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Tuesday, February 14, 2012

Mapping Valentine's Day - Bonne's Projection


Happy Valentine's Day - link to Bonne's Projection.

From Wikipedia:
A Bonne projection is a pseudoconical equal-area map projection, sometimes called a dépôt de la guerre or a Sylvanus projection. Although named after Rigobert Bonne (1727–1795), the projection was in use prior to his birth, in 1511 by Sylvano, Honter in 1561, De l'Isle before 1700 and Coronelli in 1696[1].
The projection is:
x = \rho \sin E\,
y = \cot \varphi_1 - \rho \cos E\,
where
\rho = \cot \varphi_1 + \varphi_1 - \varphi\,
E = \frac {\lambda \cos \varphi} {\rho}
and φ is the latitude, λ is the longitude from the central meridian, and φ1 is the standard parallel of the projection[2].
Parallels of latitude are concentric circular arcs, and the scale is true along these arcs. On the central meridian and the standard latitude shapes are not distorted.
Special cases of the Bonne projection include the sinusoidal projection, when φ1 is zero, and the Werner projection, when φ1 is π/2. The Bonne projection can be seen as an intermediate projection in the unwinding of a Werner projection into a Sinusoidal projection; an alternative intermediate would be a Bottomley projection[3]

Friday, February 10, 2012

Mapping Dance Moves - Step By Step for Pulp Fiction & Napoleon Dynamite

Found this one from FlowingData, made me think of Maroon 5's recent song "Moves like Jagger". If you want to take on some "cult classic" moves from Pulp Fiction and Napoleon Dynamite ... read on.



Full credits to Niege Borges - buy his prints here.
 

Mapping the Earth - Blue Marble v.2.0

Another stunning image from NASA's Earth Oberservatory site. The below highlights and links documents the imagery collection.


Quick "Cut & Paste" Highlights:
" .... The image above, of Earth’s eastern hemisphere, was built from data collected by the Suomi NPP satellite, which flies in a polar orbit at an altitude of 824 kilometers (512 miles). The perspective of this new image, however, is from 12,743 kilometers (7,918 miles) above a point at 10 degrees South latitude and 45 degrees East longitude."

".....Kuring managed to “step back” from Earth by combining data from six separate orbits Suomi NPP made on January 23, 2012. The natural-color images come from the Visible Infrared Imaging Radiometer Suite (VIIRS) on the satellite. The four vertical lines of haze are caused by sunglint, the reflection of sunlight off the ocean."




"The graphic above illustrates how separate images in red, green, and blue wavelengths are combined to make natural-color imagery, and how multiple, adjacent swaths—slices of Earth viewed on each satellite pass—get built into a composite. The width of the swaths covered by each pass of VIIRS is about 3,001 kilometers (1,865 miles)...."

Full article - click here

Credits:
Image by NASA/NOAA. Caption by Aries Keck and Mike Carlowicz. Suomi NPP is the result of a partnership between NASA, NOAA and the Department of Defense.
Instrument: Suomi NPP - VIIRS

Wednesday, February 08, 2012

Mapping the Republican Delegate count - A Race to 1144

Here is a good link to the Republican Delegate count race to 1144 - the number required to win the GOP nomination.

Watch this space .... the interactive "play historical gains by state" make it a neat way to monitor change is delegate voting preferences by candidate & region of the country.



Taken from the NY Times Politics section for the 2012 election.