Heat map also from data already uploaded

[GoogleCodeExporter]

Create the heat maps (especially for cellular) not only from the active session 
but also from previous sessions already uploaded to openbmap.

It's frustrating to start at zero every time after uploading data - and 
openbmap doesn't offer comparable heat maps yet.

Original issue reported on code.google.com by ms2618...@gmail.com on 30 Sep 2013 at 5:04

[GoogleCodeExporter]

Sorry - don't know how to set the type "Enhancement". It's of course no "defect"

Original comment by ms2618...@gmail.com on 30 Sep 2013 at 5:10

[GoogleCodeExporter]

Original comment by wish7code on 30 Sep 2013 at 11:18

• Changed state: Accepted
• Added labels: Type-Enhancement
• Removed labels: Type-Defect

[GoogleCodeExporter]

re0167996e204 seems to be the one in which this was added, and it might be the 
reason the app got unusable for me with the most recent upgrade, especially if 
multiple measurements for one and the same WiFi need to be evaluated on the 
fly. (I do have quite an amount of data in my DB, as I have never deleted my 
track logs.)

As a suggestion for improvement: do not use the track logs to get past session 
data, but process that data into a kind of local WiFi catalog, having the same 
DB schema as the downloaded one but created from local data. (Toby, you have my 
instructions for rendering data with Mapnik - the first steps load data from 
XML files into a DB, process it and add all new WiFis to the catalog. I have 
used this extended catalog with earlier versions of Radiobeacon and had no 
issues.) This kind of processing can be done as part of the upload.

Original comment by mich...@vonglasow.com on 19 Oct 2013 at 7:29

[GoogleCodeExporter]

> re0167996e204 seems to be the one in which this was added, and it might be 
the reason the app got unusable for me with the most recent upgrade, especially 
if multiple measurements for one and the same WiFi need to be evaluated on the 
fly. 

I can't remember exactly which release made it to F-Droid. More recent versions 
have a layer selector above the map view to turn off on-the-fly evaluation

> do not use the track logs to get past session data, but process that data 
into a kind of local WiFi catalog

This will be the way to go. I'm already testing this, but there are still some 
glitches.. Will follow in one of the releases..

> Toby, you have my instructions for rendering data with Mapnik

Did you sent something? Especially I would be interested in how you get Mapnik 
to render wifi position data? I've already loaded the data into a SpatialLite / 
PostGIS, but I'm no Mapnik expert, so I don't have a clue how to proceed..

Original comment by wish7code on 21 Oct 2013 at 8:09

• Changed title: Heat map also from data already uploaded

[GoogleCodeExporter]

Just resent it (to your gmail account), in case the first one didn't make it. 
Be sure to check your spam folder, just in case...

Sorry about the delay, I've started a new job in October, which is cutting down 
on my spare time...

Original comment by mich...@vonglasow.com on 27 Oct 2013 at 7:11