Horizons in output csv can be outside [0,90]

[nicholas512]

output horizon values are greater than 90 or less than 0

[nicholas512]

is this really a problem? what about overhangs? what about up on a ledge ?

[nicholas512]

more importantly, how does it know when to use which azimuth?

[stgruber]

The sky circle should look like a wheel with spokes having, e.g. a 10 degree spacing. The 'Wheel' will help to calibrate tot he image and its proper alignment will be visible. DUring digitization, one value is required in each between-spoke interval. Assuming 0 is flat and 90 is vertical, then everything less than 0 equals 0. Every interval without digitised point will be treated at 90 degrees. Overhangs are ignored, as we can have only one horizon. The field azimuth needs to be entered manualy and a corresponsing point needs to be selected in the image. I think Mark had not done that yet.