Camera Tracking and Coordinates

Dear all,

I'm just starting out with Syntheyes and Camera Tracking.
My need is to obtain 3D coordinates from a sequence shot with a single camera (more or less fixed) - we are on the Moon: Apollo 16.

Among the software tutorials there is one that refers to a similar sequence (similar to the one we are studying): I've simply opened the file containing the sequence solved by the software producer (.sni).

I have difficulty in order to interpret correctly the X, Y, Z coordinates that are proposed for each Tracker (the system is Z-up, that means the third coordinate refers to the height).

I attach some screeshots.

image1: is the tracker taken as coordinate system origin (it coincides with object 1), then X = 0, Y = 0, Z = 0 (the point is on the lunar vehicle base)
Image1.jpg.f1e6e796bcc76f942772084527e2685a.jpg


image2
: a second point on the lunar vehicle base. It should have more or less Z = 0, while the resulting value is -4.028
Image2.jpg.29430edb259b645eb5c2aaa4281b08d1.jpg


image3: this point is at the same height of the wheel, the value of Z is surprisingly -4.535
Image3.jpg.ddedcb40d3290c16a69c9c214ea9776e.jpg


image4: high end of one of the vehicle's antennas, Z is inexplicably -3.832
Image4.jpg.a1b6f8e0ce6c31e3615ce1f005ed08eb.jpg


Can anyone explain to me these strangeness?
What do I disregard to understand the spatiality of these images?
 
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