Hi Dave, Thanks for the idea of using the split function, it had not occurred to me. I'm going to give it a try.
Thanks again, Ryan Morgan Aerials Express www.AerialsExpress.com -----Original Message----- From: David Reid [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 17, 2003 2:16 AM To: 'Ryan Morgan, Aerials Express' Subject: RE: MI-L Automatic Square Quartering? Ryan, I'm ashamed to admit it but I couldn't think of a more elaborate way than to just have to get out the elbow grease and do this the hard way. I only had about 700 sections to quarter though. Here's what I did. First I visually checked that all the centroids of my sections "looked centered". As you are probably aware, many times when a polygon object is created, it's centroid is not center. To center it, one has to convert the polygon/region to a polyline, then back to a polygon, this generally recenters the centroid. Ok, Naturally I saved a copy of my sections table to work on. In this editing table I created a xcord ycord column and updated those with the section's centroid x & y I then created a second working table as a points only table. For this table, I simply selected all the sections, then used "Edit" "Clear map objects only". Then I did a "Create Points" function on the centroid columns created and updated earlier. I then opened my first sections editing table with the polygons, then on top of that, I opened my new points table. In the costmetic layer and using the polygon tool, I began creating the first of two separate huge "patchwork" polygons. To try and elaborate. I began creating the first polygon by snapping nodes to the "Sections" centroid objects. On the vertical I went up the centroids on the first column of "Sections" then back down the centroids of the second column of "Sections. Going past the outermost boundary of each end. I would then skip over to the centroids of the third column of sections and repeat the process for this the third column and the fourth. I did this the entire width (west to east) of my county. I then made my "Sections" table editable, selected all sections, targeted them, then "Split" them based on the huge "sideways E" polygon I created in the costmetic layer, thus splitting all sections into "East & West Halfs". WHEW... I then repeated this creating this big poly in the cosmetic layer but now to split the section halfs thus creating four quarters. Maintaing a specific order to my "Splitting" I did manage to update my new quarter sections with "NW NE SE SW" appropriately and in a short amount of time, it just took some 'fiddling' with various syntax in the Update function of MI. Again, this is not a pretty way of doing this but for me, it was quicker than trying to develop an MBX to do the job. I call this "Arts & Crafts GIS" as the process is rather simple minded :)) HTH, Dave -----Original Message----- From: Ryan Morgan, Aerials Express [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 16, 2003 4:38 PM To: MapInfo-L Subject: MI-L Automatic Square Quartering? Hi all, I'm stuck. I'm trying to quarter a township, range, and section grid to show a NW, NE, SW, and SE quarter in a separate layer. Is there an easy way of doing this? I'm looking at close to 20,000 cells, way too many to do by hand. TIA and Happy Holidays! Ryan Morgan Aerials Express www.AerialsExpress.com --------------------------------------------------------------------- List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Message number: 9588 --------------------------------------------------------------------- List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Message number: 9604
