clusters 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:

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

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:

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:

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

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.