Bản đồ choropleth là một loại bản đồ theo chủ đề, trong đó các khu vực hành chính được tô màu hoặc tô bóng theo giá trị dữ liệu. Bạn có thể sử dụng FeatureLayerStyle
để tạo kiểu cho bản đồ dựa trên dữ liệu, trong đó mỗi khu vực hành chính được liên kết với một dải giá trị số.
Trong ví dụ này, dữ liệu bao gồm một mảng các cặp khoá-giá trị, khớp với tên hiển thị của từng trạng thái với giá trị tập hợp dạng số.
Swift
//.. let featureLayer = mapView.featureLayer(of: FeatureType.administrativeAreaLevel1) let populationOfStates = [ "ChIJdf5LHzR_hogR6czIUzU0VV4": 5_039_877, "ChIJG8CuwJzfAFQRNduKqSde27w": 732673, "ChIJaxhMy-sIK4cRcc3Bf7EnOUI": 7_276_316, "ChIJYSc_dD-e0ocR0NLf_z5pBaQ": 3_025_891, "ChIJPV4oX_65j4ARVW8IJ6IJUYs": 39_237_836, // California "ChIJt1YYm3QUQIcR_6eQSTGDVMc": 5_812_069, "ChIJpVER8hFT5okR5XBhBVttmq4": 3_605_597, "ChIJO9YMTXYFx4kReOgEjBItHZQ": 1_003_384, "ChIJvypWkWV2wYgR0E7HW9MTLvc": 21_781_128, "ChIJV4FfHcU28YgR5xBP7BC8hGY": 10_799_566, "ChIJBeB5Twbb_3sRKIbMdNKCd0s": 1_441_553, "ChIJ6Znkhaj_WFMRWIf3FQUwa9A": 1_900_923, "ChIJGSZubzgtC4gRVlkRZFCCFX8": 12_671_469, "ChIJHRv42bxQa4gRcuwyy84vEH4": 6_805_985, "ChIJGWD48W9e7ocR2VnHV0pj78Y": 3_193_079, "ChIJawF8cXEXo4cRXwk-S6m0wmg": 2_934_582, "ChIJyVMZi0xzQogR_N_MxU5vH3c": 4_509_394, "ChIJZYIRslSkIIYRA0flgTL3Vck": 4_624_047, "ChIJ1YpTHd4dsEwR0KggZ2_MedY": 1_372_247, "ChIJ35Dx6etNtokRsfZVdmU3r_I": 6_165_129, "ChIJ_b9z6W1l44kRHA2DVTbQxkU": 6_984_723, "ChIJEQTKxz2qTE0Rs8liellI3Zc": 10_050_811, "ChIJmwt4YJpbWE0RD6L-EJvJogI": 5_707_390, "ChIJGdRK5OQyKIYR2qbc6X8XDWI": 2_949_965, "ChIJfeMiSNXmwIcRcr1mBFnEW7U": 6_168_187, "ChIJ04p7LZwrQVMRGGwqz1jWcfU": 1_104_271, "ChIJ7fwMtciNk4cRxArzDwyQJ6E": 1_963_692, "ChIJcbTe-KEKmYARs5X8qooDR88": 3_143_991, "ChIJ66bAnUtEs0wR64CmJa8CyNc": 1_388_992, "ChIJn0AAnpX7wIkRjW0_-Ad70iw": 9_267_130, "ChIJqVKY50NQGIcRup41Yxpuv0Y": 2_115_877, "ChIJqaUj8fBLzEwRZ5UY3sHGz90": 19_835_913, "ChIJgRo4_MQfVIgRGa4i6fUwP60": 10_551_162, "ChIJY-nYVxKD11IRyc9egzmahA0": 774948, "ChIJwY5NtXrpNogRFtmfnDlkzeU": 11_780_017, "ChIJnU-ssRE5rIcRSOoKQDPPHF0": 3_986_639, "ChIJVWqfm3xuk1QRdrgLettlTH0": 4_246_155, "ChIJieUyHiaALYgRPbQiUEchRsI": 12_964_056, "ChIJD9cOYhQ15IkR5wbB57wYTh4": 1_095_610, "ChIJ49ExeWml-IgRnhcF9TKh_7k": 5_190_705, "ChIJpTjphS1DfYcRt6SGMSnW8Ac": 895376, "ChIJA8-XniNLYYgRVpGBpcEgPgM": 6_975_218, "ChIJSTKCCzZwQIYRPN4IGI8c6xY": 29_527_941, "ChIJzfkTj8drTIcRP0bXbKVK370": 3_337_975, "ChIJ_87aSGzctEwRtGtUNnSJTSY": 645570, "ChIJzbK8vXDWTIgRlaZGt0lBTsA": 8_642_274, "ChIJ-bDD5__lhVQRuvNfbGh4QpQ": 7_738_692, "ChIJRQnL1KVUSogRQzrN3mjHALs": 1_782_959, "ChIJr-OEkw_0qFIR1kmG-LjV1fI": 5_895_908, "ChIJaS7hSDTiXocRLzh90nkisCY": 578803, // Wyoming ] featureLayer.style = { feature in FeatureStyle( fill: populationOfStates[feature.placeID].map { UIColor( hue: log(CGFloat($0) / 5e5) / 7.5, saturation: 1, brightness: 0.75, alpha: 0.5) } ?? nil, stroke: nil, strokeWidth: 0 ) } self.view = mapView
Objective-C
//.. GMSFeatureLayer<GMSPlaceFeature *> *featureLayer = [mapView featureLayerOfFeatureType:GMSFeatureTypeAdministrativeAreaLevel1]; NSDictionary<NSString *, NSNumber *> *populationOfStates = @{ @"ChIJdf5LHzR_hogR6czIUzU0VV4" : @(5039877), @"ChIJG8CuwJzfAFQRNduKqSde27w" : @(732673), @"ChIJaxhMy-sIK4cRcc3Bf7EnOUI" : @(7276316), @"ChIJYSc_dD-e0ocR0NLf_z5pBaQ" : @(3025891), @"ChIJPV4oX_65j4ARVW8IJ6IJUYs" : @(39237836), // California @"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 }; featureLayer.style = ^(GMSPlaceFeature *feature) { NSNumber *population = populationOfStates[feature.placeID]; UIColor *fillColor = population ? [UIColor colorWithHue:(log(population.doubleValue / 5e5) / 7.5) saturation:1 brightness:0.5 alpha:0.5] : nil; return [GMSFeatureStyle styleWithFillColor:fillColor strokeColor:nil strokeWidth:0.0]; }; self.view = mapView;