Importing TTM files is an easy process, you can  drag and drop a TTM in the same way you can a DXF. Simply navigate to Import Layer on Trimble Stratus. 

Keeping this change in mind, we wanted to clarify the differences, benefits, and limitations of three approaches in working with TTMs. 

Getting a machine model into Trimble Stratus can be done in three main ways. (1) You can import TTMs as layers, which is simple but can be complicated by large file sizes. (2) Import them as a design surface; great for larger files, but could slightly change volumetric comparison outputs. (3) Alternatively, use a DXF instead. This is a more universal format, but typically DXF TINs are heavier files. 

For more detail on each of these approaches, see below:

1. [NEW FEATURE] TTM Import as a layer

Benefit: This drag and drop feature leaves the integrity of the file completely untouched—volumes rendered should remain entirely the same. 

Drawback: Larger files (>50,000 faces) will have slower browser performance. If >150,000 faces, we limit the viewing capability completely although measurements will still calculate.

2. TTM Import as a Design Surface 

(Using this method, Trimble Stratus takes the TTM and creates a 3D elevation from the vector lines.)

Benefit: You can expect very high performance for larger files with >50,000 faces in your browser using this method.

Drawback: Altering the original specifications of the TTM could slightly change the volumetric output when doing comparisons (i.e. vector to raster).

3. DXF rather than TTM

Benefit(s): More universal format. Users who do not have access to TBC can still upload a TIN mesh and get volumes from it. Other objects such as polygons, line, and txt can be included within a DXF.

Drawback: A DXF TIN is typically a heavier file than the same surface exported as a TTM, meaning some performance could be sacrificed. 

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