إنشاء خريطة توزيعات ذات تظليل مساحي

اختيار النظام الأساسي: Android‏ iOS‏ JavaScript‏

خريطة التوزيعات ذات التظليل المساحي هي نوع من الخرائط الموضوعية يتم فيها تلوين أو تظليل المناطق الإدارية وفقًا لقيمة البيانات. يمكنك استخدام GMSFeatureLayer لتصميم خريطة استنادًا إلى البيانات التي يرتبط فيها كل قسم إداري بنطاق من القيم الرقمية.

رسم تخطيطي يعرض خريطة توزيعات ذات تظليل مساحي لحدود

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;