How do you measure z distance between two features. for instance two points at different x & y locations?
distance between Z depths
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X

change your workplane to, say Y minus, for example
then report in 2D in Z
then change back to Z plus workplane
bobWhich one gets ridden today? MPH vs MPG..tough choice, both are FUN
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Starrett RGDC 402824 :alien:
Demon vintages 3.7, 4.1, 4.2, 4.3, 2009 
problem with that is if he wants to use just one surface point on each plane, it will give the 3D distance between them....the shortest distance from point to point...not relative only to the Z axis, but to ALL 3 axisWhich one gets ridden today? MPH vs MPG..tough choice, both are FUN
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Starrett RGDC 402824 :alien:
Demon vintages 3.7, 4.1, 4.2, 4.3, 2009Comment

BWilliams, That is incorrect. If you use 3D distance you will get a straight line distance from point to point, (or feature to feature, also known as "as a crow flies"). Bob Mappes gave the correct method to obtain only the deviation in the Z axis between two points, (or features), that have different X and Y locations.
Work plans are very important when using 2D distance. Once you are in the correct workplane selecting 2D distance or angle gives the results similar to what some other softwares call "projection", or "projection to a plane". HTHsigpic"Hated by Many, Loved by Few" _ A.B.  Stone brewery
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thanks for watcin' my back WesWhich one gets ridden today? MPH vs MPG..tough choice, both are FUN
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Starrett RGDC 402824 :alien:
Demon vintages 3.7, 4.1, 4.2, 4.3, 2009Comment

sigpic"Hated by Many, Loved by Few" _ A.B.  Stone brewery
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Which one gets ridden today? MPH vs MPG..tough choice, both are FUN
sigpic
Starrett RGDC 402824 :alien:
Demon vintages 3.7, 4.1, 4.2, 4.3, 2009Comment
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