The Shape of Alpha




             Aaron Straup Cope Where 2.0 May 2009
Hi, my name is Aaron
“The problems they have with labeling and handling contested
categories is a problem with all categorization systems since...
Metadata is worldview
“Location versus place”
Reverse geocoding
Bounding boxes
Inappropriate touching
Whoʼs on first?
The reality
The “reality”
Synthetic telepathy
continent


                                 country


                            region


                       county ...
North America        24865672


                               United States         23424977


                          ...
Buckets of points
Connect the dots?
Alpha shapes!
the
          “mastro”




Bag of optimizations?
IF YOU LIVED HERE!!!




  (Corrections)
Clustr
$> clustr -h

clustr 0.21 - construct polygons from tagged points
written by Schuyler Erle

(c) 2007-2009 Yahoo!, Inc.



...
You are here
Donut holes
The absence and the anchor
No, really
No GIS data was harmed
api = Flickr.API(...)

req = Flickr.API.Request(method='flickr.places.getInfo', woe_id=3534)
res = api.execute_request(req)...
mar23   -3.589138    37.176615
mar23   8.55027 47.410359
mar23   104.91085     11.565471
mar23   76.487388     12.860738
m...
clustr = wsclustr.ec2(access_key='...', secret_key='...')

clustr.startup(ami='ami-4d769124')




                  MAPS  ...
mmmmm....data
/services/shapefiles/1.0
                 www.flickr.com
Psychosynthography
Naked Lunch City
“Constellations of connections”
“Becoming the territory”
Thank you
http://blog.flickr.net/en/2009/02/24/an-abundant-present/                                                                  ...
The Shape of Alpha
The Shape of Alpha
The Shape of Alpha
The Shape of Alpha
The Shape of Alpha
The Shape of Alpha
The Shape of Alpha
The Shape of Alpha
The Shape of Alpha
The Shape of Alpha
The Shape of Alpha
The Shape of Alpha
The Shape of Alpha
The Shape of Alpha
The Shape of Alpha
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The Shape of Alpha

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Transcript of "The Shape of Alpha"

  1. 1. The Shape of Alpha Aaron Straup Cope Where 2.0 May 2009
  2. 2. Hi, my name is Aaron
  3. 3. “The problems they have with labeling and handling contested categories is a problem with all categorization systems since the world began. Metadata is worldview; sorting is a political act. [...] would love to avoid those problems if they could – who needs the tsouris? — but they canʼt. No one gets cataloging “right” in any perfect sense, and no algorithm returns the “correct” results. We know that, because we see it every day, in every large-scale system we use. No set of labels or algorithms solves anything once and for all; any working system for showing data to the user is a bag of optimizations and tradeoffs that are a lot worse than some Platonic ideal, but a lot better than nothing.” Clay Shirky
  4. 4. Metadata is worldview
  5. 5. “Location versus place”
  6. 6. Reverse geocoding
  7. 7. Bounding boxes
  8. 8. Inappropriate touching
  9. 9. Whoʼs on first?
  10. 10. The reality
  11. 11. The “reality”
  12. 12. Synthetic telepathy
  13. 13. continent country region county maybe “metropolitan area” locality and airports (and “hollywood”) neighbourhood
  14. 14. North America 24865672 United States 23424977 California 2347563 San Francisco 12587707 “San Francisco Bay Area” “we suck” San Francisco 2487956 The Mission 2452334
  15. 15. Buckets of points
  16. 16. Connect the dots?
  17. 17. Alpha shapes!
  18. 18. the “mastro” Bag of optimizations?
  19. 19. IF YOU LIVED HERE!!! (Corrections)
  20. 20. Clustr
  21. 21. $> clustr -h clustr 0.21 - construct polygons from tagged points written by Schuyler Erle (c) 2007-2009 Yahoo!, Inc. code.flickr.com Usage: clustr [-a <n>] [-p] [-v] <input> <output> -h, -? this help message -v be verbose (default: off) -a <n> set alpha value (default: use quot;optimalquot; value) -p output points to shapefile, instead of polygons
  22. 22. You are here
  23. 23. Donut holes
  24. 24. The absence and the anchor
  25. 25. No, really
  26. 26. No GIS data was harmed
  27. 27. api = Flickr.API(...) req = Flickr.API.Request(method='flickr.places.getInfo', woe_id=3534) res = api.execute_request(req) SHAPES xml = elementtree.ElementTree.parse(res) shpfile = xml.find(“.//shapedata/url”)
  28. 28. mar23 -3.589138 37.176615 mar23 8.55027 47.410359 mar23 104.91085 11.565471 mar23 76.487388 12.860738 mar23 -122.413369 37.780475 mar23 8.55027 47.410359 mar23 8.55027 47.410359 mar23 -0.134603 51.510198 mar23 8.55027 47.410359 mar23 103.531723 10.601642 mar23 -0.878477 49.370609 mar23 -38.730154 -12.53831 POINTS mar23 127.127265 37.534776 mar23 -2.231297 53.465333 mar23 5.312672 60.399144 mar23 -0.651283 38.060864 mar23 4.417362 51.89821 mar23 -38.730154 -12.53831 mar23 11.249792 43.781857 mar23 -3.589138 37.176615 mar23 -2.292194 53.463448 mar23 -73.984658 40.727205
  29. 29. clustr = wsclustr.ec2(access_key='...', secret_key='...') clustr.startup(ami='ami-4d769124') MAPS (FROM SCRATCH) for a in (100, 10, 1, 0.1) : shpfile = clustr.clustr('/path/to/points.txt', alpha=a) clustr. shutdown()
  30. 30. mmmmm....data
  31. 31. /services/shapefiles/1.0 www.flickr.com
  32. 32. Psychosynthography
  33. 33. Naked Lunch City
  34. 34. “Constellations of connections”
  35. 35. “Becoming the territory”
  36. 36. Thank you
  37. 37. http://blog.flickr.net/en/2009/02/24/an-abundant-present/ http://www.flickr.com/photos/straup/3182764164/ http://www.flickr.com/photos/mbiddulph/2716828710/ http://www.flickr.com/photos/timo/sets/72057594109532582/ http://www.flickr.com/photos/straup/3377702505 YOU SHALL KNOW US BY OUR TOOLS http://www.shirky.com/weblog/2009/04/the-failure-of-amazonfail/ http://www.flickr.com/photos/straup/3180283176/ http://www.flickr.com/photos/lunchwithcandy/2680466572/ http://www.flickr.com/photos/straup/3504862388/ http://www.flickr.com/photos/nickisconfused/3291840240/ http://www.flickr.com/photos/straup/3504929546/ http://www.guardian.co.uk/media/pda/2009/jan/30/mobilephones-startups http://www.flickr.com/photos/straup/3505864039/ http://www.flickr.com/photos/sarahnw/3086144646/ http://www.flickr.com/photos/auggie_tolosa/3025514778/ http://www.flickr.com/photos/_mia/3445220156/ http://www.flickr.com/photos/ajagendorf25/3457595954/ http://biogeo.berkeley.edu/gadm/ http://www.flickr.com/places/France/ http://blip.tv/file/969021/ http://www.flickr.com/photos/straup/3504858798/ http://www.flickr.com/photos/mbiddulph/416190643/ http://www.flickr.com/photos/straup/3442514097/ http://aaronland.info/talks/#where08 http://www.flickr.com/photos/straup/3444418523/ http://www.flickr.com/photos/angermann/3455505520/ http://strangemaps.wordpress.com/2009/03/30/270-palestines-island-paradise-now-with-a-word-from-its-creator/ http://www.flickr.com/photos/straup/3133070488/ http://www.flickr.com/photos/straup/3204132340/ http://cgm.cs.mcgill.ca/~godfried/teaching/projects97/belair/alpha.html http://www.flickr.com/services/api/flickr.places.getInfo.html http://code.flickr.com/blog/2008/08/08/location-keeping-it-real-on-the-streets-yo/ http://code.flickr.com/blog/2009/04/07/the-only-question-left-is/ http://www.slideshare.net/straup/the-interpretation-of-bias/33 http://www.aaronland.info/weblog/2009/04/12/hammock/#py-wsclustr-php http://www.flickr.com/photos/straup/3084890631/ http://www.mapsfromscratch.com/ http://code.flickr.com/svn/trunk/clustr/ http://www.flickr.com/photos/straup/3437832035/ http://www.flickr.com/places/US/ http://www.flickr.com/photos/dianeperson/3356117774/ http://www.flickr.com/places/US/TX/ http://www.flickr.com/photos/nitelynx/44189973/ http://www.flickr.com/places/HKG/ http://www.flickr.com/photos/straup/3459117321/ http://www.flickr.com/photos/straup/3466918414/ http://www.flickr.com/photos/dogseats_bike/2999571556/ INSERT BAJA CANADA JOKE HERE http://www.flickr.com/photos/theincidental/3467181477/ http://magicalnihilism.wordpress.com/2009/04/23/the-map-becoming-the-territory/ http://www.flickr.com/photos/timo/2912270910/ http://www.aaronland.info/talks

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