Thanks Bryan - it is the ATS 2.2 and the ATS Master grid that I'm working with. I have a couple of approaches that I can try, hopefully over the next couple of weeks. I'll let you know how things turn out.
Lyndon --- In [email protected], "Bryan Waller" <[EMAIL PROTECTED]> wrote: > > Hello Lyndon, > > > > I have had this same issue in the past and since we work in the same > town and industry, I bet we are dealing with the same grid. I have > mapped out how I think I will approach this when I get time, so it may > or may not work, but it is a skeleton of an idea. > > > > * Convert the grid to Lat/Long, because this made the data much > `squarer'. > * Create a bounding box, holding the attribute for the unique parcel ID > that is bound. > * Extract the coordinates for the original polygons, keeping the vertex > number and the unique parcel ID. > * Extract the max_x/max_y (NE) coordinate from the bounding box. > * Reproject the attributes and geometry into something that can be > measured on the ground (10TM?). > * Use the nearest neighbour finder to find the nearest coordinate that > has a matching unique parcel ID. > * Playing with the distance and angle settings, it should be possible > to get close to 99% (I think except if you are dealing with > Saskatchewan, the survey system there gets messy). > > > > Feel free to give me a call if this doesn't make sense or if I am > totally out to lunch. > > > > Regards, > > > > Bryan > > > > > > > > Bryan Waller, GIS Manager > > Midwest Surveys Inc. > > [EMAIL PROTECTED] > > ph.403.735.9344 (direct) > > ph.403.244.7471 (main) > > ph.403.830.6517 (cellular) > > fax.403.244.2466 > > www.midwestsurveys.com/ > > > > > > _____ > > From: koklyndon [mailto:[EMAIL PROTECTED] > Sent: January 2, 2007 8:57 AM > To: [email protected] > Subject: [fme] Re: Extract NE cornder of polygon > > > > Hans, > > I wish it were that simple, but the NE corner is not necessarily the > same as the point defined by _xmax and _ymax. For example, create a > polygon with points (0 0 3 0 2 1 1 1 0 0). The results of the > BoundsExtractor are _xmax=3 and _ymax=1. But the actual NE corner, > the one that I am looking for, has coordinates 2,1. It's a bit of an > extreme example, but the survey grid I'm working with has numbers > polygons of this type. > > Regards, > > Lyndon Kok > > --- In [EMAIL PROTECTED], Hans van der Maarel <hans@> wrote: > > > > Lyndon, > > > > > Hi all, I have a polygon dataset, and I am trying to extact the NE > > > corner of each of the polygons in the dataset. The polygons are > > > rectangular (it is a survey grid dataset), but each polygon may > have > > > any number of points (i.e. not just corner points). Any ideas on > how to > > > accomplish this? > > > > The BoundsExtractor will extract the coordinates of the lower left > and > > upper right corner. Upper right (_xmax and _ymax) is the one you're > > looking for. > > -- > > Hans van der Maarel > > Red Geographics > > > > Zevenbergsepoort 44b www.redgeographics.-com > > 4791 AE Klundert hans@ > > The Netherlands phone: +31-168-401035 > > > For insights into what's up at Safe Software and what's on the development horizon, visit Safe's blog at spatial-etl.blogspot.com. Safe Software has also made slides available that outline enhancements planned for FME 2007. The slides are from the "Road Ahead" presentation given on Day 2 of the FME Worldwide Users Conference. To view these slides, visit www.safe.com/2006uc. Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/fme/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/fme/join (Yahoo! ID required) <*> To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] <*> 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/
