Worldmap, on es poden fer i compartir mapes, i un d'ells es el de tweets


"The WorldMap platform is being developed by the Center for Geographic Analysis (CGA) at Harvard to lower barriers for scholars who wish to explore, visualize, edit, collaborate with, and publish geospatial information.

WorldMap is Open Source software.

The system attempts to fill a growing niche between powerful desktop-bound mapping applications, and lightweight web map solutions with limited capacity.

If you find WorldMap data or technology useful in your research we would love to hear from you.  Understanding how the system is being used and where it needs improvement is critical as we evolve the system together. "