Hi Jorge, You are right. This is the first time I've encountered this in 10+ years of MapInfo work!
The base table that I am digitising into is in a UTM Zone, while the Mapper Window is set to Long/Lat (WGS84). Arrrrrrr!!! Many thanks, Bill ================================================================= ----- Original Message ----- From: "Jorge Gil" <[EMAIL PROTECTED]> To: "Data Directions" <[EMAIL PROTECTED]>; <[email protected]> Sent: Thursday, September 15, 2005 9:26 PM Subject: RE: MI-L : The Ghost Lines of 8.0 Bill, I suspect that this problem occurs (not only in MapInfo 8.0) because the session projection is different from the table's projection. To fix this you have to set the session projection before any transformation: - If you always use the same projection system the best is to set it in "Options > Preferences... > Map Window... > Session Projection" - If you need to set it occasionally then: 1. identify the CoorSys code for the table's projection by typing in the MapBasic window: Print TableInfo("myTable",29) where myTable is the object's table name. This prints the code in the message window 2. set the session projection by typing in the MapBasic window: Set "myCoordSys" where myCoordSys is the output of the previous step Any transformation that you do to an object when the two projection systems are different causes this behaviour because the coordinates read by MapInfo are "wrong". Even if you update a column with an object's coordinates extracted with ObjectInfo() the coordinates read will be those for the session projection! It's very annoying that when you're editing a table the session doesn't simply default to that table's projection, instead the session projection defaults to whatever is set in the preferences. Regards, Jorge _________________ Jorge Gil Simulation Developer SPACE SYNTAX -----Original Message----- From: Data Directions [mailto:[EMAIL PROTECTED] Sent: 15 September 2005 13:33 To: [email protected] Subject: MI-L : The Ghost Lines of 8.0 The subject would be a great title for a Halloween query, but unfortunately I can't wait that long to post, so here goes ... Has anyone else encountered this "problem or bug" in 8.0? I digitise a line object from A to B. I then double click on the line object to open the Line Object Dialog box. I then increase the line length by typing in a new value. When I click OK, the line disappears! The only way to get it back is to use Edit > Undo Object Change. Note that If I have a Browser Window open, the record still exists. With the record selected, if I then do a Map > View Entire Layer for All Layers, a highlighted "object" occurs about 1000 km away from the location I digitised. Zooming in on this selected object reveals nothing ...merely a small black square and its circular rotation handle. I'm sure I was able to do this in previous versions of MapInfo. Regards, Bill --------------------------------------------------------------------- List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Message number: 17883 --------------------------------------------------------------------- List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Message number: 17886
