GeoNetwork is a standards based, Free and Open Source catalog application to manage spatially referenced resources through the web. It provides powerful metadata editing and search functions as well as an embedded interactive web map viewer.
Technical Specification
GeoNetwork opensource implements both the Portal component and the Catalog database of a Spatial Data Infrastructure (SDI) defined in the OGC Reference Architecture. It provides tools for managing and publishing metadata on spatial data and related services. GeoNetwork opensource allows a distributed search providing access to a huge volume of metadata that come from different Clearinghouses and also provides a web-based interactive map viewer that allows people to composite maps picking layers from distributed servers on the internet
Marble is a Virtual Globe and World Atlas that you can use to learn more about Earth: You can pan and zoom around and you can look up places and roads. A mouse click on a place label will provide the respective Wikipedia article.
It’s also possible to measure distances between locations or watch the current cloud cover. Marble offers different thematic maps: A classroom-style topographic map, a satellite view, street map, earth at night and temperature and precipitation maps. All maps include a custom map key, so it can also be used as an educational tool for use in class-rooms. For educational purposes you can also change date and time and watch how the starry sky and the twilight zone on the map change.
In opposite to other virtual globes Marble also features multiple projections: Choose between a Flat Map (”Plate carré”), Mercator or the Globe.
The best of all: Marble is Free Software / Open Source Software and promotes the usage of free maps. And it’s available for all major operating systems (Linux/Unix, MS Windows and Mac OS X).
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