GGZ Import

[aa1vs]

Problem Statement

OpenSAK cannot import GGZ files. To move large databases from other applications that are not GSAK it is a valid format choice. Also a GGZ file created by one opensak user cannot be ingested by another.

Proposed Solution

As a GGZ file is basically a zip file with multiple GPX files inside it, it should be simple to add this to the existing zip ingestion.

[aa1vs]

This may be similar under the hood to the solution required for #573

[pjacklam]

The GGZ format doesn't include child waypoints, so I fail to see why the GGZ format is useful for transferring databases – unless you don’t care about child waypoints, of course.