GeoPackage is an open, standards-based, platform-independent, portable, self-describing, and compact format for transferring geospatial information. It is defined by the Open Geospatial Consortium (OGC). A GeoPackage file is essentially a SQLite database container that can store vector features, tile matrix sets of imagery and raster maps, and non-spatial attributes. It's designed to be a single file that can be easily shared and used across different platforms and software. GeoPackage is particularly useful for mobile applications, offline data access, and interoperability between different GIS systems. It supports both vector and raster data, making it a versatile format for various geospatial applications. The format is designed to be efficient for storage and retrieval of geospatial data, making it suitable for large datasets. It is also designed to be easily extensible, allowing for the addition of new data types and features as needed. GeoPackage is becoming increasingly popular as a standard format for geospatial data due to its open nature, portability, and versatility.