Which is more difficult, 2.5-dimensional measurement or 3-dimensional measurement?

2.5 Size measurement is difficult. 2.5 Dimensional measurement is more difficult than 3D measurement for the following reasons:

1. When measuring the end face and steps of a cylinder, the two-dimensional measuring instrument needs to focus manually, while the three-dimensional measuring instrument directly generates the coordinate system on the software without manual adjustment.

2. For the second element, the coordinates of the measuring point are manually input, while the third element is directly measured in the software.

3. In the second dimension, the measured values of multiple angles need to be spliced to get the relative coordinate values, and in the third dimension, the three-dimensional coordinate values can be obtained directly.

4. The difficulty of operation also makes the secondary measurement require higher skills of operators.