Steve, You may be stuck splitting the calculations out into separate streams and then using FeatureMergers to join the summed data back together with the original polygon IDs.
Jason -----Original Message----- From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of stevendorner Sent: Monday, November 28, 2005 10:50 To: [email protected] Subject: [fme] Re: Summing Attributes for PointOnAreaOverlayer? Mark, Thanks for the advice. That worked great except I have several fields that I want to sum on. When I tried to add a second ListSummer for the next attribute it actually creates new rows in my output with the correct sum but the other field=zero. Is there some way to get a single ListSummer to sum two fields? I'm close though, very close. Thanks, Steve --- In [email protected], "mark2atsafe" <[EMAIL PROTECTED]> wrote: > > Hi Steve, > Set a list name in the point-on-area settings dialog. That will create > a list of all points attached to the polygon. Then use a ListSummer > transformer to add together the attribute values in that list. > > Hope this helps, > > Mark > > Mark Ireland, Product Support Engineer Safe Software Inc. Surrey, BC, > CANADA [EMAIL PROTECTED] http://www.safe.com Solutions for Spatial Data > Translation, Distribution and Access > > --- In [email protected], "stevendorner" <[EMAIL PROTECTED]> wrote: > > > > > > FME Gurus, > > > > I am relatively new to FME although I took the class last year. I'm > > having trouble with what may be a relatively simple operation. > > Simply put, I am trying to do a point-on-poly overlay and sum up > > attribute values of the points for each polygon feature. Each > > polygon can have thousands of points inside it. I know how to use > > the PointOnAreaOverlayer to grab point attributes and apply them to > > the polygon attributes but and I need to sum the values, not just > > map them one to one. I can't seem to figure this out from either my > > class notes or the docs. If anybody out there has any advice I > > would really appreciate it. > > > > Thanks! > > > > Steve Dorner > > ESRI Professional Services > > 8615 Westwood Center Drive > > Vienna, VA 22182-2214 > > Office: 703-506-9515 x8130 > > Mobile: 703-629-4238 > > [EMAIL PROTECTED] > > > 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/
