Indoor positioning systems for Android
Red Pin
october 2014 → ? USING REDPIN
MEASUREMENTS
december 12, BC building; performed 4 measurements all lasting about 2 minutes. kept track of the movement by hand (noted positions and times on a peace of paper) and compared that to the data the app sent to the server; results can be found here
measurement tests 12.12.2014
OTHER POSSIBLY USEFUL APPS:
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
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;
IDocent
TeroM IPS
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
conclusions
need something closest to the TeroM tool + a general map of the space; map the space out (preset points and scan the db at each point); load all this information in the app (with an option to edit or re-measure db strengths);