Java interfaces are provided in release 3.0.2 of GeoAPI, which can be downloaded from Maven Central Repository with the following coordinates:
<dependencies> <dependency> <groupId>org.opengis</groupId> <artifactId>geoapi</artifactId> <version>3.0.2</version> </dependency> </dependencies>
The Javadoc is available online.
The usage examples provide starting points for applying coordinate operations (e.g. map projections) and for fetching some metadata.
Upgrade to latest standard versions, Python interfaces and bridge between Java and Python are in progress. This work is described in GeoAPI developments page.