Menata gaya contoh fitur data

Pilih platform: Android iOS JavaScript

Halaman ini menunjukkan cara mengakses set data dan menata gaya fiturnya secara terprogram, serta menjelaskan contoh-contoh gaya visual untuk fitur data berdasarkan geometri titik, poligon, dan polyline.

Gaya visual berbasis data untuk set data merender fitur data berdasarkan koordinat lintang dan bujur yang diberikan dari file data geospasial yang digunakan untuk membuat set data.

Contoh gaya visual data titik

Contoh ini menunjukkan pendekatan untuk menata gaya fitur data berbasis geometri titik.

Screenshot yang menampilkan data titik yang telah ditata gayanya.

Tentang set data

Set data yang digunakan dalam contoh ini adalah hasil dari survei tupai tahun 2018 di Central Park, New York City. Dalam kutipan berikut dari file data CSV, kolom x dan y digunakan untuk geografi; kolom LatLng disertakan, tetapi tidak digunakan dalam contoh ini karena set data hanya mendukung format WKT jika kolom diberi nama WKT. Untuk mengetahui informasi selengkapnya tentang format yang didukung untuk lokasi, lihat Persyaratan CSV.

Set data sensus tupai berisi berbagai macam titik data menarik yang terkait dengan warna bulu dan perilaku tupai yang diamati (scroll secara horizontal untuk melihat semuanya).

X Y UniqueSquirrelID Hektar Shift Tanggal Jumlah Tupai Hektar Usia Warna Bulu Utama Warna Bulu Sekunder Kombinasi Warna Utama dan Sekunder Unsur Warna Lokasi Pengukuran di Atas Tanah Lokasi Spesifik Berlari Mengejar Memanjat Makan Mencari Makanan Aktivitas Lainnya Kuks Quaas Moans Ekor Mengibas Ekor Bergerak Mendekati Bersikap tidak peduli Berlari dari Interaksi Lainnya LatLng
-73.9561344937861 40.7940823884086 37F-PM-1014-03 37F Sore/Malam 10142018 3 + false false false false false false false false false false false false false POINT (-73.9561344937861 40.7940823884086)
-73.9688574691102 40.7837825208444 21B-AM-1019-04 21B Pagi 10192018 4 + false false false false false false false false false false false false false POINT (-73.9688574691102 40.7837825208444)
-73.9742811484852 40.775533619083 11B-PM-1014-08 11B Sore/Malam 10142018 8 Abu-abu Abu-abu+ Di Atas Tanah 10 false true false false false false false false false false false false false POINT (-73.97428114848522 40.775533619083)
-73.9596413903948 40.7903128889029 32E-PM-1017-14 32E Sore/Malam 10172018 14 Dewasa Abu-abu Abu-abu+ Tidak ada yang dipilih sebagai Utama. Abu-abu dipilih sebagai Sorotan. Melakukan penyesuaian eksekutif. false false false true true false false false false false false false true POINT (-73.9596413903948 40.7903128889029)
-73.9702676472613 40.7762126854894 13E-AM-1017-05 13E Pagi 10172018 5 Dewasa Abu-abu Kayu Manis Abu-abu+Kayu Manis Di Atas Tanah pada tunggul pohon false false false false true false false false false false false false false POINT (-73.9702676472613 40.7762126854894)
-73.9683613516225 40.7725908847499 11H-AM-1010-03 11H Pagi 10102018 3 Dewasa Kayu Manis Putih Kayu Manis+Putih false false false false true false false false false true false true false POINT (-73.9683613516225 40.7725908847499)
-73.9541201789795 40.7931811701082 36H-AM-1010-02 36H Pagi 10102018 2 Dewasa Abu-abu Abu-abu+ di luar hektar Permukaan Tanah FALSE false false false false true false false false false false false false false POINT (-73.9541201789795 40.7931811701082)

Menata gaya fitur data titik

Kode dalam contoh ini menggunakan pendekatan penataan gaya warna isian dan warna goresan untuk setiap titik berdasarkan atribut CombinationofPrimaryandHighlightColor, yang menggabungkan warna bulu primer dan sekunder untuk setiap tupai.

Kotlin

private fun styleDatasetsLayer() {

  // Create the style factory function.
  val styleFactory = FeatureLayer.StyleFactory { feature: Feature ->

      // Set default colors to to yellow and point radius to 8.
      var fillColor = Color.YELLOW
      var strokeColor = Color.YELLOW
      var pointRadius = 8F
      // Check if the feature is an instance of DatasetFeature.
      if (feature is DatasetFeature) {

        val furColors: MutableMap<String, String> = feature.getDatasetAttributes()
        // Determine CombinationofPrimaryandHighlightColor attribute.
        val furColor = furColors!!["CombinationofPrimaryandHighlightColor"]
        when (furColor) {
          "Black+" -> {
            fillColor = Color.BLACK
            strokeColor= Color.BLACK
          }
          "Cinnamon+" ->  {
            fillColor = -0x750000
            strokeColor= -0x750000
          }
          "Cinnamon+Gray" -> {
            fillColor = -0x750000
            strokeColor= -0x750000
            pointRadius = 6F
          }
          "Cinnamon+White" -> {
            fillColor = -0x750000
            strokeColor= Color.WHITE
            pointRadius = 6F
          }
          "Gray+" -> fillColor = Color.GRAY
          "Gray+Cinnamon" -> {
            fillColor = Color.GRAY
            strokeColor= -0x750000
            pointRadius = 6F
          }
          "Gray+Cinnamon, White" -> {
            fillColor = Color.LTGRAY
            strokeColor= -0x750000
            pointRadius = 6F
          }
          "Gray+White" -> {
            fillColor = Color.GRAY
            strokeColor= Color.WHITE
            pointRadius = 6F
          }
        }
        return@StyleFactory FeatureStyle.Builder()
          .fillColor(fillColor)
          .strokeColor(strokeColor)
          .pointRadius(pointRadius)
          .build()
      }
    return@StyleFactory null
  }

  // Apply the style factory function to the feature layer.
  datasetLayer?.setFeatureStyle(styleFactory)
}

Java

private void styleDatasetsLayer() {

  // Create the style factory function.
  FeatureLayer.StyleFactory styleFactory = (Feature feature) -> {

    // Check if the feature is an instance of DatasetFeature.
    if (feature instanceof DatasetFeature) {

      // Determine CombinationofPrimaryandHighlightColor attribute.
      Map<String, String> furColors = ((DatasetFeature) feature).getDatasetAttributes();
      String furColor = furColors.get("CombinationofPrimaryandHighlightColor");
      // Set default colors to to yellow and point radius to 8.
      int fillColor = Color.YELLOW;
      int strokeColor = Color.YELLOW;
      int pointRadius = 8;
      switch (furColor) {
        case "Black+":
          fillColor = Color.BLACK;
          strokeColor = Color.BLACK;
          break;
        case "Cinnamon+":
          fillColor = 0xff8b0000;
          strokeColor = 0xff8b0000;
          break;
        case "Cinnamon+Gray":
          fillColor = 0xff8b0000;
          strokeColor = Color.GRAY;
          pointRadius = 6;
          break;
        case "Cinnamon+White":
          fillColor = 0xff8b0000;
          strokeColor = Color.WHITE;
          pointRadius = 6;
          break;
        case "Gray+":
          fillColor = Color.GRAY;
          strokeColor = Color.GRAY;
          break;
        case "Gray+Cinnamon":
          fillColor = Color.GRAY;
          strokeColor = 0xff8b0000;
          pointRadius = 6;
          break;
        case "Gray+Cinnamon, White":
          fillColor = Color.LTGRAY;
          strokeColor = 0xff8b0000;
          pointRadius = 6;
          break;
        case "Gray+White":
          fillColor = Color.GRAY;
          strokeColor = Color.WHITE;
          pointRadius = 6;
          break;
        default:
          fillColor = Color.YELLOW;
          strokeColor = Color.YELLOW;
          pointRadius = 8;
      }
      return new FeatureStyle.Builder()
        .fillColor(fillColor)
        .strokeColor(strokeColor)
        .pointRadius(pointRadius)
        .build();
    }
    return null;
  };

  // Apply the style factory function to the feature layer.
  datasetLayer.setFeatureStyle(styleFactory);
}

Contoh gaya visual data poligon

Contoh ini menunjukkan pendekatan untuk menata gaya fitur data berbasis geometri poligon.

Screenshot yang menampilkan data poligon yang telah ditata gayanya.

Tentang set data

Set data yang digunakan dalam contoh ini menggambarkan taman di New York City. Kutipan berikut yang berasal dari file GeoJSON set data menunjukkan entri fitur yang representatif.

{
  "type": "Feature",
  "properties": {
    "jurisdiction": "DPR",
    "mapped": "False",
    "zipcode": "11356",
    "acres": "0.05",
    "location": "College Pl., College Pt. Blvd., bet. 11 Ave. and 12 Ave.",
    "nys_assembly": "27",
    "councildistrict": "19",
    "url": "http://www.nycgovparks.org/parks/Q042/",
    "typecategory": "Triangle/Plaza",
    "us_congress": "14",
    "eapply": "Poppenhusen Park",
    "parentid": "Q-07",
    "gispropnum": "Q042",
    "retired": "false",
    "communityboard": "407",
    "objectid": "6248",
    "globalid": "F4810079-CBB9-4BE7-BBFA-B3C0C35D5DE5",
    "name311": "Poppenhusen Park",
    "department": "Q-07",
    "pip_ratable": "true",
    "subcategory": "Sitting Area/Triangle/Mall",
    "precinct": "109",
    "permit": "true",
    "acquisitiondate": null,
    "omppropid": "Q042",
    "gisobjid": "100000301",
    "signname": "Poppenhusen Park",
    "address": null,
    "permitparent": "Q-07",
    "class": "PARK",
    "nys_senate": "11",
    "permitdistrict": "Q-07",
    "borough": "Q",
    "waterfront": "false"
  },
  "geometry": {
    "type": "MultiPolygon",
    "coordinates": [
      [
        [
          [
            -73.84575702371716,
            40.78796240884273
          ],
          [
            -73.84593393292693,
            40.78796857347548
          ],
          [
            -73.84577256469657,
            40.787651355629556
          ],
          [
            -73.84575702371716,
            40.78796240884273
          ]
        ]
      ]
    ]
  }
},

Menata gaya fitur data poligon

Kode dalam contoh ini menerapkan pewarnaan khusus untuk fitur data yang terkait dengan typecategory dari "Undeveloped" atau "Parkway", dan mewarnai semua fitur lainnya dengan warna hijau.

Kotlin

private fun styleDatasetsLayer() {

    // Create the style factory function.
    val styleFactory = FeatureLayer.StyleFactory { feature: Feature ->

        // Check if the feature is an instance of DatasetFeature.
        if (feature is DatasetFeature) {
          // Determine the value of the typecategory attribute.
          val typeCategories: MutableMap<String, String> = feature.getDatasetAttributes()
          val typeCategory = typeCategories!!["typecategory"]
          // Set default colors to green.
          var fillColor = 0x4000ff00
          var strokeColor = 0xff00ff00
          when (typeCategory) {
            "Undeveloped" -> {
              // Color undeveloped areas blue.
              fillColor = 0x400000ff
              strokeColor = 0x400000ff
            }
            "Parkway" -> {
              // Color parkway areas red.
              fillColor = 0x40ff0000
              strokeColor = 0x40ff0000
            }
            else -> {
              // Color all other areas green.
              fillColor = 0x4000ff00
              strokeColor = 0xff00ff00
            }
          }
          return@StyleFactory FeatureStyle.Builder()
            .fillColor(fillColor)
            .strokeColor(strokeColor)
            .strokeWidth(2F)
            .build()
        }
        return@StyleFactory null
    }

    // Apply the style factory function to the feature layer.
    datasetLayer?.setFeatureStyle(styleFactory)
}

Java

private void styleDatasetsLayer() {

    // Create the style factory function.
    FeatureLayer.StyleFactory styleFactory = (Feature feature) -> {

      // Check if the feature is an instance of DatasetFeature.
      if (feature instanceof DatasetFeature) {

        // Determine the value of the typecategory attribute.
        Map<String, String> typeCategories = ((DatasetFeature) feature).getDatasetAttributes();
        String typeCategory = typeCategories.get("typecategory");
        // Set default colors to green.
        int fillColor = 0x4000ff00;
        int strokeColor = 0xff00ff00;
        switch (typeCategory) {
          case "Undeveloped":
            // Color undeveloped areas blue.
            fillColor = 0x400000ff;
            strokeColor = 0xff0000ff;
            break;
          case "Parkway":
            // Color parkway areas red.
            fillColor = 0x40ff0000;
            strokeColor = 0xffff0000;
            break;
          default:
            // Color all other areas green.
            fillColor = 0x4000ff00;
            strokeColor = 0xff00ff00;
        }
        return new FeatureStyle.Builder()
          .fillColor(fillColor)
          .strokeColor(strokeColor)
          .strokeWidth(2)
          .build();
      }
      return null;
    };

    // Apply the style factory function to the feature layer.
    datasetLayer.setFeatureStyle(styleFactory);
}

Contoh gaya visual data polyline

Contoh ini menunjukkan pendekatan untuk menata gaya fitur data berbasis geometri polyline.

Screenshot yang menampilkan data polyline yang telah ditata gayanya.

Tentang set data

Set data yang digunakan dalam contoh ini menunjukkan jembatan di area Seattle. Kutipan berikut yang berasal dari file GeoJSON set data menunjukkan entri fitur yang representatif.

{
  "type": "Feature",
  "properties": {
      "OBJECTID": 1,
      "COMPTYPE": 66,
      "COMPKEY": 515774,
      "HANSEGKEY": 489781,
      "UNITID": "BRG-935",
      "UNITTYPE": " ",
      "BRGUNITID": "BRG-935",
      "UNITDESC_BRG": "YALE AVE BR REV LANE OC                                                                                                                                                                                                                                        ",
      "UNITDESC_SEG": "HOWELL ST ON RP BETWEEN HOWELL ST AND I5 SB                                                                                                                                                                                                                    ",
      "INSTDATE": null,
      "EXPDATE": null,
      "STATUS": " ",
      "STATUSDT": null,
      "CONDITION": " ",
      "CONDDT": null,
      "OWN": " ",
      "LSTVERIFY": null,
      "MAINTBY": " ",
      "ADDBY": "GARCIAA",
      "ADDDTTM": "2010-01-21T00:00:00Z",
      "MODBY": null,
      "MODDTTM": null,
      "BR_NBR": 935,
      "BR_CODE": " 935",
      "BR_TYPE": "ST",
      "BR_NAME": "YALE AVE BR REV LANE OC",
      "BR_FACILITIES": "YALE AVE-SR 5 ON RAMP",
      "BR_FEATURES": "SR 5 REV LANE",
      "BR_RATING": 0,
      "BR_INSET": 1,
      "BR_GEO": "DT",
      "BR_OWNER": "DOT",
      "BR_OWNER_NAME": "State of Washington",
      "GEOBASID": 0,
      "XGEOBASID": 0,
      "GISSEGKEY": 489781,
      "EARTHQUAKE_RESPONSE_TEAM": " ",
      "SHAPE_Length": 220.11891836147655
  },
  "geometry": {
      "type": "LineString",
      "coordinates": [
          [
              -122.329201929090928,
              47.616910448708538
          ],
          [
              -122.329206483407461,
              47.616976719821004
          ],
          [
              -122.32921802149356,
              47.617042137515213
          ],
          [
              -122.329236413912909,
              47.617105967923777
          ],
          [
              -122.329261454336034,
              47.617167494985758
          ],
          [
              -122.329292861855023,
              47.617226028479571
          ],
          [
              -122.329330284134699,
              47.617280911766009
          ],
          [
              -122.329373301365223,
              47.617331529154569
          ],
          [
              -122.329421430971635,
              47.617377312810319
          ],
          [
              -122.329474133027375,
              47.617417749124023
          ],
          [
              -122.32953081631139,
              47.617452384473893
          ]
      ]
  }
},

Menata gaya fitur data polyline

Cuplikan berikut menerapkan gaya yang sama secara langsung ke semua fitur data.

Kotlin

private fun styleDatasetsLayer() {

  // Create the style factory function.
  val styleFactory = FeatureLayer.StyleFactory { feature: Feature ->

    // Check if the feature is an instance of DatasetFeature.
    if (feature is DatasetFeature) {

      return@StyleFactory FeatureStyle.Builder()
        // Define a style with green stroke with a width of 4.
        .strokeColor(0xff00ff00.toInt())
        .strokeWidth(4F)
        .build()
    }
    return@StyleFactory null
  }

  // Apply the style factory function to the feature layer.
  datasetLayer?.setFeatureStyle(styleFactory)
}

Java

private void styleDatasetsLayer() {

  // Create the style factory function.
  FeatureLayer.StyleFactory styleFactory = (Feature feature) -> {

    // Check if the feature is an instance of DatasetFeature.
    if (feature instanceof DatasetFeature) {

      return new FeatureStyle.Builder()
        // Define a style with green stroke with a width of 4.
        .strokeColor(0xff00ff00)
        .strokeWidth(4)
        .build();
    }
    return null;
  };

  // Apply the style factory function to the feature layer.
  datasetLayer.setFeatureStyle(styleFactory);
}