create an "inf" file

[Guest]

Hello to alli have a short problemto create a .inf file for Mesh using i like to have something like a calculator:i use grises50 to convert raw's to dem's. actualy it seems only working with good results using LOD9... anyway i like the results. the problem is to find out the edges of a LOD9 -tile.How can i find out this values (upper-left corners and dimensions)?specially as i am designing areas at south-west hemispheric area (both values are in minus (-)example i have a position of -12

[Guest sgreenwood]

Hi Francis,I have some info about LOD calculations here:www.fs-traveler.com/gtopo-calc.htmlMy Resources page has a link to a simple excel spreadsheet you can download and experiment with as well. It needs a bit more testing but is quite useful as a learning tool as is. I think it works ok in your area :). Here is the data for your NW corner.http://ftp.avsim.com/dcforum/User_files/3e724cd639f80900.jpg Hope these are helpful.Steve

[rhumbaflappy 113]

Hi Francis.Try LODCalc, by Richard MarklewDick

[Guest sgreenwood]

Hi Dick,A good calculator is useful if all you need is a number, but you can't learn or do much more with it.If you can use a spreadsheet, you can see how the calculations are done (and fix them if necessary). Once the process is understood, it can easily be extended to meet your own needs. For example, the version I use has a page that provides me with the coordinates I need to specify when requesting data from the USGS NED site. The image in my above post has disappeared so I'm including it again, as well as an image of a similar calculation using LODCalc, which seems to have a problem. (In case the images are not available - while coordinates were entered as being in the S/W hemisphere, the output is in the N/E hemisphere, so the the calculations are incorrect and the user can't fix it.)Steve

[rhumbaflappy 113]

Hi Steve.Reclicking the N and W sliders will reset the bounds, then click calculate... it does sometimes "stick".Dick