[MAPSERVER-USERS] Any other Routing solution than pgRouting/Oracle NDM ?

[Stephen Woodbridge]

riteshambastha wrote:
> Thanks Steve,
> 
> Route computation is taking an average time of 1.2 sec.
> Post this, showing route on the browser takes a lot of time. 
> I am not using kamap xml overlay and any lib of openlayers. 
> 
> I am posting this route result xml into a db, and allowing a map file to
> read this db and show the route on map.
> I know this is not an efficient way to do the job. 

I would start by adding some timing to a log file so you KNOW where your 
time is getting spent, then work on optimizing the larger times.

I think this is the fastest way to go unless the route is relatively 
small in the number of nodes in the polyline. You should look at getting 
rid of the xml, in fact, why are you going to xml at all and then 
putting it back into the database. The data is being generate in the 
database then you extract it and format it into xml and then put the xml 
back into the database for mapserver to pick up. I think you should just 
put it into a table of routes with a unique sessionid+routeid key then 
pass the key to mapserver to use on selecting the right record.

> I got to know that openlayers libs can help me to achieve the same. I want
> to know how in-efficient will be to use kamap xml overlay instead of any fn
> of openlayers.

You can server the route as a wfs layer, but if it is complicated it 
might be too many points to handle quickly in the browser.

-Steve

> Regards,
> Ritesh Ambastha
> 
> Stephen Woodbridge wrote:
>> riteshambastha wrote:
>>> Dear friends, 
>>>
>>> I have seen routing based on postgis routing and oracle network data
>>> models.
>>> Even though, they serve the purpose very efficiently, they take some
>>> 1sec/2sec/3sec to display the routes. I checked them with OpenLayers and
>>> Ka-map. Still, I feel there must be a way to reduce this route display
>>> time.
>>> Is there any any other ways to show routing/directions over mapserver
>>> based
>>> maps? Any other data structure and programming in C/python can serve the
>>> purpose ?
>> What is taking too long?
>> 1) is it the route computation
>> 2) transfering the route data to OpenLayers
>> 3) rendering the route data as a vector layer
>>
>> Have you considered writing some code on the server that generates an 
>> image file from the route data and returns a url for the image that can 
>> be then pinned to OpenLayers like a marker? You could do this by writing 
>> a wrapper in your favorite scripting language around the request to 
>> generate the route.
>>
>> -Steve W
>> _______________________________________________
>> mapserver-users mailing list
>> mapserver-users at lists.osgeo.org
>> http://lists.osgeo.org/mailman/listinfo/mapserver-users
>>
>>
>