9/10/03 1
Lab1-1
ORIENTATIONS OF LINES AND PLANES IN SPACE
IMain Topics
ADefinitions of points, lines, and planes
BGeologic methods for describing lines and planes
CAttitude symbols for geologic maps
DReference Frames
II Definitions of points, lines, and planes
APoint
1Defined by one set of coordinates (an ordered triple in 3-D)
2Defined by distance and direction from a reference point
3Intersection of two lines
4Intersection of three planes
BLine
1Defined by two sets of coordinates
2Defined by two points
3Defined by distance from a reference point and the direction of
the line
Reference point
Direction
4Intersection of two planes
CPlane
1Defined by three sets of coordinates
2Defined by three points
3Defined by distance and direction from a reference point
Reference point
Direction of
line normal to
plane
Plane
(edge view)
d
4Defined by two intersecting or two parallel lines
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