I just wanted to add my two cents. Much of my work involves splitting and combining objects. I will not use Objects>Clean because of disappearing objects. I had problems in 6.0 and 6.5 with disappearing objects when splitting objects. 7.0 and 7.5 has a different problem. It just fails to perform the splits--error occured. I manually clean my files using the Check region function. I just don't feel like searching several thousand objects to make sure they are all still there. Derek looked into my problem, but the situation has never been resolved. Steve's idea sounds logical to me, but if MI still deletes valid records, I will stay with the tried and (very slow) true method of manual corrections.
Mike Hankins Actuarial Services Analyst COUNTRY Insurance and Financial Services 309-821-2302 -----Original Message----- From: Wallace, Steve [mailto:[EMAIL PROTECTED] Sent: Wednesday, August 04, 2004 2:23 PM To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED]; Neil Gibson Subject: RE: MI-L Objects> Check regions, and objects> clean problem Derek, In this case, I don't think your reply is accurate. I just took a Florida-wide table that I know has been edited several times and ran "Objects > Clean" on it with both Overlap and Gap removal turned on, and the Maximum Gap Area set at 0.01 square miles (6.5 acres). When I ran Clean, TWO objects disappeared. After rolling back the changes, performing an Object > Overlay Nodes command, and THEN running Clean, only ONE polygon disappeared. The latter case being only half as unacceptable an outcome as the first. While I don't know how the software is engineered, I do know how it performs. -- Steve -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Wednesday, August 04, 2004 02:59 PM To: Wallace, Steve Cc: [EMAIL PROTECTED]; Neil Gibson Subject: RE: MI-L Objects> Check regions, and objects> clean problem Steve, In this case, I don't think your advice will do anything. The Clean operation actually does an OVERLAY_NODES operation as part of the processing. So doing this extra step will do nothing. The Clean operation should be designed so that if one object is completely within another, then the smaller object should survive the clean operation and a hole should be punched into the larger object. There is a chance that something is going wrong with this, and the smaller object is not surviving the process, which could eliminate the row. If there are 2 objects that exactly overlap and cover excatly the same space, one will be eliminated in the overlap elimination process. But, baring this, it is hard to say what may be happening without further investigation. Derek Snyder MapInfo Corporation Mail List: [EMAIL PROTECTED] From: on 08/04/2004 11:10 AM AST To: Neil Gibson <[EMAIL PROTECTED]>, [EMAIL PROTECTED] cc: Subject: RE: MI-L Objects> Check regions, and objects> clean problem Here's a little trick that might help you with most of the errors. 1) Make layer editable 2) Select all objects 3) Set as target 4) Select all objects (again) 5) Execute OBJECT > OVERLAY_NODES from the menu This has the effect of deleting any duplicate identical nodes in your objects. Often times those overlaps are what cause the problem. Also, this WILL NOT change actual shape of your objects, like clean may. If you have many spatial errors in a polygon (self-intersecting lines, gaps, overlaps, etc), even Overlay Nodes can cause a record to vanish, so inspect your resulting data. Hope this helps, -- Steve -----Original Message----- From: Neil Gibson [mailto:[EMAIL PROTECTED] Sent: Wednesday, August 04, 2004 10:52 AM To: [EMAIL PROTECTED] Subject: MI-L Objects> Check regions, and objects> clean problem Hi. I am having a bit of trouble with MapInfo 7, build 26, and was wondering if any of you could help? When i run the objects> check regions, I get 322 overlays and gaps from 11525 rows. However, when I try objects> clean, it wipes half of the rows off from the map. Is there any way of removing these overlays and gaps without ruining my map? Cheers Neil - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - VOTED SUPPLIER OF THE YEAR 2003 Direct Response Smart Awards - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - _________________________________________ This e-mail has been scanned for all viruses by Star Internet. The service is powered by MessageLabs. For more information on a proactive anti-virus service working around the clock, around the globe, visit: http://www.star.net.uk ________________________________________________________________________ --------------------------------------------------------------------- List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Message number: 12838 --------------------------------------------------------------------- List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Message number: 12839 --------------------------------------------------------------------- List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Message number: 12841
--------------------------------------------------------------------- List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Message number: 12843
