# Apache SIS 1.1 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.

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.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.filter
Filters features according their properties.
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 k-dimensional point tree implementation.
org.apache.sis.io
Extensions to standard Java I/O (`Reader`, `Writer`, `Appendable`) and `Format`.
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.openoffice
Apache SIS services made available to Apache OpenOffice or LibreOffice.
org.apache.sis.parameter
Descriptions and values of parameters used by a coordinate operation or a process.
org.apache.sis.portrayal
Symbology and map representations, together with a rendering engine for display.
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.landsat
Reader of Landsat 8 level 1-2 data.
org.apache.sis.storage.netcdf
Reads netCDF files conforming to the Climate and Forecast (CF).
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.