLayer.style = featureStyleFunctionOptions => {
const placeFeature = featureStyleFunctionOptions.feature as google.maps.PlaceFeature;
const population = states[placeFeature.placeId];
let fillColor;
// Specify colors using any of the following:
// * Named ('green')
// * Hexadecimal ('#FF0000')
// * RGB ('rgb(0, 0, 255)')
// * HSL ('hsl(60, 100%, 50%)')
if (population < 2000000) {
fillColor = 'green'
} else if (population < 5000000) {
fillColor = 'red'
} else if (population < 10000000) {
fillColor = 'blue'
} else if (population < 40000000) {
fillColor = 'yellow'
}
return {
fillColor,
fillOpacity: 0.5
}
}
// Population data by state.
const states = {
"ChIJdf5LHzR_hogR6czIUzU0VV4": 5039877, // Alabama
"ChIJG8CuwJzfAFQRNduKqSde27w": 732673, // Alaska
"ChIJaxhMy-sIK4cRcc3Bf7EnOUI": 7276316, // Arizona
"ChIJYSc_dD-e0ocR0NLf_z5pBaQ": 3025891, // Arkansas
"ChIJPV4oX_65j4ARVW8IJ6IJUYs": 39237836, // California
"ChIJt1YYm3QUQIcR_6eQSTGDVMc": 5812069, // Colorado
"ChIJpVER8hFT5okR5XBhBVttmq4": 3605597, // Connecticut
"ChIJO9YMTXYFx4kReOgEjBItHZQ": 1003384, // Delaware
"ChIJvypWkWV2wYgR0E7HW9MTLvc": 21781128, // Florida
"ChIJV4FfHcU28YgR5xBP7BC8hGY": 10799566, // Georgia
"ChIJBeB5Twbb_3sRKIbMdNKCd0s": 1441553, // Hawaii
"ChIJ6Znkhaj_WFMRWIf3FQUwa9A": 1900923, // Idaho
"ChIJGSZubzgtC4gRVlkRZFCCFX8": 12671469, // Illinois
"ChIJHRv42bxQa4gRcuwyy84vEH4": 6805985, // Indiana
"ChIJGWD48W9e7ocR2VnHV0pj78Y": 3193079, // Iowa
"ChIJawF8cXEXo4cRXwk-S6m0wmg": 2934582, // Kansas
"ChIJyVMZi0xzQogR_N_MxU5vH3c": 4509394, // Kentucky
"ChIJZYIRslSkIIYRA0flgTL3Vck": 4624047, // Louisiana
"ChIJ1YpTHd4dsEwR0KggZ2_MedY": 1372247, // Maine
"ChIJ35Dx6etNtokRsfZVdmU3r_I": 6165129, // Maryland
"ChIJ_b9z6W1l44kRHA2DVTbQxkU": 6984723, // Massachussetts
"ChIJEQTKxz2qTE0Rs8liellI3Zc": 10050811, // Michigan
"ChIJmwt4YJpbWE0RD6L-EJvJogI": 5707390, // Minnesota
"ChIJGdRK5OQyKIYR2qbc6X8XDWI": 2949965, // Mississippi
"ChIJfeMiSNXmwIcRcr1mBFnEW7U": 6168187, // Misssouri
"ChIJ04p7LZwrQVMRGGwqz1jWcfU": 1104271, // Montana
"ChIJ7fwMtciNk4cRxArzDwyQJ6E": 1963692, // Nebraska
"ChIJcbTe-KEKmYARs5X8qooDR88": 3143991, // Nevada
"ChIJ66bAnUtEs0wR64CmJa8CyNc": 1388992, // New Hampshire
"ChIJn0AAnpX7wIkRjW0_-Ad70iw": 9267130, // New Jersey
"ChIJqVKY50NQGIcRup41Yxpuv0Y": 2115877, // New Mexico
"ChIJqaUj8fBLzEwRZ5UY3sHGz90": 19835913, // New York
"ChIJgRo4_MQfVIgRGa4i6fUwP60": 10551162, // North Carolina
"ChIJY-nYVxKD11IRyc9egzmahA0": 774948, // North Dakota
"ChIJwY5NtXrpNogRFtmfnDlkzeU": 11780017, // Ohio
"ChIJnU-ssRE5rIcRSOoKQDPPHF0": 3986639, // Oklahoma
"ChIJVWqfm3xuk1QRdrgLettlTH0": 4246155, // Oregon
"ChIJieUyHiaALYgRPbQiUEchRsI": 12964056, // Pennsylvania
"ChIJD9cOYhQ15IkR5wbB57wYTh4": 1095610, // Rhode Island
"ChIJ49ExeWml-IgRnhcF9TKh_7k": 5190705, // South Carolina
"ChIJpTjphS1DfYcRt6SGMSnW8Ac": 895376, // South Dakota
"ChIJA8-XniNLYYgRVpGBpcEgPgM": 6975218, // Tennessee
"ChIJSTKCCzZwQIYRPN4IGI8c6xY": 29527941, // Texas
"ChIJzfkTj8drTIcRP0bXbKVK370": 3337975, // Utah
"ChIJ_87aSGzctEwRtGtUNnSJTSY": 645570, // Vermont
"ChIJzbK8vXDWTIgRlaZGt0lBTsA": 8642274, // Virginia
"ChIJ-bDD5__lhVQRuvNfbGh4QpQ": 7738692, // Washington
"ChIJRQnL1KVUSogRQzrN3mjHALs": 1782959, // West Virginia
"ChIJr-OEkw_0qFIR1kmG-LjV1fI": 5895908, // Wisconsin
"ChIJaS7hSDTiXocRLzh90nkisCY": 578803, // Wyoming
};
JavaScript
featureLayer.style = (featureStyleFunctionOptions) => {
const placeFeature = featureStyleFunctionOptions.feature;
const population = states[placeFeature.placeId];
let fillColor;
// Specify colors using any of the following:
// * Named ('green')
// * Hexadecimal ('#FF0000')
// * RGB ('rgb(0, 0, 255)')
// * HSL ('hsl(60, 100%, 50%)')
if (population < 2000000) {
fillColor = "green";
} else if (population < 5000000) {
fillColor = "red";
} else if (population < 10000000) {
fillColor = "blue";
} else if (population < 40000000) {
fillColor = "yellow";
}
return {
fillColor,
fillOpacity: 0.5,
};
};
// Population data by state.
const states = {
"ChIJdf5LHzR_hogR6czIUzU0VV4": 5039877,
"ChIJG8CuwJzfAFQRNduKqSde27w": 732673,
"ChIJaxhMy-sIK4cRcc3Bf7EnOUI": 7276316,
"ChIJYSc_dD-e0ocR0NLf_z5pBaQ": 3025891,
"ChIJPV4oX_65j4ARVW8IJ6IJUYs": 39237836,
"ChIJt1YYm3QUQIcR_6eQSTGDVMc": 5812069,
"ChIJpVER8hFT5okR5XBhBVttmq4": 3605597,
"ChIJO9YMTXYFx4kReOgEjBItHZQ": 1003384,
"ChIJvypWkWV2wYgR0E7HW9MTLvc": 21781128,
"ChIJV4FfHcU28YgR5xBP7BC8hGY": 10799566,
"ChIJBeB5Twbb_3sRKIbMdNKCd0s": 1441553,
"ChIJ6Znkhaj_WFMRWIf3FQUwa9A": 1900923,
"ChIJGSZubzgtC4gRVlkRZFCCFX8": 12671469,
"ChIJHRv42bxQa4gRcuwyy84vEH4": 6805985,
"ChIJGWD48W9e7ocR2VnHV0pj78Y": 3193079,
"ChIJawF8cXEXo4cRXwk-S6m0wmg": 2934582,
"ChIJyVMZi0xzQogR_N_MxU5vH3c": 4509394,
"ChIJZYIRslSkIIYRA0flgTL3Vck": 4624047,
"ChIJ1YpTHd4dsEwR0KggZ2_MedY": 1372247,
"ChIJ35Dx6etNtokRsfZVdmU3r_I": 6165129,
"ChIJ_b9z6W1l44kRHA2DVTbQxkU": 6984723,
"ChIJEQTKxz2qTE0Rs8liellI3Zc": 10050811,
"ChIJmwt4YJpbWE0RD6L-EJvJogI": 5707390,
"ChIJGdRK5OQyKIYR2qbc6X8XDWI": 2949965,
"ChIJfeMiSNXmwIcRcr1mBFnEW7U": 6168187,
"ChIJ04p7LZwrQVMRGGwqz1jWcfU": 1104271,
"ChIJ7fwMtciNk4cRxArzDwyQJ6E": 1963692,
"ChIJcbTe-KEKmYARs5X8qooDR88": 3143991,
"ChIJ66bAnUtEs0wR64CmJa8CyNc": 1388992,
"ChIJn0AAnpX7wIkRjW0_-Ad70iw": 9267130,
"ChIJqVKY50NQGIcRup41Yxpuv0Y": 2115877,
"ChIJqaUj8fBLzEwRZ5UY3sHGz90": 19835913,
"ChIJgRo4_MQfVIgRGa4i6fUwP60": 10551162,
"ChIJY-nYVxKD11IRyc9egzmahA0": 774948,
"ChIJwY5NtXrpNogRFtmfnDlkzeU": 11780017,
"ChIJnU-ssRE5rIcRSOoKQDPPHF0": 3986639,
"ChIJVWqfm3xuk1QRdrgLettlTH0": 4246155,
"ChIJieUyHiaALYgRPbQiUEchRsI": 12964056,
"ChIJD9cOYhQ15IkR5wbB57wYTh4": 1095610,
"ChIJ49ExeWml-IgRnhcF9TKh_7k": 5190705,
"ChIJpTjphS1DfYcRt6SGMSnW8Ac": 895376,
"ChIJA8-XniNLYYgRVpGBpcEgPgM": 6975218,
"ChIJSTKCCzZwQIYRPN4IGI8c6xY": 29527941,
"ChIJzfkTj8drTIcRP0bXbKVK370": 3337975,
"ChIJ_87aSGzctEwRtGtUNnSJTSY": 645570,
"ChIJzbK8vXDWTIgRlaZGt0lBTsA": 8642274,
"ChIJ-bDD5__lhVQRuvNfbGh4QpQ": 7738692,
"ChIJRQnL1KVUSogRQzrN3mjHALs": 1782959,
"ChIJr-OEkw_0qFIR1kmG-LjV1fI": 5895908,
"ChIJaS7hSDTiXocRLzh90nkisCY": 578803, // Wyoming
};
Kode contoh lengkap
TypeScript
function initMap() {
const map = new google.maps.Map(document.getElementById('map') as HTMLElement, {
center: { lat: 40.76, lng: -101.64 },
zoom: 5,
// In the cloud console, configure this Map ID with a style that enables the
// "Administrative Area Level 1" feature layer.
mapId: '7ba16be0c9375fa7',
});
//@ts-ignore
const featureLayer = map.getFeatureLayer(google.maps.FeatureType.ADMINISTRATIVE_AREA_LEVEL_1);
featureLayer.style = featureStyleFunctionOptions => {
const placeFeature = featureStyleFunctionOptions.feature as google.maps.PlaceFeature;
const population = states[placeFeature.placeId];
let fillColor;
// Specify colors using any of the following:
// * Named ('green')
// * Hexadecimal ('#FF0000')
// * RGB ('rgb(0, 0, 255)')
// * HSL ('hsl(60, 100%, 50%)')
if (population < 2000000) {
fillColor = 'green'
} else if (population < 5000000) {
fillColor = 'red'
} else if (population < 10000000) {
fillColor = 'blue'
} else if (population < 40000000) {
fillColor = 'yellow'
}
return {
fillColor,
fillOpacity: 0.5
}
}
// Population data by state.
const states = {
"ChIJdf5LHzR_hogR6czIUzU0VV4": 5039877, // Alabama
"ChIJG8CuwJzfAFQRNduKqSde27w": 732673, // Alaska
"ChIJaxhMy-sIK4cRcc3Bf7EnOUI": 7276316, // Arizona
"ChIJYSc_dD-e0ocR0NLf_z5pBaQ": 3025891, // Arkansas
"ChIJPV4oX_65j4ARVW8IJ6IJUYs": 39237836, // California
"ChIJt1YYm3QUQIcR_6eQSTGDVMc": 5812069, // Colorado
"ChIJpVER8hFT5okR5XBhBVttmq4": 3605597, // Connecticut
"ChIJO9YMTXYFx4kReOgEjBItHZQ": 1003384, // Delaware
"ChIJvypWkWV2wYgR0E7HW9MTLvc": 21781128, // Florida
"ChIJV4FfHcU28YgR5xBP7BC8hGY": 10799566, // Georgia
"ChIJBeB5Twbb_3sRKIbMdNKCd0s": 1441553, // Hawaii
"ChIJ6Znkhaj_WFMRWIf3FQUwa9A": 1900923, // Idaho
"ChIJGSZubzgtC4gRVlkRZFCCFX8": 12671469, // Illinois
"ChIJHRv42bxQa4gRcuwyy84vEH4": 6805985, // Indiana
"ChIJGWD48W9e7ocR2VnHV0pj78Y": 3193079, // Iowa
"ChIJawF8cXEXo4cRXwk-S6m0wmg": 2934582, // Kansas
"ChIJyVMZi0xzQogR_N_MxU5vH3c": 4509394, // Kentucky
"ChIJZYIRslSkIIYRA0flgTL3Vck": 4624047, // Louisiana
"ChIJ1YpTHd4dsEwR0KggZ2_MedY": 1372247, // Maine
"ChIJ35Dx6etNtokRsfZVdmU3r_I": 6165129, // Maryland
"ChIJ_b9z6W1l44kRHA2DVTbQxkU": 6984723, // Massachussetts
"ChIJEQTKxz2qTE0Rs8liellI3Zc": 10050811, // Michigan
"ChIJmwt4YJpbWE0RD6L-EJvJogI": 5707390, // Minnesota
"ChIJGdRK5OQyKIYR2qbc6X8XDWI": 2949965, // Mississippi
"ChIJfeMiSNXmwIcRcr1mBFnEW7U": 6168187, // Misssouri
"ChIJ04p7LZwrQVMRGGwqz1jWcfU": 1104271, // Montana
"ChIJ7fwMtciNk4cRxArzDwyQJ6E": 1963692, // Nebraska
"ChIJcbTe-KEKmYARs5X8qooDR88": 3143991, // Nevada
"ChIJ66bAnUtEs0wR64CmJa8CyNc": 1388992, // New Hampshire
"ChIJn0AAnpX7wIkRjW0_-Ad70iw": 9267130, // New Jersey
"ChIJqVKY50NQGIcRup41Yxpuv0Y": 2115877, // New Mexico
"ChIJqaUj8fBLzEwRZ5UY3sHGz90": 19835913, // New York
"ChIJgRo4_MQfVIgRGa4i6fUwP60": 10551162, // North Carolina
"ChIJY-nYVxKD11IRyc9egzmahA0": 774948, // North Dakota
"ChIJwY5NtXrpNogRFtmfnDlkzeU": 11780017, // Ohio
"ChIJnU-ssRE5rIcRSOoKQDPPHF0": 3986639, // Oklahoma
"ChIJVWqfm3xuk1QRdrgLettlTH0": 4246155, // Oregon
"ChIJieUyHiaALYgRPbQiUEchRsI": 12964056, // Pennsylvania
"ChIJD9cOYhQ15IkR5wbB57wYTh4": 1095610, // Rhode Island
"ChIJ49ExeWml-IgRnhcF9TKh_7k": 5190705, // South Carolina
"ChIJpTjphS1DfYcRt6SGMSnW8Ac": 895376, // South Dakota
"ChIJA8-XniNLYYgRVpGBpcEgPgM": 6975218, // Tennessee
"ChIJSTKCCzZwQIYRPN4IGI8c6xY": 29527941, // Texas
"ChIJzfkTj8drTIcRP0bXbKVK370": 3337975, // Utah
"ChIJ_87aSGzctEwRtGtUNnSJTSY": 645570, // Vermont
"ChIJzbK8vXDWTIgRlaZGt0lBTsA": 8642274, // Virginia
"ChIJ-bDD5__lhVQRuvNfbGh4QpQ": 7738692, // Washington
"ChIJRQnL1KVUSogRQzrN3mjHALs": 1782959, // West Virginia
"ChIJr-OEkw_0qFIR1kmG-LjV1fI": 5895908, // Wisconsin
"ChIJaS7hSDTiXocRLzh90nkisCY": 578803, // Wyoming
};
}
declare global {
interface Window {
initMap: () => void;
}
}
window.initMap = initMap;
JavaScript
function initMap() {
const map = new google.maps.Map(document.getElementById("map"), {
center: { lat: 40.76, lng: -101.64 },
zoom: 5,
// In the cloud console, configure this Map ID with a style that enables the
// "Administrative Area Level 1" feature layer.
mapId: "7ba16be0c9375fa7",
});
//@ts-ignore
const featureLayer = map.getFeatureLayer(
google.maps.FeatureType.ADMINISTRATIVE_AREA_LEVEL_1
);
featureLayer.style = (featureStyleFunctionOptions) => {
const placeFeature = featureStyleFunctionOptions.feature;
const population = states[placeFeature.placeId];
let fillColor;
// Specify colors using any of the following:
// * Named ('green')
// * Hexadecimal ('#FF0000')
// * RGB ('rgb(0, 0, 255)')
// * HSL ('hsl(60, 100%, 50%)')
if (population < 2000000) {
fillColor = "green";
} else if (population < 5000000) {
fillColor = "red";
} else if (population < 10000000) {
fillColor = "blue";
} else if (population < 40000000) {
fillColor = "yellow";
}
return {
fillColor,
fillOpacity: 0.5,
};
};
// Population data by state.
const states = {
"ChIJdf5LHzR_hogR6czIUzU0VV4": 5039877,
"ChIJG8CuwJzfAFQRNduKqSde27w": 732673,
"ChIJaxhMy-sIK4cRcc3Bf7EnOUI": 7276316,
"ChIJYSc_dD-e0ocR0NLf_z5pBaQ": 3025891,
"ChIJPV4oX_65j4ARVW8IJ6IJUYs": 39237836,
"ChIJt1YYm3QUQIcR_6eQSTGDVMc": 5812069,
"ChIJpVER8hFT5okR5XBhBVttmq4": 3605597,
"ChIJO9YMTXYFx4kReOgEjBItHZQ": 1003384,
"ChIJvypWkWV2wYgR0E7HW9MTLvc": 21781128,
"ChIJV4FfHcU28YgR5xBP7BC8hGY": 10799566,
"ChIJBeB5Twbb_3sRKIbMdNKCd0s": 1441553,
"ChIJ6Znkhaj_WFMRWIf3FQUwa9A": 1900923,
"ChIJGSZubzgtC4gRVlkRZFCCFX8": 12671469,
"ChIJHRv42bxQa4gRcuwyy84vEH4": 6805985,
"ChIJGWD48W9e7ocR2VnHV0pj78Y": 3193079,
"ChIJawF8cXEXo4cRXwk-S6m0wmg": 2934582,
"ChIJyVMZi0xzQogR_N_MxU5vH3c": 4509394,
"ChIJZYIRslSkIIYRA0flgTL3Vck": 4624047,
"ChIJ1YpTHd4dsEwR0KggZ2_MedY": 1372247,
"ChIJ35Dx6etNtokRsfZVdmU3r_I": 6165129,
"ChIJ_b9z6W1l44kRHA2DVTbQxkU": 6984723,
"ChIJEQTKxz2qTE0Rs8liellI3Zc": 10050811,
"ChIJmwt4YJpbWE0RD6L-EJvJogI": 5707390,
"ChIJGdRK5OQyKIYR2qbc6X8XDWI": 2949965,
"ChIJfeMiSNXmwIcRcr1mBFnEW7U": 6168187,
"ChIJ04p7LZwrQVMRGGwqz1jWcfU": 1104271,
"ChIJ7fwMtciNk4cRxArzDwyQJ6E": 1963692,
"ChIJcbTe-KEKmYARs5X8qooDR88": 3143991,
"ChIJ66bAnUtEs0wR64CmJa8CyNc": 1388992,
"ChIJn0AAnpX7wIkRjW0_-Ad70iw": 9267130,
"ChIJqVKY50NQGIcRup41Yxpuv0Y": 2115877,
"ChIJqaUj8fBLzEwRZ5UY3sHGz90": 19835913,
"ChIJgRo4_MQfVIgRGa4i6fUwP60": 10551162,
"ChIJY-nYVxKD11IRyc9egzmahA0": 774948,
"ChIJwY5NtXrpNogRFtmfnDlkzeU": 11780017,
"ChIJnU-ssRE5rIcRSOoKQDPPHF0": 3986639,
"ChIJVWqfm3xuk1QRdrgLettlTH0": 4246155,
"ChIJieUyHiaALYgRPbQiUEchRsI": 12964056,
"ChIJD9cOYhQ15IkR5wbB57wYTh4": 1095610,
"ChIJ49ExeWml-IgRnhcF9TKh_7k": 5190705,
"ChIJpTjphS1DfYcRt6SGMSnW8Ac": 895376,
"ChIJA8-XniNLYYgRVpGBpcEgPgM": 6975218,
"ChIJSTKCCzZwQIYRPN4IGI8c6xY": 29527941,
"ChIJzfkTj8drTIcRP0bXbKVK370": 3337975,
"ChIJ_87aSGzctEwRtGtUNnSJTSY": 645570,
"ChIJzbK8vXDWTIgRlaZGt0lBTsA": 8642274,
"ChIJ-bDD5__lhVQRuvNfbGh4QpQ": 7738692,
"ChIJRQnL1KVUSogRQzrN3mjHALs": 1782959,
"ChIJr-OEkw_0qFIR1kmG-LjV1fI": 5895908,
"ChIJaS7hSDTiXocRLzh90nkisCY": 578803, // Wyoming
};
}
window.initMap = initMap;
CSS
/*
* Always set the map height explicitly to define the size of the div element
* that contains the map.
*/
#map {
height: 100%;
}
/*
* Optional: Makes the sample page fill the window.
*/
html,
body {
height: 100%;
margin: 0;
padding: 0;
}
HTML
<html>
<head>
<title>Choropleth Map</title>
<script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
<link rel="stylesheet" type="text/css" href="./style.css" />
<script type="module" src="./index.js"></script>
</head>
<body>
<div id="map"></div>
<!--
The `defer` attribute causes the callback to execute after the full HTML
document has been parsed. For non-blocking uses, avoiding race conditions,
and consistent behavior across browsers, consider loading using Promises.
See https://developers.google.com/maps/documentation/javascript/load-maps-js-api
for more information.
-->
<script
src="https://maps.googleapis.com/maps/api/js?key=AIzaSyB41DRUbKWJHPxaFjMAwdrzWzbVKartNGg&callback=initMap&v=beta"
defer
></script>
</body>
</html>