# GeoAPI 2.1.1 API

Spatial Referencing by Coordinates
org.opengis.parameter: Description and storage of parameter values.
org.opengis.referencing: Reference systems.
org.opengis.referencing.crs: Coordinate reference systems (coordinate systems with a datum).
org.opengis.referencing.cs: Coordinate systems and their axis.
org.opengis.referencing.datum: Geodetic datum (the relationship of a coordinate system to the earth).
org.opengis.referencing.operation: Coordinate operations (relationship between any two coordinate reference systems).
org.opengis.temporal

Geometry and topology
org.opengis.geometry: Root package for geometries.
org.opengis.geometry.aggregate: Aggregations of geometric objects.
org.opengis.geometry.complex: Set of primitive geometric objects whose interiors are disjoint.
org.opengis.geometry.coordinate: Set of geometric objects.
org.opengis.geometry.primitive: Set of geometric objects that are not decomposed further into other primitives.

Feature and filter
org.opengis.feature: Representation a features on a map.
org.opengis.feature.display: Root package for feature display services.
org.opengis.feature.display.canvas: Canvas for features and its layers.
org.opengis.feature.display.canvas.web: Canvas for features on the web.
org.opengis.feature.simple
org.opengis.feature.type: Captures the generic feature model from ISO 19109 with allowances for usability.
org.opengis.filter: Filters features according their properties.
org.opengis.filter.capability
org.opengis.filter.expression: An expression is a combination of one or more elements that evaluate to single `Object` value.
org.opengis.filter.identity: An Identifier indicates object identity requested during data query or reference.
org.opengis.filter.sort: An SortBy indicates the ordering requested during a data query.
org.opengis.filter.spatial: A spatial operator determines whether its geometric arguments satisfy the stated spatial relationship.

Grid Coverage
org.opengis.coverage: Coverages (generate a value for any point).
org.opengis.coverage.grid: Quadrilateral grid coverages.
org.opengis.coverage.processing

Meta Data
org.opengis.metadata: Root package for metadata.
org.opengis.metadata.citation: Citation and responsible party information.
org.opengis.metadata.constraint: Constraints information (includes legal and security).
org.opengis.metadata.content: Content information (includes Feature catalogue and Coverage descriptions).
org.opengis.metadata.distribution: Distribution information.
org.opengis.metadata.extent: Extent information.
org.opengis.metadata.identification: Identification information (includes data and service identification).
org.opengis.metadata.lineage: Lineage information.
org.opengis.metadata.maintenance: Maintenance information.
org.opengis.metadata.quality: Data quality and positional accuracy.
org.opengis.metadata.spatial: Spatial representation information (includes grid and vector representation).

Styling and web services
org.opengis.layer: Basic unit of geographic information that may be requested as a map from a server.
org.opengis.layer.source: Sources of layers.
org.opengis.sld: Allows user-defined symbolization of feature data.

Display objects
org.opengis.go
org.opengis.go.display
org.opengis.go.display.canvas
org.opengis.go.display.canvas.map2d
org.opengis.go.display.canvas.map2d.web
org.opengis.go.display.canvas.web
org.opengis.go.display.event
org.opengis.go.display.primitive
org.opengis.go.display.primitive.store
org.opengis.go.display.style
org.opengis.go.display.style.event
org.opengis.go.spatial

Other Packages
org.opengis.annotation: Set of annotations mapping GeoAPI interfaces to OpenGIS UML or XML schemas.
org.opengis.util: A set of utilities classes and interfaces for OpenGIS interfaces.

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