meta library

Functions

applyFilter(Map? properties, dynamic filter) → bool

applyFilter Takes a Map properties and a filter, Returns a bool indicating filter is applied to the properties.

clusterEach(FeatureCollection<GeometryObject> geojson, dynamic property, ClusterEachCallback callback) → void

clusterEach Takes a FeatureCollection, a dynamic property key/value used to create clusters, and a ClusterEachCallback method that takes (cluster, clusterValue, currentIndex) and Returns void. For example:

clusterReduce<T>(FeatureCollection<GeometryObject> geojson, dynamic property, ClusterReduceCallback<T> callback, dynamic initialValue) → T?

Reduces clusters in Features, similar to Iterable.reduce Takes a geojson, a dynamic porperty, a GeoJSONObject's property key/value used to create clusters, a ClusterReduceCallback method, and an initialValue to use as the first argument to the first call of the callback. Returns the value that results from the reduction. For example:

coordAll(GeoJSONObject geojson) → List<Position?>

Gets all coordinates from any GeoJSONObject. Receives any GeoJSONObject Returns List<Position> For example:

coordEach(GeoJSONObject geoJSON, Function callback, [bool excludeWrapCoord = false]) → void

Iterates over coordinates in any geoJSONObject, similar to Iterable.forEach example:

coordReduce<T>(GeoJSONObject geojson, CoordReduceCallback<T> callback, T? initialValue, [bool excludeWrapCoord = false]) → T?

Reduces coordinates in any GeoJSONObject, similar to Iterable.reduce

createBins(FeatureCollection<GeometryObject> geojson, dynamic property) → Map<dynamic, List<int>>

createBins Takes a FeatureCollection geojson, and dynamic property key whose corresponding values of the Features will be used to create bins. Returns Map<String, List

featureEach(GeoJSONObject geoJSON, FeatureEachCallback callback) → void

Iterates over features in any geoJSONObject, calling callback on each iteration. Similar to Iterable.forEach. For example:

featureReduce<T>(GeoJSONObject geojson, FeatureReduceCallback<T> callback, T? initialValue) → T?

Reduces features in any GeoJSONObject, similar to Iterable.reduce.

filterProperties(Map<String, dynamic> properties, List<String>? keys) → Map<String, dynamic>

filterProperties Takes Map<String, dynamic> properties, and List<String> keys used to filter Properties. Returns Map<String, dynamic> filtered Properties For example:

flattenEach(GeoJSONObject geoJSON, FlattenEachCallback callback) → void

Iterates over flattened features in any geoJSONObject, similar to Iterate.forEach, calling callback on each flattened feature

flattenReduce<T>(GeoJSONObject geojson, FlattenReduceCallback<T> callback, T? initialValue) → T?

Reduces flattened features in any GeoJSONObject, similar to Iterable.reduce. Takes a FeatureCollection, Feature, or Geometry a FlattenReduceCallback method that takes (previousValue, currentFeature, featureIndex, multiFeatureIndex), an initialValue Value to use as the first argument to the first call of the callback. Returns the value that results from the reduction. For example:

geomEach(GeoJSONObject geoJSON, GeomEachCallback callback) → void

Iterates over each geometry in geoJSON, calling callback on each iteration. Similar to Iterable.forEach

geomReduce<T>(GeoJSONObject geoJSON, GeomReduceCallback<T> callback, T? initialValue) → T?

Reduces geometry in any GeoJSONObject, similar to Iterable.reduce.

getCluster(FeatureCollection<GeometryObject> geojson, dynamic filter) → FeatureCollection<GeometryObject>

Get Cluster Takes a FeatureCollection<Feature> and a dynamic filter used on GeoJSON properties to get Cluster. Returns a FeatureCollection single cluster filtered by GeoJSON Properties For example:

propEach(GeoJSONObject geoJSON, PropEachCallback callback) → void

Iterates over properties in any geoJSON object, calling callback on each iteration. Similar to Iterable.forEach

propertiesContainsFilter(Map properties, Map filter) → bool

Properties contains filter (does not apply deepEqual operations) Takes a Map properties value, and a Map filter and Returns bool if filter does equal the properties For example

propReduce<T>(GeoJSONObject geojson, PropReduceCallback<T> callback, T? initialValue) → T?

Reduces properties in any GeoJSONObject into a single value, similar to how Iterable.reduce works. However, in this case we lazily run the reduction, so List of all properties is unnecessary.

segmentEach(GeoJSONObject geojson, SegmentEachCallback callback, {bool combineNestedGeometries = true}) → void

Iterates over 2-vertex line segment in any GeoJSON object, similar to Iterable.forEach (Multi)Point geometries do not contain segments therefore they are ignored during this operation.

segmentReduce<T>(GeoJSONObject geojson, SegmentReduceCallback<T> callback, T? initialValue, {bool combineNestedGeometries = true}) → T?

Reduces 2-vertex line segment in any GeoJSON object, similar to Iterable.reduce (Multi)Point geometries do not contain segments therefore they are ignored during this operation.

Typedefs

ClusterEachCallback = dynamic Function(FeatureCollection<GeometryObject>? cluster, dynamic clusterValue, int? currentIndex)

ClusterEachCallback Takes a FeatureCollection, the cluster being processed, a clusterValue used to create cluster being processed, and the currentIndex, the index of current element being processed in the List. Starts at index 0 Returns void.

ClusterReduceCallback<T> = T? Function(T? previousValue, FeatureCollection<GeometryObject>? cluster, dynamic clusterValue, int? currentIndex)

ClusterReduceCallback The first time the callback function is called, the values provided as arguments depend on whether the reduce method has an initialValue argument.

CoordEachCallback = dynamic Function(Position? currentCoord, int? coordIndex, int? featureIndex, int? multiFeatureIndex, int? geometryIndex)

CoordReduceCallback<T> = T? Function(T? previousValue, Position? currentCoord, int? coordIndex, int? featureIndex, int? multiFeatureIndex, int? geometryIndex)

Callback for coordReduce

FeatureEachCallback = dynamic Function(Feature<GeometryObject> currentFeature, int featureIndex)

Callback for featureEach

FeatureReduceCallback<T> = T? Function(T? previousValue, Feature<GeometryObject> currentFeature, int featureIndex)

Callback for featureReduce

FlattenEachCallback = dynamic Function(Feature<GeometryType> currentFeature, int featureIndex, int multiFeatureIndex)

Callback for flattenEach

FlattenReduceCallback<T> = T? Function(T? previousValue, Feature<GeometryObject> currentFeature, int featureIndex, int multiFeatureIndex)

Callback for flattenReduce The first time the callback function is called, the values provided as arguments depend on whether the reduce method has an initialValue argument. If an initialValue is provided to the reduce method:

GeomEachCallback = dynamic Function(GeometryType? currentGeometry, int? featureIndex, Map<String, dynamic>? featureProperties, BBox? featureBBox, dynamic featureId)

GeomReduceCallback<T> = T? Function(T? previousValue, GeometryType? currentGeometry, int? featureIndex, Map<String, dynamic>? featureProperties, BBox? featureBBox, dynamic featureId)

Callback for geomReduce

LocalizedCoordEachCallback = dynamic Function(Position? currentCoord, int? coordIndex, int? featureIndex, int? multiFeatureIndex, int? geometryIndex, int? localCoordIndex)

PropEachCallback = dynamic Function(Map<String, dynamic>? currentProperties, int featureIndex)

Callback for propEach

PropReduceCallback<T> = T? Function(T? previousValue, Map<String, dynamic>? currentProperties, int featureIndex)

Callback for propReduce

SegmentEachCallback = dynamic Function(Feature<LineString> currentSegment, int featureIndex, int? multiFeatureIndex, int? geometryIndex, int segmentIndex)

SegmentEachCallback

SegmentReduceCallback<T> = T? Function(T? previousValue, Feature<LineString> currentSegment, T? initialValue, int featureIndex, int? multiFeatureIndex, int? geometryIndex, int segmentIndex)

Callback for segmentReduce