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 {@code Abstract}, {@code Default}, {@code Simple} or {@code General} prefix. The {@code 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 {@code 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 {@code 1D}, {@code 2D}, {@code 3D} or {@code 4D} rather than being prefixed.

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