emperor's new architecture research

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====== Indoor positioning systems for Android ======

===== Foot Path =====

  * [[http://www.comsys.rwth-aachen.de/research/projects/footpath/|FootPath]]: a project developed at the Aachen University; 
  * **infrastructure-less tracking**: starts from a known point and with a floor plan; uses accelerometer+gyroscope to determine the path taken from the starting point; 
  * **+** doesn't need to be online, doesn't need any additional information about the environment; 
  * **-** needs a map to be pre-uploaded;
  * **-** error adds up;
 TEST:
  * cloned the [[https://github.com/COMSYS/FootPath|github]] project, imported in Eclipse
  * downloaded a map using JOSM (download here and run: java -jar josm-tested.jar)
  * replaced the value in Loader.java, line 200 with the name of the map (epflmap)
  * chmod +x update-revfile.sh, run ./update-revfile.sh
  * restart Eclipse, run the app.
  * it crashes, on all phones, immediately :(
  * there is a version of FootPath in playstore, this one works well enough to test;
  * 
===== Red Pin =====

  * [[http://redpin.org/|Red Pin]]
  * **wi-fi fingerprint based**

TEST

  * installed Subclipse svn plugin for Eclipse
  * eclipse freezes :(
  * downloaded a clean version of Eclipse from [[https://www.eclipse.org/subversive/previous-releases.php]] (my Eclipse: Juno); installed Subversive plugin
  * checked out the Redpin Code using Import > SVN > [[svn://svn.code.sf.net/p/redpin/code/]]
  * changed Android target in rghtclck+Project > Properties > Android > select an existing Android (4.3)
  * running RedPinAndroid 75 crashes immediately, [[redpin-error-log|error log]]

  * cannot start the server from Eclipse; 
  * when running Redpin from an .apk, server is not reachable; I assume I have to start a redpin server.
===== IDocent =====

  * [[http://www.egr.msu.edu/classes/ece480/capstone/spring11/group02/|IDocent]] developed at Michigan State University, aimed at guiding blind people around buildings, has a text-to-speech engine;
  * uses **wi-fi triangulation** and custom maps;
  * watch video here http://www.youtube.com/watch?v=OV-9OPnu3cM 

TEST

  * dwloaded the [[http://www.egr.msu.edu/classes/ece480/capstone/spring11/group02/documents/iDOCENT.zip|zip file for Android]] 
  * imported the project into Eclipse and set the target Android version
  * run as application on Motorola test phone; 
  * iDocent freezes, then has to quit because it's not responding; :( ([[idocent-error-log|the log]])
===== TeroM IPS =====

https://github.com/TeroM/indoor-position-tracker

===== a little bit of microsoft input: RADAR =====

triangulation systems based on signal strength http://research.microsoft.com/en-us/projects/radar/

===== the calculation =====

how to calculate the geographic midpoint for two or more points on the earth's surface; how to calculate the center of minimum distance; how to calculate the average latitude/longitude
http://www.geomidpoint.com/calculation.html

===== MORE =====

  * WIGGLE: a contribution based map of wireless access points. https://wigle.net/
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