Hi all This is an interesting little problem that some of you might want to consider.
I have a MI table of 10m squares, each with attribute Ht. You can think of the table as representing an elevation grid covering a region. The region needs to be broken up into a set of sub-regions where 70% of the points that fall in each sub-region are less than or equal to the lowest point of that sub-region + .5 m. In simple terms think of digging a pond and leaving a small island in the middle for ducks; 70% of the region defined by the outer perimeter of the pond is water, 30% land. For the 100% solution Start Find the highest point. Set as original point Find all the points that are wthin .5m of the original point Combine 10m squares into an object and then disaggregate Discard all the new regions that do not contain the original point Set the ht points that fall into the new sub region to -999 Loop until all hts are -999 Now do it for 70% case. The table is big. Any suggestions welcome Tony The average family throws out six trees of paper a year - please respect the environment and be green by example, only print out this E-Mail and attachments if you have to. Thank you. This E-mail and any files transmitted with it are private and intended solely for the use of the individual or entity to whom they are addressed. If you are not the intended recipient, the E-mail and any files have been transmitted to you in error and any copying, distribution or other use of the information contained in them is strictly prohibited. Nothing in this E-mail message amounts to a contractual or other legal commitment on the part of English Nature unless confirmed by a signed communication. English Nature will make every effort to keep its network free of viruses. However, the recipient of this message will need to scan this message, and any attachments, for viruses, as English Nature can take no responsibility for any computer virus that might be transferred by this e-mail. --------------------------------------------------------------------- List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Message number: 11758
