What tools exist now, to generate c-squares codes?
CSIRO Marine and Atmospheric Research (CMAR) has developed c-squares encoders for lat/lon pairs (points), lines, poly-lines, and filled polygons, which are currently available as web utilities accessible via the link “lat/long to c-square converter” on the resources page – the user can input (for example) a lat/lon pair or polygon boundary, and the equivalent c-square code(s) will be returned. The source code for encoding point data is publicly available as an example, at http://www.marine.csiro.au/csquares/resources.html; that for lines, poly-lines and filled polygons is currently at prototype stage but can be obtained on request from Tony Rees (e-mail) by anyone interested in developing it further, with a view to posting the results as a shared resource.