Hello, FLattening a line...
a mapbasic app will be needed for this UNLESS your line is actually just a series of just xyz points in which case you can adapt the method given below for flattening a grid.. Flattening a grid... well you could write a crossection tool to do this (and i'll take a look at my own to see how easy it would be to do) BUT for an instant answer adapt the following formulae into VM's grid calculator and then use the crosssection tool to view the new corrected surfaces NewSurf B = -1 * (GridA - GridB) NewSurf C = -1 * (Grid A- Grid C) Basically you are performing grid subtracts for surfaces B and C (ie making teh isopachytes), but in order to view them properly in VM as geologically flattened layers you need to invert them (hence the -1 multiplier)....the only problem with this quick method is that you have to make a fake grid of 0 elevation to represent the flattened A surface in your cross section... You can do the same with a table of XYZ points, just add columns and calculate the fields in teh same manner. I have a load of borehole and grid visualisation stuff that i use for this kind of thing but its a bit 'unfriendly' if you are interested i'll see if i can fix it up.. regards R Brit. Geol. Surv. www.bgs.ac.uk -----Original Message----- From: Wilfred [mailto:[EMAIL PROTECTED] Sent: 16 July 2004 09:16 To: MapInfo List Cc: Iman Arga Koesoemah; Harmen Rashid Subject: MI-L Flattening Layers Grid Hello Lister, Im back. I am looking for options available in the Vertical Mapper MapInfo program to flaten a line and a 2-D grid surface. Here are the problems. Assume I have 3 grid files of 3 different earth surfaces. It means that each layer has its own grid file. When I make a cross-section across the region through these 3 stacked different surfaces, I will see stacked lines of cross-section (total: 3 irregular shape of lines) of these 3 layers. These 3 irregular lines are represented by red, blue, and green. Please note that layer-A (red) is the upper layer, layer-B (blue) is the middle layer, and layer-C (green) is the lower layer. Problem I: Flatening a line If I flaten the surface of layer-A by flatening the irregular red line, I should see the shape of the blue and green irregular lines changed. The original shapes of the blue and green lines will be adjusted because the red line is flatened at a particular Z (vertical) value. The original blue and green line shapes are changed because the Z (vertical) values of the blue and green lines are modified to maintain the same thickness between red and blue; and the same thickness between blue and green. Is that possible to see these results in this program ?? Problem II: Flatening a grid of surface. Now the same question above is used for flatening a grid instead of a line. If I flaten the surface of layer-A, I will see the surfaces of layer-B and layer-C different from the original shapes (before flatening) of layers B and C. Is that possible to see these results in this program ?? Is there a program in the Vertical Mapper MapInfo to perform the problems I and II described above ? If yes, I need a rough procedure to follow. Wilfred --------------------------------------------------------------------- List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Message number: 12641 ********************************************************************* This e-mail message, and any files transmitted with it, are confidential and intended solely for the use of the addressee. If this message was not addressed to you, you have received it in error and any copying, distribution or other use of any part of it is strictly prohibited. Any views or opinions presented are solely those of the sender and do not necessarily represent those of the British Geological Survey. The security of e-mail communication cannot be guaranteed and the BGS accepts no liability for claims arising as a result of the use of this medium to transmit messages from or to the BGS. . http://www.bgs.ac.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: 12643
