Ok, I think I've got it. The problem I was having with the SpatialRelator transformer was that it does not seem to be able to compare points to lines.
To solve the problem I applied the Bufferer transformer to my lines and used the generated areas as the candidate features in my SpatialRelator. I also changed the test parameter to WITHIN (i.e., "Is the BASE within S ground units of the CANDIDATE line segment?"). By this method I was able to create the relationships that I expected. Is this a known limitation of the SpatialRelator? Thom --- In [email protected], "Thom DeCarlo" <[EMAIL PROTECTED]> wrote: > > I'm real close now, but I can't seem to make the SpatialRelator work > properly. I'm using the input line segments to generate the 2D points > via the CoordinateFetcher and 2DPointReplacer. I eliminate duplicate > nodes with the Matcher and then use the remaining points as the Base > for the SpatialRelator and the original lines as the Candidates. But, > regardless of which test I perform (touches, contains, intersects, > etc) I always get 0 related candidates. Am I using this thing > incorrectly? (I can provide the data and workspace if that would help.) > > Thanks! > Thom > > --- In [email protected], "mark2atsafe" <mark.ireland@> wrote: > > > > That's exactly what I wrote in the update request: "the geometry > > already matches the required network, and all overlaps are genuine" > > > > To create end nodes you can either use the Chopper or - a better > > solution I think - grab the coords with the CoordinateFetcher and > > write them with the 2DPointReplacer. > > > > I'll let you know the response to the update request. Obviously if you > > can come up with a compelling business case there is more chance of it > > being implemented. Anyone else in the group need this function? > > > > Mark > > > > --- In [email protected], "Thom DeCarlo" <t.r.decarlo@> wrote: > > > > > > I think the problem is that the TopologyBuilder is smarter than i need > > > it to be. My line network is already "clean" in that the lines connect > > > and their endpoints are the only things I want to calculate upon. > > > > > > I'm not certain, but it *looks* like I can use the > > > SpatialRelationshipFactory to build the topology. If I can create > > > seperate node features for each line endpoint, I can pass the nodes > > > and lines through seperate counters to provide unique ids and then use > > > the node as the base and the line as the candidate for the > > > SpatialRelator. > > > > > > Is there a factory that will generate nodes from the endpoints of > lines? > > > > > > But, it might take two passes through the SpatialRelator, because the > > > nodes must know what lines they touch and the lines must know what > > > nodes they touch. > > > > > > Thanks! > > > Thom > > > > > > --- In [email protected], "mark2atsafe" <mark.ireland@> wrote: > > > > > > > > Bah! You can tell that first glance was the only one I took! > > > > > > > > In that case I don't believe there is anything you can do; the two > > > > functions appear to be mutually exclusive. Of course you could > always > > > > number the nodes manually and then apply the values to the lines. > > > > Wouldn't be too hard to do. > > > > > > > > In the meantime I can file a request to implement such > functionality. > > > > > > > > Regards, > > > > > > > > Mark > > > > > > > > > > > > --- In [email protected], "Thom DeCarlo" <t.r.decarlo@> wrote: > > > > > > > > > > Hey Mark, > > > > > At first glance the results looked good. The lines crossed without > > > > > producing nodes at the intersections while the endpoints generated > > > > nodes. > > > > > > > > > > However, the connectivity is now broken. All of the lines say > > that the > > > > > "_from_node" is 1 and the "_to_node" is 2. Is there something > else I > > > > > can do to generate the complete endpoint connectivity structure? > > > > > > > > > > Thanks! > > > > > Thom > > > > > > > > > > --- In [email protected], "mark2atsafe" <mark.ireland@> wrote: > > > > > > > > > > > > Hi Thom, > > > > > > I think you can do what you want quite easily. > > > > > > > > > > > > Run all of your line features through a Counter to give them a > > > unique > > > > > > ID (unless they have one already). > > > > > > > > > > > > Then set the TopologyBuilder group-by to use the unique ID. > > > > > > > > > > > > Doing this will exclude overlapping lines from the node > > generation; > > > > > > overlaps would only get noded where their IDs are the same. > > However, > > > > > > nodes are still created where end-points meet. > > > > > > > > > > > > Hope this helps, > > > > > > > > > > > > Mark > > > > > > > > > > > > Mark Ireland, Product Support Engineer > > > > > > Safe Software Inc. Surrey, BC, CANADA > > > > > > support@ http://www.safe.com > > > > > > Solutions for Spatial Data Translation, Distribution and Access > > > > > > > > > > > > > > > > > > --- In [email protected], "Thom DeCarlo" <t.r.decarlo@> wrote: > > > > > > > > > > > > > > Hi, > > > > > > > Now that I've finally gotten my line network mostly cleaned > > up I'm > > > > > > > trying to figure out how to work with the TopologyBuilder. > > > Right off > > > > > > > the bat the first problem I'm having is that I only want to > > > generate > > > > > > > nodes where line endpoints touch either other endpoints or > other > > > > > > > lines. I *don't* want to generate nodes where lines cross > > lines. > > > > > > > > > > > > > > Is there any way to do this with the TopologyBuilder? Or is > > there > > > > > > > another factory that can do this? I don't see anything in the > > > > > > > documentation to help me here. > > > > > > > > > > > > > > Thanks, > > > > > > > Thom > > > > > > > > > > > > > > > > > > > > > > > > > > > > Get the maximum benefit from your FME, FME Objects, or SpatialDirect via our Professional Services team. Visit www.safe.com/services for details. Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/fme/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
