[pgrouting-users] How to merge GPS traces which are close to each other

[Stephen Mather]

The openstreetmap community has also done some good practical work in this
domain.

Best,
Steve
On Apr 2, 2014 1:09 PM, "Stephen Woodbridge" <woodbri at swoodbridge.com>
wrote:

> On 4/2/2014 12:16 PM, Raghavan Krishnasamylakshmanaperumal wrote:
>
>> Hello Everyone,
>>
>> I have raw GPS points collected from runkeeper(runner/biker) traces.
>>  From these points I am creating linestrings and on linestrings I am
>> applying pgr_nodeNetwork to create the network edge table and then
>>   using pgr_createTopology to build the topology with source and target
>> information.
>>
>> How can I merge the gps traces which are close to each other, for
>> example look at the picture which I have attached in which there are 3
>> GPS traces(red,green,blue) which are close to each  and while forming
>> the network graph I want these traces to be considered as a single
>> trace(as shown in black color). It will be better to get the average of
>> those 3 GPS traces to form a single GPS trace by this way I may get rid
>> of the noise on the GPS traces obtained from runkeeper.
>>
>> Is there a function in pgRouting to make this possible?
>>
>
> No pgRouting does not have a function for this. While it would be useful,
> I think it falls more under PostGIS because this is a geometry problem.
>
> I will also note that the problem is not well defined. Consider the case
> where you have an exit ramp the parallels the highway for some time before
> connecting to a cross road or veering away from the highway. In this case
> how does one determine where to make the intersection of the ramp and
> highway?
>
> Ask the PostGIS list for some ideas. You might also ask GRASS GIS list
> they might have some tools for this.
>
> -Steve
>
> _______________________________________________
> Pgrouting-users mailing list
> Pgrouting-users at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/pgrouting-users
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/pgrouting-users/attachments/20140402/7d6dba71/attachment.html>