Four short links: 18 November 2009

Web Time Travel, UK Map Data Liberation, Streetview Mashups, 3D Retail

1. Memento: Time Travel for the Web -- clever versioning hack that uses HTTP's content negotiation to negotiate about the date!
2. Ordnance Survey Maps to Go Online -- The prime minister said that by April he hoped a consultation would be completed on the free provision of Ordnance Survey maps down to a scale of 1:10,000, (not the scale of a typical Landranger map set at 1:25,000). The online maps would be free to all, including commercial users who, previously, had to acquire expensive and restrictive licences at £5,000 per usage, a fee many entrepreneurs felt was too high. No word yet on license. (more details here)
3. Mapsicle -- open source Javascript library to create mashups and application on Google Streetview, from NZ developers Project X. It has been released by Google as part of the Maps Utility library.
4. Freedom of Creation Shop -- online store for 3D-printed objects. (via Makezine).