Thursday, March 5, 2015

C-Squares For Extremely Fast, Condensed GIS Data

See here - innovation from Australia.

At the moment the primary purpose of saving location coordinates in VOS is to record shortwave contacts and radio signals on a central SVG (Raphael display) map where you can view overall statistics to see where the largest number of survivors are still transmitting. You will also be able to attach data received from radio transmissions to illustrate what cities got hit the hardest, highest background radiation, etc. and other arbitrary notes. This could be invaluable in building a profile of what areas are safest or in recovery and what is to be avoided at all costs. Even if you never go there, it is information that can be passed along to other hams to help them understand what has happened in their own countries.

Stored in this format you can keep and search large sets of GIS data with little overhead for complexity. Microsoft SQL Server has a special datatype for this reason to support GIS data and optimize SQL queries but with the C-Squares format it is trivial and has none of these requirements.

A candidate for inclusion in the first version of VAULT-OS.


Russell said...

Every once in awhile something like this comes along and make me think the world isn't such a bad place, after all.

Do you know if this is being used anywhere today? The FAQ was from 2003, which is a geologic age in tech.

Tony Rees said...

Hi, Yes I developed c-squares in 2003 - to fill the empty spot between e.g spreadsheets and fully spatial databases - it is still in use in a couple of "legacy-ish" systems but others have gone for full spatial databases in the main. All I can say is, take a look and see if it still looks useful to you in 2015, or if there are better directions to go in (the encoding/decoding is siple and not fixed to a particular technology or point in time). Regards - Tony Rees, Austreralia