Peta koroplet adalah jenis peta tematik yang menampilkan wilayah administratif yang diberi warna atau diarsir sesuai dengan nilai data. Anda dapat menggunakan FeatureLayerStyle untuk menata gaya peta berdasarkan data dengan setiap wilayah administratif dikaitkan dengan rentang nilai numerik.
Dalam contoh ini, data terdiri dari array pasangan nilai-kunci, yang mencocokkan nama tampilan setiap negara bagian dengan nilai populasi numerik.
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;