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ISOMETRIC, NON-ISOMETRIC, VS - Coggle Diagram
ISOMETRIC
There are 6 possible projections
FRONT
TOP
RIGHT
BOTTOM
LEFT
BACK
3 of the views can give a complete representation
Types of line in Orthographic
VISIBLE LINES: Represent VISIBLE parts of an object
Drawn as Continuous lines
HIDDEN LINES: Represent features that are noy visible. (internal / Hidden)
Drawn as Short-Dashed Lines
CENTER LINES: Represent centers of holes, cylinders & other symetrical features
Drawn as Alternating Long & Short Dashes
Equal measurement and dimensions
Drawn in three axes at 120 degrees apart
Vertical Edges are kept vertical
While the other two axes are 120 degrees
DIFFERENCE BETWEEN 1ST & 3RD ANGLE
1ST ANGLE
The orthographic projections are on the OPPOSITE side
Commonly used in EUROPEAN countries
3RD ANGLE
The orthographic projections are on the SAME side
Commonly used in UNITED states
NON-ISOMETRIC
Not maintaining equal measurement and dimensions
VS