Hello ! I am using version 5.5 and still having different problems with Proportion Sum in Add Column statement. First One : Wrong results... Loosing peoples! I have two regions in my first table. In my second table, the limits between the 2 regions were changed so the second one now contains a part of the first one. I would like to get a Proportion Sum of the initial population. I am doing : Add Column "S99" (PropSumOfPop_96 Float)From S96 Set To proportion sum(Pop_96) Where intersects Dynamic The result is that the population of the first region (reduced area) is OK, but the second one only contains the population for the added part...! Second One : Generating babies... Overlap function also wrong ? I am using an exact copy of a table with Add Column Proportion Sum and again have some wrong results. After the operation, I obtain more population than I had initially! When trying the Overlap function on the problematic region and the surrounding, I can see that this function don't seem to work properly as well. It gives me an object that is only part of one region! Third One : Strange behavior... I have two tables with the same region. The region in the first table has 251 segments in 3 polygons. The region in the second one has one more node, but area is the same. When using Add Column with Proportion Sum, I would expect my variable to get the same value, but it is not what happens. It reduces from 62340 to 7140 ! Add Column "H99" (PropSumOfPop_96 Float)From H96 Set To proportion sum(Pop_96) Where intersects Dynamic Since the column is dynamic, I can do the following : When removing the node from the second region, I can see the population variable coming back to the good value!!! This command would be great if it worked 100% of the times! Is there some hope ? Thanks. Pierre Blanc Minist�re des Transports du Qu�bec [EMAIL PROTECTED] ---------------------------------------------------------------------- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]
