चोरोपलेथ मैप, थीम वाले मैप का एक टाइप है. इसमें प्रशासनिक इलाकों को डेटा वैल्यू के हिसाब से रंगा या शेड किया जाता है. google.maps.FeatureStyleFunction का इस्तेमाल करके, किसी डेटासेट के आधार पर मैप को स्टाइल किया जा सकता है. इसमें हर एडमिनिस्ट्रेटिव एरिया, संख्या वाली वैल्यू की रेंज से जुड़ा होता है. यहां दिए गए उदाहरण में, अमेरिका के राज्यों की जनसंख्या का डेटा दिखाने वाला चोरपलेथ मैप दिखाया गया है.
इस उदाहरण में, डेटा में की-वैल्यू पेयर का कलेक्शन है. यह कलेक्शन, हर राज्य के डिसप्ले नेम को जनसंख्या की संख्या वाली वैल्यू से मैच करता है. maps.FeatureStyleFunction, ऐरे में मौजूद वैल्यू के आधार पर हर क्षेत्र को अलग-अलग रंग में रंगता है.
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 } }
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, }; };
पूरा कोड का उदाहरण
TypeScript
async function initMap() { // Request needed libraries. const { Map } = await google.maps.importLibrary("maps") as google.maps.MapsLibrary; const map = new 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', }); 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 }; } initMap();
JavaScript
async function initMap() { // Request needed libraries. const { Map } = await google.maps.importLibrary("maps"); const map = new 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", }); 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, // 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 }; } initMap();
सीएसएस
/* * 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; }
एचटीएमएल
<html>
<head>
<title>Choropleth Map</title>
<link rel="stylesheet" type="text/css" href="./style.css" />
<script type="module" src="./index.js"></script>
</head>
<body>
<div id="map"></div>
<!-- prettier-ignore -->
<script>(g=>{var h,a,k,p="The Google Maps JavaScript API",c="google",l="importLibrary",q="__ib__",m=document,b=window;b=b[c]||(b[c]={});var d=b.maps||(b.maps={}),r=new Set,e=new URLSearchParams,u=()=>h||(h=new Promise(async(f,n)=>{await (a=m.createElement("script"));e.set("libraries",[...r]+"");for(k in g)e.set(k.replace(/[A-Z]/g,t=>"_"+t[0].toLowerCase()),g[k]);e.set("callback",c+".maps."+q);a.src=`https://maps.${c}apis.com/maps/api/js?`+e;d[q]=f;a.onerror=()=>h=n(Error(p+" could not load."));a.nonce=m.querySelector("script[nonce]")?.nonce||"";m.head.append(a)}));d[l]?console.warn(p+" only loads once. Ignoring:",g):d[l]=(f,...n)=>r.add(f)&&u().then(()=>d[l](f,...n))})
({key: "AIzaSyB41DRUbKWJHPxaFjMAwdrzWzbVKartNGg", v: "weekly"});</script>
</body>
</html>