Trimble Business Center

Hi!

I want to have the total surface in m2 of this model how do i do? 

I have made an projected surface wich i cant do a report from. The way around this is to do a CF map from a non existing surface and then i will get a new surface with the m2 and volume. If i compute the surfaces both ways i will get the same m2. Is this the actual m2 for the surface? 

The area in your second picture where it shows Area of Fill is the planimetric area of the triangles in the projection plane, same as a normal Cut Fill Map shows Planimetric area of Cut or Fill in the horizontal Plane (the normal projection plane).

Alan 

If you use the Radial Surface option and then add the Radial Surface to a corridor when you run the Corridpr Earthwork Report you will get a surface area computed using end section methods - if you use a tight interval on the report then you will get a reasonable estimate of Surface Area - but it is not as accurate as determining the surface area of the triangles of the projected surface.

I just ran a test with 1 ft (30cm), 2 ft and 5ft intervals and it gave me surface areas of 10250, 10263 and 10260 Ft2 for the surface area of a rock face similar to yours - so I would be fairly happy with those numbers for surface area if my surface was clean and accurately defined.

Alan

To create a Radial Surface - create the point cloud region, create a HAL along the face (a straight line is what you need for this example. Make the HAL longer than the face. Use the Create Radial Surface command. The radial surface created change the properties to be Unwrap from Top.

You will need an Original Ground in the Corridor - if you don't have one create a simple plane at an elevation above the lip of the cut face and use that as the OG - the Corridor Earthwork report wont report unless you have that.

Run the Corridor Earthwork Report, report at eg 25cm intervals and look in the Areas section of the report (columns of the report) for the Surface Area of Finished Grade - that is the face area of the Radial Surface.

Alan

Thanks Alan! 

I did not know this way to do it. When i tried it i saw that when my surface "came back" over it self again it did not work but i could make 2 corridors with 2 separate surfaces instead. 

I dont know how big the actual "wrong" is when using the squaremeters from the cut-fill map instead but i did use that one in this case. The accuracy was not so important and i did some aproximations and got the same numbers, ish. 

/F