# Calculate volume in Gallons results are questionable

geomeskin
Global Mapper UserPosts:

**6**
I just used the "Calculate Cut/Fill Volume" tool to calculate the volume of a water pit. The pit was designed to hold 1,000,000 gallons.

I'm calculating the volume using a LiDAR data set and the contours generated from that data set.

In the resulting table:

I've checked the projection of the data and the units. Everything is where it should be.

Using the acreage values I get the correct number of cubic feet and then gallons. But those calculated values don't at all match the gallons calculated by GM.

My question is why the GALLONS/Barrels calculations provided by GM are so off when everything else seems to be right?

thanks,

alex

I'm calculating the volume using a LiDAR data set and the contours generated from that data set.

In the resulting table:

- I get acreage values that are spot on.
- elevation contours that are spot on.

I've checked the projection of the data and the units. Everything is where it should be.

Using the acreage values I get the correct number of cubic feet and then gallons. But those calculated values don't at all match the gallons calculated by GM.

My question is why the GALLONS/Barrels calculations provided by GM are so off when everything else seems to be right?

thanks,

alex