Osm2nds logs error and warning messages. Error messages tell you why the network couldn't be created.
Warning messages are different. There you do not have to react. However, it is strongly recommended to read every warning message. Often they tell you something about the quality of your network. Sometimes, you can adapt your configuration in order to improve your network.
Please post all messages you couldn't interpret. I will answer how to handle these messages.
i attache the logfile of my last succesfull conversion. There the warning-messages can be seen.
i am wondering: Max height and speed limit are often set to <null> because the value "none" can´t be read. So does the null still stand for an unlimited height-limit or is t zero-height and it would be better to enter a very high double-value (eg. 1000) to make sure tehre is no real limitation?
However, there isn't any unit that matches. Therefore maxheight is set to "null" which means that this road is always traversable regarding the height.
In the Network Dataset Properties (ArcCatalog > your network > Network Dataset Properties) there is the attribute "HeightRestriction". This attribute compares the MaxHeight and the current height of your vehicle. If
MaxHeight < Height
the road is restricted. Otherwise, the road is traversable.
You can define the height of your vehicle in ArcMap:
thanks again for your help. Yep when i try to run for example a service area-routing i get the following error-message: Fehler: Das Netzwerk-Dataset verfügt über keine Kantenelemente. Es ist möglicherweise nicht vorhanden.
I used another example NDS and the routing worked quite properly there
The reason is probably the missing "border_control" you suggested to add. ?!
Hey Eva! Yeah that was the solution. I was able to calculate a network without errors
Thank you very much for your patient help!
But no i have another problem and i am becoming desperate.
I think the following is not a problem concerning your gread program but i would be very thankful if you might help me.
All my service-areas and routings i tryed in GIS failed with the highway NDS is calculated out of the OSM File i cut out of the Germany-latest.osm by the tool "OSM-Filter".
Looking precisly at the roads the problem is, that often tehre are no real junctions or connections between the motorways as they should be.
Like it can be seen in the following picture: nojunction.JPG
even though i am not to firm with osmfilter, it seems like you are only exporting the actual highways, but not the links between the highways and motorways. May i suggest looking at http://wiki.openstreetmap.org/wiki/DE:Key:highway , especially the paragraph about link roads to find out, which other tags you need to add to your export. A highway (as in german Autobahn) normaly consists of two things: the actual road (highway=motorway) and the on/off ramps/junctions (highway=motorway_link/trunk_link/ primary_link)
I always recommend getting at least a little bit familiar with the osm nomenclature when working with the data.