[Qgis-user] Re: Qgis-user Digest, Vol 64, Issue 47

[James David Smith]

Dear Alex and Alexander,

Thank you for your assistance regarding my problem. I do still have
access to ArcGIS, so I will dump the entire network to a shapefile.
Given that it is the entire London road network, I am a bit concerned
that it will perhaps be too large (?) but I will try.

Once I have it as a Shape, could I then use 'Spit' to move it into
PostGIS do you think? I am doing some analysis in PostGIS at the
moment, so if I could do most of my network analysis in PostGIS that
would be great (though would also like to use QGIS for visualisation).
I will also try using the RoadGraph plugin which I looked at earlier
and it looked simple to use.

Regards

James


>   3. Re: Integrated Transport Network (Alex Mandel)
>
> Message: 3
> Date: Tue, 21 Jun 2011 01:46:51 -0700
> From: Alex Mandel <tech_dev at wildintellect.com>
> Subject: Re: [Qgis-user] Integrated Transport Network
> To: qgis-user at lists.osgeo.org
> Message-ID: <4E005A7B.4000607 at wildintellect.com>
> Content-Type: text/plain; charset=UTF-8
>
> I agree, dump to shp file as soon as you can, or another more
> interchangeable format. If you still have access to Arc that will make
> life easier, the OGR driver can't do everything (well not 100% sure).
>
> Once in QGIS you have the plugin already mentioned, the v.net tools in
> GRASS, pgrouting in Postgis and routing in Spatialite as potential ways
> of doing similar analysis.
>
> Enjoy,
> Alex
>
> On 06/20/2011 10:52 PM, Alexander Bruy wrote:
>> Hi,
>>
>> you can use RoadGraph plugin (Plugins-Manage plugins) to find
>> shortest paths between two points. I don't know how Integrated
>> Transport Network stored in Personal GeoDatabase, but you can
>> try to access your data with GDAL (there is a driver for this) or
>> export them to shapefile.
>>
>> Hope this helps
>>
>> 2011/6/20 James David Smith <james.david.smith at gmail.com>:
>>> Dear all,
>>>
>>> I have used ArcGIS over the last 6 months and would class myself as a
>>> beginner/intermediate, but would now like to try using QGIS instead. I
>>> have been getting on ok with it over the last few weeks, but have come
>>> to a point where I would like to load a transport network, in the way
>>> that I would have done in ArcGIS. I have the Integrated Transport
>>> Network as a Microsoft Access Database / Personal Database at the
>>> moment. Is there some way that I can load this into QGIS? And then
>>> start to do some basic network analysis such as time and distance from
>>> point 1 to point 2?
>>>
>>> Thanks for your help,
>>>
>>> James
>>