actinia and plugins

Current plugins:

• https://github.com/mundialis/actinia-module-plugin
• https://github.com/mundialis/actinia-metadata-plugin
• https://github.com/mundialis/actinia_satellite_plugin
• https://github.com/mundialis/actinia_statistic_plugin
• https://github.com/mundialis/actinia-stac-plugin

The plugins require some modules from actinia_core. For an overview, see here: https://github.com/mundialis/actinia_core/blob/main/src/actinia_core/README.md