<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman,new york,times,serif;font-size:12pt">Dear List,<br><br>It's my first time question. Its' about 1 year that I'm using Grass 6.4 RC5 and Qgis 1.4 under my ubuntu 9.04<br>I'm a user and not a software expert<br><br>At the moment I'm working on a little project and I have to prepare routes for workers, they have to visit many spot in one area.<br><br>I decided to use network analyst and use v.net.salesman<br><div><br>The dataset is:<br> - [layer A] map of the routes (topology ok)<br> - [layer B] point layer with the place to be visited<br><br>for first I use 'v.net op= connect (treshold=500)' to connect all the layer B to the Layer A<br>this command woks good and have not problems, also when I look at the new layer I don't see any problems, using 'v.category op=report' I receive good news<br><br>I run 'v.net.salsesman'
<br>(v.net.salesman -g input=net_siniscola_nord@nuoro output=salesman_siniscola_nord type=line alayer=1 nlayer=2 ccats=1-506) <br><br>using the layer created by v.net and I receive this error:<br><br>----------------------------<br>Number of cities: [505]<br>Building graph...<br>Registering arcs...<br><br><br><br>Flattening the graph...<br><br><br>Graph was built<br><br>Destination node [551] is unreachable from node [605]<br clear="all">
-------------------------------------------------------------------------------<br><br>I don't understand why!?!<br><br>- Is possible look where are the node mentioned abve because I don't find any connection beetween that code with id or cat codes in the table?<br>- Is possible check the net to be shure that the topology is real correct?<br><br>I also try:<br>- to restrict the cat number (eg. 1-100 instead 1-506) and sometimes works<br>- to use another dataset that last year worked, and this year gives problems<br>- to create (digitize) a little linear (10 segments, topology ok) and point layer (70 points), crate the net using v.net op=connect, and after win v.net.salesman and I have the same errors<br><br>I'm becaming a little bit crazy....!<br><br>I hope to be clear and I'm sorry for my english but I'm not very well<br><br>I hope also that somebody can help me because the workers are waiting for my lists and at the moment I'm not able to prepare for
them and I don't understand why.<br><br>thanks in advance to everybody<br>Regards<br>Gianluca<br></div>
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