خريطة التوزيعات ذات التظليل المساحي هي نوع من الخرائط الموضوعية التي يتم فيها
تلوين المناطق الإدارية أو تظليلها وفقًا لقيمة البيانات. يمكنك استخدام
google.maps.FeatureStyleFunction
لإضفاء نمط على خريطة استنادًا إلى مجموعة بيانات تكون فيها كل منطقة إدارية مرتبطة
بنطاق من القيم الرقمية. تُظهر الخريطة في المثال التالي خريطة توزيعات ذات تظليل مساحي
تصور البيانات السكانية للولاية للولايات المتحدة.
في هذا المثال، تتكون البيانات من صفيف من أزواج المفتاح/القيمة، تتطابق
الاسم المعروض لكل ولاية بقيمة عدد السكان الرقمية. يُلوّن العنصر
maps.FeatureStyleFunction
كل منطقة بشكل مشروط استنادًا إلى
القيم في الصفيف.
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, }; };
إكمال نموذج الرمز البرمجي
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();
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> <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>