The Voronoi diagram idea of Dave T works in principle but there remain some pretty sizeable PO Box Zip Codes. But the basic idea works, I am making a grid over the map, tagging the square the PO Box zip is in, exporting the selection set and combing with the full polygon Zip Code file. Or clipping with the grid. This is the theoretical plan at this moment - thanks, and thanks to Dave Dick ________________________ Forward or reply from: Dick Hoskins EMS/Trauma WA DOH, Olympia (360) 236-2873 [EMAIL PROTECTED] _________________________
________________________________ From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Wednesday, August 06, 2008 12:16 PM To: [email protected] Subject: RE: [Maptitude] Point zips and poly zips Hi Dick, I used that same approach for combining a number of points and polys into a single layer at the Mass Historical Commission. I added 25 millionths (.000025) to the point coordinate in both directions. Works well. Of course you have do to it in the DK. Larry Manire From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of HealthMaps Sent: Wednesday, August 06, 2008 11:46 AM To: [email protected] Subject: [Maptitude] Point zips and poly zips I have a layer of PO Box Zip Codes. Points. One for polygon Zips. I need to have them all in one layer. Seems the solution would be to turn the point layer into a polygon layer - very small polygons and then combine somehow. Any ideas how I might do this? Dick Hoskins Olympia, WA
