SpatialIndex class abstract

The basic operations supported by classes implementing spatial index algorithms.

A spatial index typically provides a primary filter for range rectangle queries. A secondary filter is required to test for exact intersection. The secondary filter may consist of other kinds of tests, such as testing other spatial relationships.

@version 1.7

Implementers

• Quadtree
• STRtree

Constructors

SpatialIndex()

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

insert(Envelope itemEnv, Object item) → void

Adds a spatial item with an extent specified by the given {@link Envelope} to the index

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

query(Envelope searchEnv) → List

Queries the index for all items whose extents intersect the given search {@link Envelope} Note that some kinds of indexes may also return objects which do not in fact intersect the query envelope.

queryWithVisitor(Envelope searchEnv, ItemVisitor visitor) → void

Queries the index for all items whose extents intersect the given search {@link Envelope}, and applies an {@link ItemVisitor} to them. Note that some kinds of indexes may also return objects which do not in fact intersect the query envelope.

remove(Envelope itemEnv, Object item) → bool

Removes a single item from the tree.

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited