[Routing] Crowdsourced costing - offer of writing a client+metric for it

Sascha Silbe sascha-ml-gis-osm-routing at silbe.org
Wed Dec 3 11:42:31 GMT 2008


On Wed, Dec 03, 2008 at 12:11:46PM +0100, Marcus Wolschon wrote:

> I tried to not make it to make my firt draft not too
> fine-grained due to privacy and not-enough-data -concerns.

> We can have a * day =
> (weekday,weekend,holiday,beforeHoliday,afterHoliday,schoolVacation,beforeSchoolVacation,afterSchoolVacation)
> ** weekday (mo,...sa,so)
That's better, though you still miss some cases (e.g. the christmas 
shopping period). In addition, the user is required to enter more data, 
making it more likely (s)he just doesn't bother enough to submit the 
data.
How about just making the (full) date field optional? Send it by 
default, but give the user the choice of anonymizing the data.

[Vandalism]
> We do have the option of ignoring that part for a prototype for the
> time being and care about it later.
That's probably the best option. I'm not sure how much storing the IP 
address would help anyway since a malicious user can upload from many 
different IP addresses anyway (anonymizer networks, "Call by call" 
dial-up ISPs, ...). Statistical filtering might (or might not) be much 
better at getting the junk out (though probably only if the noise level 
is low enough).

> The server need never hand out data of a single upload.
> To be meaningfull it even needs to be averaged for many
> users.
To be useful to a single end-user, it needs to be aggregated some way, 
yes. But there are many ways to aggregate the data, so tool developers 
would want excerpts of the raw data as well.

> I suggested soap because it is supported by many
> systems, it is type-safe and trivial to check and
> there is good tooling.
Type-safety is certainly good to have. Though I'd rather like a format 
that can be used for offline storage and exchange as well...

CU Sascha

-- 
http://sascha.silbe.org/
http://www.infra-silbe.de/
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