search

sanyaade-augmented-reality / mixare

Automatically exported from code.google.com/p/mixare
0 stars 0 forks source link

"blurred" position in get parameter #79

Open GoogleCodeExporter opened 9 years ago

GoogleCodeExporter commented 9 years ago 
As User i would like to see something like a "blurred" Position (exact
Position via GET-Parameters could be fetched by anyone!).

(mail from Chris of 2011.02.14)

Original issue reported on code.google.com by mixare.org on 4 Mar 2011 at 3:38

GoogleCodeExporter commented 9 years ago 
I find that the GPS is already adding enough noise to the requests :-)

Jokes apart, this can be added in the settings...

Original comment by mixare.org on 4 Mar 2011 at 3:39

GoogleCodeExporter commented 9 years ago 
If you want do that, i found a neat way to do that blurring:
OSM needs some Math for Tile-Numers:
http://wiki.openstreetmap.org/wiki/Slippy_map_tilenames
just do Math.round instead of Math.floor at the right place and you are done 
:-) 

Instead of latitude, longitude and radius a query could use z, x, y.
Lower zoom-level means a bigger bounding-box and more blurring.
the bounding-box consists of 4 "Tiles" where the lower right "Tile" is defined 
by x/y.

This way, your data could easily be cached (and re-mapped serverside)!

chris

Original comment by stiller....@googlemail.com on 8 May 2011 at 4:28

GoogleCodeExporter commented 9 years ago

Original comment by mixare.org on 23 Apr 2012 at 7:51

GoogleCodeExporter commented 9 years ago 
Issue 128 has been merged into this issue.

Original comment by daniele.gobbetti on 20 Jun 2012 at 3:43

GoogleCodeExporter commented 9 years ago 
Hi. A very first prototype is available in this branch:
https://github.com/mixare/mixare/tree/feature/issue79

The latitude and longitude are truncated to the second decimal position (i.e. 
roughly 250 meters from my empirical tests) before being transmitted.

This affects *only* the data that are transmitted to the servers, hence the 
markers are placed in the right spot even with this patch.

Please let me know whether you know more sophisticated rounding algorithms (the 
tiles approach would unfortunately break all the existing implementations of 
data providers!).

What's still missing is a toggle for the user.

Original comment by daniele.gobbetti on 20 Jun 2012 at 4:21

GoogleCodeExporter commented 9 years ago 
[deleted comment]
GoogleCodeExporter commented 9 years ago 
https://github.com/KlemensE/mixare/commit/a87485742cd2c88d7762d80608208c46dcafa0
54

Original comment by klemens....@gmail.com on 7 Aug 2012 at 8:35