# Apache SIS 1.0 API

Overview of Apache SIS™ (Spatial Information System).

### Requirements

SIS requires Java 8 Standard Edition.

### Classes naming

Implementations of GeoAPI interfaces usually (but not always) begin with `Abstract`, `Default`, `Simple` or `General` prefix. The `Abstract` prefix is used when a class is abstract according ISO specifications - it may or may not be be abstract in the Java sense. The `General` prefix is used when an implementation is designed for use in the general case, as opposed to other implementations specialized for a fixed number of dimensions or other conditions. Implementations specialized for a fixed number of dimensions are suffixed with `1D`, `2D`, `3D` or `4D` rather than being prefixed.

Classes that are not GeoAPI implementation are usually not prefixed by any of the above.

All Packages Applications Data storage Coverage and raster Feature and Geometry Referencing Metadata Utilities Profiles
Package | Description
--- | ---
org.apache.sis.console | Command line interface for Apache SIS.
org.apache.sis.coverage | Functions that associates positions within a bounded space (its domain) to values (its range).
org.apache.sis.coverage.grid | A coverage backed by a regular grid.
org.apache.sis.distance |
org.apache.sis.feature | Defines the structure and content of views of real-world phenomenon.
org.apache.sis.feature.builder | Helper classes for creating `FeatureType` instances.
org.apache.sis.geometry | Basic geometric objects (envelopes and direct positions).
org.apache.sis.image | Provides helper classes for handling Java2D rendered images together with some operations.
org.apache.sis.index.tree | A simple quadtree implementation.
org.apache.sis.io | Extensions to standard Java I/O (`Reader`, `Writer`, `Appendable`).
org.apache.sis.io.wkt | Well Known Text (WKT) parsing and formatting.
org.apache.sis.math | A set of mathematical objects and algebraic utilities.
org.apache.sis.measure | Units of measurements, values related to measurement (like angles and ranges) and their formatters.
org.apache.sis.metadata | Root package for various metadata implementations.
org.apache.sis.metadata.iso | Root package for ISO 19115 metadata about resources (data or services).
org.apache.sis.metadata.iso.acquisition | Information about the measuring instruments, the platform carrying them, and the mission to which the data contributes.
org.apache.sis.metadata.iso.citation | Reference to the data or service (citation, responsible party, contact information).
org.apache.sis.metadata.iso.constraint | Information about legal and security constraints placed on data.
org.apache.sis.metadata.iso.content | Description of the dataset content.
org.apache.sis.metadata.iso.distribution | Information about the options for obtaining a resource (data or service).
org.apache.sis.metadata.iso.extent | Information about spatial, vertical, and temporal extent.
org.apache.sis.metadata.iso.identification | Information to uniquely identify the data or service.
org.apache.sis.metadata.iso.lineage | Information about the sources and production processes of a dataset.
org.apache.sis.metadata.iso.maintenance | Information about the frequency and scope of data updates.
org.apache.sis.metadata.iso.quality | Information about data quality, accuracy and consistency of a dataset.
org.apache.sis.metadata.iso.spatial | Information about the mechanisms (grid or vector) used to represent spatial data.
org.apache.sis.metadata.sql | An implementation of Metadata interfaces fetching the data from an SQL database.
org.apache.sis.parameter | Descriptions and values of parameters used by a coordinate operation or a process.
org.apache.sis.profile.france | French extensions defined by the Association Française de Normalisation (AFNOR).
org.apache.sis.profile.japan | Japanese extensions to netCDF reader.
org.apache.sis.referencing | Base classes for reference systems used for general positioning.
org.apache.sis.referencing.crs | Coordinate Reference System (CRS) definitions as coordinate systems related to the earth through datum.
org.apache.sis.referencing.cs | Coordinate System (CS) definitions as the set of coordinate system axes that spans the coordinate space.
org.apache.sis.referencing.datum | Relationship of a `CoordinateSystem` (an abstract mathematical entity) to the earth or other system.
org.apache.sis.referencing.factory | Creates Coordinate Reference System (CRS) objects from given properties or authority codes.
org.apache.sis.referencing.factory.sql | Factories for geodetic objects defined in a SQL database, typically the EPSG dataset.
org.apache.sis.referencing.gazetteer | Mapping between geographic identifiers (addresses, grid indexes…) and locations (descriptions, coordinates…).
org.apache.sis.referencing.operation | Relationship between any two Coordinate Reference Systems (CRS).
org.apache.sis.referencing.operation.builder | Helper classes for creating Math Transforms from a set of points.
org.apache.sis.referencing.operation.matrix | Matrix implementations for spatiotemporal referencing.
org.apache.sis.referencing.operation.projection | Map projection implementations.
org.apache.sis.referencing.operation.transform | Conversions or transformations of multi-dimensional coordinate points.
org.apache.sis.setup | Provides information and some controls about SIS configuration.
org.apache.sis.storage | Data store base types for retrieving and saving geospatial data in various storage formats.
org.apache.sis.storage.earthobservation | Metadata readers for some format used in Earth observation (Landsat, MODIS).
org.apache.sis.storage.event | Provides interfaces and classes for dealing with different types of events fired by resources.
org.apache.sis.storage.geotiff | Maps ISO metadata elements from/to the GeoTIFF tags.
org.apache.sis.storage.gps | Structures related to Global Positioning System (GPS).
org.apache.sis.storage.netcdf | Maps ISO metadata elements from/to the Climate and Forecast (CF) attributes in a netCDF file.
org.apache.sis.storage.sql | Data store capable to read and create features from a JDBC connection to a database.
org.apache.sis.util | Simple data objects and miscellaneous utilities.
org.apache.sis.util.collection | Addition to the collection framework.
org.apache.sis.util.iso | Implementations of GeoAPI types from the `org.opengis.util` package.
org.apache.sis.util.logging | Extensions to the JDK logging framework.
org.apache.sis.xml | Provides methods for marshalling and unmarshalling SIS objects in XML.