T-Square

A T-Square is a drafting tool used in the field of drafting, surveying, and mapping. It is a straightedge with a perpendicular crosspiece called the head, forming the shape of a "T". The T-Square is used to draw straight lines and right angles on a drafting board or paper.

In drafting, the T-Square is placed along the edge of the drafting board or paper, and the head is used as a guide to draw horizontal lines. The vertical edge of the T-Square is used to draw vertical lines or to align other drafting tools.

In surveying and mapping, the T-Square is used to draw straight lines and right angles on field maps or surveying documents. It helps in accurately representing the features of the land or the measurements taken during a survey.

Overall, the T-Square is an essential tool for precise and accurate drafting, surveying, and mapping work.