Grid vs. tin
Posted: Thu Mar 14, 2013 5:33 pmIn regards to tins and grids, is there an advantage of creating one over the other?
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Grid vs. tin
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Posted: Thu Mar 14, 2013 5:33 pmRe: Grid vs. tin
Posted: Thu Mar 14, 2013 6:31 pmIMHO tin's give better accuracy and produce a truer surface.
Re: Grid vs. tin
Posted: Thu Mar 14, 2013 11:24 pmI would tend to agree with Dent, but it may depend on how your field data was collected. If it was collected close to or in a grid pattern then the Grid method would be suitable. However, a tin would still be fine in that situation. If the data was collected from a mix of grid and strings then I believe the Tin would be a better result.
Re: Grid vs. tin
Posted: Fri Mar 15, 2013 12:41 pmHere's the deal, a grid ignores any irregularities inbetween grid points. Our SOP is to basically shoot a grid based on the scale of the final plat PLUS any and all "breaks". Shooting purely a grid can totally miss a drainage ditch or other major break features. Same result when you base your surface on a grid.
Grids are only good in FLAT (read that as "paved") areas and can give only a rough solution to the surface that should only be used for estimates. In 44 years of compiling contours, I have NEVER done so with a grid only.Grids are for Engineering rough estimates. Tins are for cartographers. And Trix are for kids!!
Grids are only good in FLAT (read that as "paved") areas and can give only a rough solution to the surface that should only be used for estimates. In 44 years of compiling contours, I have NEVER done so with a grid only.Grids are for Engineering rough estimates. Tins are for cartographers. And Trix are for kids!!