Holy books


Dialogo sopra i due massimi sistemi del mondo (Dialogue Concerning the Two Chief World Systems), by Galileo Galilei.


Philosophiæ Naturalis Principia Mathematica (Mathematical Principles of Natural Philosophy), by Isaac Newton.


De Revolutionibus Orbium Coelestium (On the Revolutions of the Celestial Spheres), by Nicolas Copernico.

And another one from Tycho Brahe for which I unfortunately don’t have a proper picture.

We saw them all yesterday at the James Melville Gilliss Library, as part of a tour to the United States Naval Observatory (USNO)–the institution in charge of providing precise time (the “Master Clock”) to the GPS system.

If there’s such a thing as a holy book, now I know what’s to be before a few of them.


Straight to the map

OK, this is pretty cool:

GPS and photos with the N78

Yesterday I went to watch Ironman and on my way back home I decided to take some crappy pictures every 5 minutes to test the mobile’s GPS. The map above is the result (click to get the actual one): the trail starts at the cinema in the top-right region, and finishes in my place at the bottom-left.

To get the map I didn’t have to do anything special. Just uploaded the photos to Picasa and you’re done (I couldn’t make it work with Flickr yet). You get a map with your photos georeferenced, and a automatic KML in case you prefer using the Google Earth imagery.

During the last months at the office we’ve spent a considerable amount of work georeferencing our data and putting it on maps. A problem we’ve detected is that workers in the field do not have the necessary devices (software, GPS) to enhance the data-collecting or the post-processing. I can’t wait to see this technologies reaching the field.