# 2+ Normally works like a clock starting at north (Not Always) so SL2 is north slough, S元 is east slough, SL4 is to the south and so on. # 1 Is normally the center of the area, so SL1 is central Slough The exact system is unknown, however its the last that is hard to work out.
#Us zip code maps code#
# corosponds to a sub office (SL1, SL2, S元, SL4 (which are clearly defined corosponds to a Street, so from a post code thats only 7 chars long, you can get the exact street name (big streets have more than one postcode). How does it corosponds to a master sorting office, (HU = HULL, SL=Slough, RG=Reading) The UK is atually based on a different system thats very easy to guess where places are. Maps for a dozen more countries are now online. Updates : changed projection, higher resolution images, added borders backdrop, improved coloring, added AK and HI. Stefan Zeiger has produced a ZIPScribble Map of Germany, and also a map of area codes. There is also the Travelling Presidential Candidate Map and the growing ZIPScribble map family. But it sure is surprising and interesting, rather like a fractal image. The pictures are not interactive (though there is an interactive version as well), but they do allow some insight into the patterns created by the numbers. Is this visualization? Sure, because it shows data.
#Us zip code maps pdf#
Here are these two states, they will eventually be included in the map above, and also a PDF of them will be available. ( ZIPScribble Map B/W with Borders) ( ZIPScribble Map Color with Borders PDF)Īs some of the comments below have mentioned, Alaska and Hawaii are missing from this map.
Since the lines between the denser areas could still be artifacts, let’s add a backdrop to see if they really are state lines. The colored version looks more interesting, but also looks much more like any other map than the monochrome version. The scribble quality is much more apparent from the monochrome version (nobody has lots of differently colored pens lying around). For the non-US folks (like yours truly), it makes sense to add state names for better readability, and also to disambiguate some problems with the rather simplistic coloring algorithm.Īdding the colors clearly adds information, but it also removes some of the mystery. Not surprisingly, some of the white lines really separate states, others don’t. So let’s enhance the map, and see if those apparent borders are in fact state lines or just artifacts. The scribbling quality of the lines (looks like somebody was bored while talking on the phone) lead to the clever name for the map. The patterns and density distribution are readily apparent, and can in fact be seen much better than when only the dots are drawn.
So off I went on a little programming exercise to see what simply connecting the dots would do. Jeffrey Heer has reimplemented zipdecode using his prefuse toolkit, and provides a file containing ZIP codes and coordinates. What it does not give you, however, is an idea of the overall structure of the ZIP space.
That little applet allows you to explore the ZIP codes interactively, and reveals some very interesting patterns. The idea for the ZIPScribble came from playing with Ben Fry’s excellent zipdecode. What would happen if you were to connect all the ZIP codes in the US in ascending order? Is there a system behind the assignment of ZIP codes? Are they organized in a grid? The result is surprising and much more interesting than expected.
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