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

[Saber Razmjooei]

Hi James

I guess you get a better performance with PostGIS. If you move your data
to PostGIS, you can even use pgRouting:
http://www.pgrouting.org/


Cheers
Saber


> 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
>>>
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