Uploaded 25-Jun-12
Taken 13-Jun-12
Visitors 190


17 of 183 photos
Photo Info

Dimensions2256 x 1496
Original file size2.11 MB
Image typeJPEG
Color spacesRGB
Date taken13-Jun-12 11:55
Date modified13-Jun-12 11:55
Shooting Conditions

Camera makeNIKON CORPORATION
Camera modelNIKON D40
Focal length18 mm
Focal length (35mm)27 mm
Max lens aperturef/3.5
Exposure1/8 at f/3.5
FlashNot fired, compulsory mode
Exposure bias0 EV
Exposure modeAuto
Exposure prog.Unknown
ISO speedISO 800
Metering modePattern
Digital zoom1x
Marking the upper level.

Marking the upper level.

The floor is not a good candidate for a height reference point as it's absolute height varies from the lowest point (and floor drain) behind and to the left of the laser to the highest point at the back right corner of the room this shot looks into. This difference is not accidental - it allows for drainage of the floor.

To get consistent elevations for the railroad, there is one reference mark on the end of the concrete dividing wall to the left that serves as the "home" data point. All other elevations are measured from that point.