Dioptra- a camera position and angle measurement tool for navigation, surveying, positioning, and measurement.
Celebrating 30,000 users in 2016!
Instructions: Press the on-screen camera button to save an image. View saved images in your device's gallery app.
Dioptra provides the following information like a theodolite optical instrument -
yaw indicator (compass)
pitch indicator (tilt degrees)
roll indicator (tilt degrees)
along with -
azimuth and bearing to photo subject
The ancient greek "dioptra" was a classical astronomical and surveying instrument, dating from the 3rd century BCE. The dioptra was a sighting tube or, alternatively, a rod with a sight at both ends, attached to a stand. If fitted with protractors, it could be used to measure angles.