FeatureCollection<E extends Feature<Geometry>> class

A feature collection contains an array of Feature items.

Feature collection are bounded objects with optional bounds defining a minimum bounding box for a feature collection.

Some implementations may contain also custom data or "foreign members" containing property objects.

According to the OGC Glossary a feature collection is "a set of related features managed as a group".

Supports representing data from GeoJSON (https://geojson.org/) features.

Inheritance

Constructors

FeatureCollection(List<E> features, {Box? bounds, Map<String, dynamic>? custom}): A feature collection with an array of features with optional bounds and custom properties.

Properties

bounds → Box?: An optional bounding box explicitely set (or otherwise directly available) for this object.
no setterinherited
coordType → Coords: A value of Coords representing the coordinate type of position data contained directly or within child objects.
no setteroverride
custom → Map<String, dynamic>?: Optional custom or "foreign member" properties as a map.
no setterinherited
features → List<E>: All feature items in this feature collection.
no setter
hashCode → int: The hash code for this object.
no setteroverride
isEmptyByGeometry → bool: Returns true if this feature collection do not contain any features.
no setteroverride
length → int: The number of features in this feature collection.
no setter
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited

Methods

boundsAligned2D({Aligned align = Aligned.center, PositionScheme scheme = Position.scheme}) → Position?: Returns an aligned 2D position relative to a bounding box accessed by getBounds.
inherited
calculateBounds({PositionScheme scheme = Position.scheme}) → Box?: Calculate a bounding box for this object.
override
copyWith({List<E>? features, Map<String, dynamic>? custom}) → FeatureCollection<E>: Copy this feature collection with optional features and custom properties.
equals2D(covariant FeatureObject other, {double toleranceHoriz = defaultEpsilon}) → bool: True if this and other equals by testing 2D coordinate values of all position data (that must be in same order in both objects) contained directly or by child objects.
override
equals3D(covariant FeatureObject other, {double toleranceHoriz = defaultEpsilon, double toleranceVert = defaultEpsilon}) → bool: True if this and other equals by testing 3D coordinate values of all position data (that must be in same order in both objects) contained directly or by child objects.
override
equalsCoords(covariant FeatureObject other) → bool: True if this and other contain exactly same coordinate values (or both are empty) in the same order and with the same coordinate type.
override
getBounds({PositionScheme scheme = Position.scheme}) → Box?: Returns the current bounds if it's populated and conforms to scheme, or otherwise returns one calculated by calculateBounds.
inherited
map(E toFeature(E feature)) → FeatureCollection<E>: Returns a new feature collection with all features mapped using toFeature.
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
populated({int traverse = 0, bool onBounds = true, PositionScheme scheme = Position.scheme}) → FeatureCollection<Feature<Geometry>>: Returns a feature object of the same subtype as this with certain data members populated.
override
project(Projection projection) → FeatureCollection<E>: Returns an object of the same subtype as this with all position data projected using projection and non-positional properties left intact.
override
toBytes({required BinaryFormat<FeatureContent> format, Endian? endian, Map<String, dynamic>? options}) → Uint8List: The binary representation of this feature object, with format applied.
inherited
toString() → String: The string representation of this feature object as specified by GeoJSON.
inherited
toText({TextWriterFormat<FeatureContent> format = GeoJSON.feature, int? decimals, CoordRefSys? crs, Map<String, dynamic>? options}) → String: The string representation of this feature object, with format applied.
inherited
unpopulated({int traverse = 0, bool onBounds = true}) → FeatureCollection<Feature<Geometry>>: Returns a feature object of the same subtype as this with certain data members unpopulated (or cleared).
override
writeTo(FeatureContent writer) → void: Writes this feature object to writer.
override

Operators

operator ==(Object other) → bool: The equality operator.
override
operator [](int index) → E: The feature at the given index in this feature collection.

Static Methods

build<T extends Geometry>(WriteFeatures features, {int? count, Box? bounds, Map<String, dynamic>? custom}) → FeatureCollection<Feature<T>>: Builds a feature collection from the content provided by features.
fromData<T extends Geometry>(Map<String, dynamic> data, {TextReaderFormat<FeatureContent> format = GeoJSON.feature, CoordRefSys? crs, Map<String, dynamic>? options}) → FeatureCollection<Feature<T>>: Decodes a feature collection from data conforming to format.
parse<T extends Geometry>(String text, {TextReaderFormat<FeatureContent> format = GeoJSON.feature, CoordRefSys? crs, Map<String, dynamic>? options}) → FeatureCollection<Feature<T>>: Parses a feature collection from text conforming to format.