Oyster and new fares - question

I read the Evening Standard yesterday, namely the article about rising tube fares.
And one thing I don't understand ... Evening Standard mentioned all the fares - daily, one-time fares, weekly but mentioned nothing about monthly travel cards. Why?? I mean what kind of people use weekly travel cards? Maybe just a few. At the same time all the regular tube users surely use either monthly travelcards or pay-as-you-go?

What kind of travelcard do you use? Do you think there are more people using weekly cards then those usign monthly cards?

art

I like the phrase that Ben Lewis published in yesterday's Evening Standard (which is BTW free now) and that is expressing one of the main functions of art:
"In a super-fast broadband culture, art is really good for delivering messages at speed. A movie takes an hour to watch - you can understand a Warhol in seconds"

Oyster



All these TFL-people in the Tube who are collecting statistics, asking passengers questions like "where did you board the train", "what is your destination" etc. Why don't they use Oyster-based statistics?
No proper data miners in the Transport For London?

The Prime Meridian - it is not where you think it is

There is a green laser beam that goes from Greenwich Royal Observatory into the sky over London to mark the path of the Prime Meridian. The light is said to be visible for more than 10 miles. However, it happened that on the way of the beam, on the north bank of the river Thames there is a new development that consists of 3 buldings all together named Electron Tower. The most west of the towers was built last and has a distinctive feature on it’s front – there is a vertical steel line that goes from the bottom to the very top of the building and denotes the Prime Meridian. 

Now, what do you think happened with the laser beam after building works were completed? Do you think designers of the building foreseen the case and get builders to drill a small hole in the building, so the laser beam could happily go through to the Essex. No, not at all. Instead, as we recently found, the laser is now beamed into the empty space slightly off the right side of the tower! Which means that it doesn’t mark the Prime Meridian anymore! It is easy to see if you take a look at the front of the building at night, you can see the steel line and green laser beam at the same time and there is a certain distance between them. 

Also, you might be not aware that there are actually at least two different “0” Meridians: one is the Greenwich Prime Meridian and another one is the IERS Reference Meridian (IRM). First (Greenwich) is astronomical meridian and it is fixed for every point on Earth. The second one(IRM) is geodetic and is not fixed to any point on Earth. IRM is used almost everywhere: for nautical navigation, air navigation, GPS, Google Maps etc. Because tectonic plates slowly move northeast over the surface of the Earth with a speed of 2.5 cm per year you would expect that the difference between Greenwich Prime Meridian (that is fixed for any point on surface of the Earth) and IRM (that is not fixed for points on surface of the Earth but fixed to the Earth ellipsoid) should be slowly reducing over time. However, it is maintained constant by yearly adjustment made by IERS.

To cut the long story take a look at the screen-shot from the Google Earth below. It shows one of the Docklands areas where there is a line on the ground denotingGreenwich Meridian and at the same time you can see IRM used by Google 100 meters to the east from the Greenwich Meridian. 



The detailed explanation of the differences between Greenwich Prime Meridian and Reference Meridian you can find at 
http://en.wikipedia.org/wiki/Prime_Meridianand http://en.wikipedia.org/w/index.php?title=Prime_Meridian&oldid=195405612