fromData<T extends Geometry> static method

Feature<T> fromData<T extends Geometry>(Map<String, dynamic> data, { TextReaderFormat<FeatureContent> format = GeoJSON.feature, CoordRefSys? crs, Map<String, dynamic>? options, })

Decodes a feature with the geometry of T from data conforming to format.

Data should be a JSON Object as decoded by the standard json.decode().

When format is not given, then the feature format of GeoJSON is used as a default.

Use crs to give hints (like axis order, and whether x and y must be swapped when read in) about coordinate reference system in text input.

Format or decoder implementation specific options can be set by options.

Examples:

// a feature with an id and a point geometry (2D coordinates)
Feature.fromData(
  format: GeoJSON.feature,
  {
    'type': 'Feature',
    'id': '1',
    'geometry': {
      'type': 'Point',
      'coordinates': [10.0, 20.0]
    }
  },
);

// a feature with properties and a line string geometry (3D coordinates)
Feature.fromData(
  format: GeoJSON.feature,
  {
    'type': 'Feature',
    'geometry': {
      'type': 'LineString',
      'coordinates': [
        [10.0, 20.0, 30.0],
        [12.5, 22.5, 32.5],
        [15.0, 25.0, 35.0]
      ]
    },
    'properties': {
      'textProp': 'this is property value',
      'intProp': 10,
      'doubleProp': 29.5,
      'arrayProp': ['foo', 'bar']
    }
  },
);

Implementation

static Feature<T> fromData<T extends Geometry>(
  Map<String, dynamic> data, {
  TextReaderFormat<FeatureContent> format = GeoJSON.feature,
  CoordRefSys? crs,
  Map<String, dynamic>? options,
}) =>
    FeatureBuilder.fromData<Feature<T>, T>(
      data,
      format: format,
      crs: crs,
      options: options,
    );