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| 1 | +/** |
| 2 | + * @license |
| 3 | + * Copyright 2025 Google LLC. All Rights Reserved. |
| 4 | + * SPDX-License-Identifier: Apache-2.0 |
| 5 | + */ |
| 6 | + |
| 7 | +// [START maps_boundaries_choropleth] |
| 8 | +async function initMap() { |
| 9 | + // Request needed libraries. |
| 10 | + (await google.maps.importLibrary('maps')) as google.maps.MapsLibrary; |
| 11 | + |
| 12 | + // Get the gmp-map element. |
| 13 | + const mapElement = document.querySelector( |
| 14 | + 'gmp-map' |
| 15 | + ) as google.maps.MapElement; |
| 16 | + |
| 17 | + // Get the inner map. |
| 18 | + const innerMap = mapElement.innerMap; |
| 19 | + |
| 20 | + const featureLayer = innerMap.getFeatureLayer( |
| 21 | + google.maps.FeatureType.ADMINISTRATIVE_AREA_LEVEL_1 |
| 22 | + ); |
| 23 | + |
| 24 | + // [START maps_boundaries_choropleth_style_function] |
| 25 | + featureLayer.style = (featureStyleFunctionOptions) => { |
| 26 | + const placeFeature = |
| 27 | + featureStyleFunctionOptions.feature as google.maps.PlaceFeature; |
| 28 | + const population = states[placeFeature.placeId]; |
| 29 | + |
| 30 | + let fillColor; |
| 31 | + // Specify colors using any of the following: |
| 32 | + // * Named ('green') |
| 33 | + // * Hexadecimal ('#FF0000') |
| 34 | + // * RGB ('rgb(0, 0, 255)') |
| 35 | + // * HSL ('hsl(60, 100%, 50%)') |
| 36 | + |
| 37 | + if (population < 2000000) { |
| 38 | + fillColor = 'green'; |
| 39 | + } else if (population < 5000000) { |
| 40 | + fillColor = 'red'; |
| 41 | + } else if (population < 10000000) { |
| 42 | + fillColor = 'blue'; |
| 43 | + } else if (population < 40000000) { |
| 44 | + fillColor = 'yellow'; |
| 45 | + } |
| 46 | + return { |
| 47 | + fillColor, |
| 48 | + fillOpacity: 0.5, |
| 49 | + }; |
| 50 | + }; |
| 51 | + // [END maps_boundaries_choropleth_style_function] |
| 52 | + // Population data by state. |
| 53 | + const states = { |
| 54 | + 'ChIJdf5LHzR_hogR6czIUzU0VV4': 5039877, // Alabama |
| 55 | + 'ChIJG8CuwJzfAFQRNduKqSde27w': 732673, // Alaska |
| 56 | + 'ChIJaxhMy-sIK4cRcc3Bf7EnOUI': 7276316, // Arizona |
| 57 | + 'ChIJYSc_dD-e0ocR0NLf_z5pBaQ': 3025891, // Arkansas |
| 58 | + 'ChIJPV4oX_65j4ARVW8IJ6IJUYs': 39237836, // California |
| 59 | + 'ChIJt1YYm3QUQIcR_6eQSTGDVMc': 5812069, // Colorado |
| 60 | + 'ChIJpVER8hFT5okR5XBhBVttmq4': 3605597, // Connecticut |
| 61 | + 'ChIJO9YMTXYFx4kReOgEjBItHZQ': 1003384, // Delaware |
| 62 | + 'ChIJvypWkWV2wYgR0E7HW9MTLvc': 21781128, // Florida |
| 63 | + 'ChIJV4FfHcU28YgR5xBP7BC8hGY': 10799566, // Georgia |
| 64 | + 'ChIJBeB5Twbb_3sRKIbMdNKCd0s': 1441553, // Hawaii |
| 65 | + 'ChIJ6Znkhaj_WFMRWIf3FQUwa9A': 1900923, // Idaho |
| 66 | + 'ChIJGSZubzgtC4gRVlkRZFCCFX8': 12671469, // Illinois |
| 67 | + 'ChIJHRv42bxQa4gRcuwyy84vEH4': 6805985, // Indiana |
| 68 | + 'ChIJGWD48W9e7ocR2VnHV0pj78Y': 3193079, // Iowa |
| 69 | + 'ChIJawF8cXEXo4cRXwk-S6m0wmg': 2934582, // Kansas |
| 70 | + 'ChIJyVMZi0xzQogR_N_MxU5vH3c': 4509394, // Kentucky |
| 71 | + 'ChIJZYIRslSkIIYRA0flgTL3Vck': 4624047, // Louisiana |
| 72 | + 'ChIJ1YpTHd4dsEwR0KggZ2_MedY': 1372247, // Maine |
| 73 | + 'ChIJ35Dx6etNtokRsfZVdmU3r_I': 6165129, // Maryland |
| 74 | + 'ChIJ_b9z6W1l44kRHA2DVTbQxkU': 6984723, // Massachussetts |
| 75 | + 'ChIJEQTKxz2qTE0Rs8liellI3Zc': 10050811, // Michigan |
| 76 | + 'ChIJmwt4YJpbWE0RD6L-EJvJogI': 5707390, // Minnesota |
| 77 | + 'ChIJGdRK5OQyKIYR2qbc6X8XDWI': 2949965, // Mississippi |
| 78 | + 'ChIJfeMiSNXmwIcRcr1mBFnEW7U': 6168187, // Misssouri |
| 79 | + 'ChIJ04p7LZwrQVMRGGwqz1jWcfU': 1104271, // Montana |
| 80 | + 'ChIJ7fwMtciNk4cRxArzDwyQJ6E': 1963692, // Nebraska |
| 81 | + 'ChIJcbTe-KEKmYARs5X8qooDR88': 3143991, // Nevada |
| 82 | + 'ChIJ66bAnUtEs0wR64CmJa8CyNc': 1388992, // New Hampshire |
| 83 | + 'ChIJn0AAnpX7wIkRjW0_-Ad70iw': 9267130, // New Jersey |
| 84 | + 'ChIJqVKY50NQGIcRup41Yxpuv0Y': 2115877, // New Mexico |
| 85 | + 'ChIJqaUj8fBLzEwRZ5UY3sHGz90': 19835913, // New York |
| 86 | + 'ChIJgRo4_MQfVIgRGa4i6fUwP60': 10551162, // North Carolina |
| 87 | + 'ChIJY-nYVxKD11IRyc9egzmahA0': 774948, // North Dakota |
| 88 | + 'ChIJwY5NtXrpNogRFtmfnDlkzeU': 11780017, // Ohio |
| 89 | + 'ChIJnU-ssRE5rIcRSOoKQDPPHF0': 3986639, // Oklahoma |
| 90 | + 'ChIJVWqfm3xuk1QRdrgLettlTH0': 4246155, // Oregon |
| 91 | + 'ChIJieUyHiaALYgRPbQiUEchRsI': 12964056, // Pennsylvania |
| 92 | + 'ChIJD9cOYhQ15IkR5wbB57wYTh4': 1095610, // Rhode Island |
| 93 | + 'ChIJ49ExeWml-IgRnhcF9TKh_7k': 5190705, // South Carolina |
| 94 | + 'ChIJpTjphS1DfYcRt6SGMSnW8Ac': 895376, // South Dakota |
| 95 | + 'ChIJA8-XniNLYYgRVpGBpcEgPgM': 6975218, // Tennessee |
| 96 | + 'ChIJSTKCCzZwQIYRPN4IGI8c6xY': 29527941, // Texas |
| 97 | + 'ChIJzfkTj8drTIcRP0bXbKVK370': 3337975, // Utah |
| 98 | + 'ChIJ_87aSGzctEwRtGtUNnSJTSY': 645570, // Vermont |
| 99 | + 'ChIJzbK8vXDWTIgRlaZGt0lBTsA': 8642274, // Virginia |
| 100 | + 'ChIJ-bDD5__lhVQRuvNfbGh4QpQ': 7738692, // Washington |
| 101 | + 'ChIJRQnL1KVUSogRQzrN3mjHALs': 1782959, // West Virginia |
| 102 | + 'ChIJr-OEkw_0qFIR1kmG-LjV1fI': 5895908, // Wisconsin |
| 103 | + 'ChIJaS7hSDTiXocRLzh90nkisCY': 578803, // Wyoming |
| 104 | + }; |
| 105 | +} |
| 106 | + |
| 107 | +initMap(); |
| 108 | +// [END maps_boundaries_choropleth] |
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