| Page data | |
|---|---|
| Authors | Ethan |
| Published | 2016 |
| License | CC BY-SA 4.0 |
| Quality |  Stub |
| Translate to | Français, Español, Kiswahili, 中文, العربية, Русский, more |
| Export to | PDF, LaTeX, EPUB, ODT |
| Page views | 136 |
| Cite as Ethan (2021). "A-frame". Appropedia. Retrieved 2021-10-22. | |
An A-frame is a tool used to determine landscape contour. It is simple and cheap to make, and appropriate to situations where other contour-mapping tools such as LiDAR or GPS are unavailable, impractical, or prohibitively expensive. It consists of three straight rods or planks, fastened together in the shape of a capital "A", with a plumb bob (weight) suspended from the apex. Markings on the cross-piece are compared to the plumb bob line to determine slope.