p45cal,
Point well taken. I have attached an additional workbook ("wytheville finished") showing the desired end product. Aussiebear is correct that these are gps points. The sheet I am working on is a small sample of what are sometimes 100k plus points. As you can see from the finished sheet, the next step is to calculate the slope % from one first point to last point to allow for corrections to Range "D". Range "D" is the actual ground elevation. I can then calculate what the actual elevation should be in Range "E". Lastly, Range "F" lets me see the slope between two sets of points looking East to West. Any further assistance would be greatly appreciated.![]()