خريطة تظليل نسبي هي نوع من الخرائط الموضوعية يتم فيها تلوين المناطق الإدارية أو تظليلها وفقًا لقيمة البيانات. يمكنك استخدام GMSFeatureLayer لتصميم خريطة استنادًا إلى البيانات التي يرتبط فيها كل منطقة إدارية بنطاق من القيم الرقمية.
في هذا المثال، تتألف البيانات من مصفوفة من أزواج المفتاح/القيمة، حيث يتطابق الاسم المعروض لكل ولاية مع قيمة عددية للسكان.
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;