Topic: Snap Angle - USGS quad drawings

[wjbzone]

I work with  USGS (US Geological Survey) topographic quadrangle drawings.

I believe the snap angle on these drawings is set to the angle between magnetic north and true north. (not sure)

I always set the snap angle to zero when I work with these.

If you work with these, do you know any advantage of leaving the snap angle set a non zero value?

[mjfarrell]

NO there is no advantage to be gained...given that you don't really know how or why the snap angle is set in the manner it is.

[mjfarrell]

Further, IF your drawing is setup on the desired Coordinate system, attaching these files through Map, Map will automatically align them to the coordinate system of your working file(s).

[wjbzone]

Thanks for the reply. I'll just continue to ignore the snap angle and work in the state plane coordinate system. When I copy and paste to base coordinates, everything lines up the way it should.

BTW, I don't use any of the vertical products (LDT, 3Dcivil, Map ). I guess my post does fit this category better is why it was moved.

[mjfarrell]

Thanks for the reply. I'll just continue to ignore the snap angle and work in the state plane coordinate system. When I copy and paste to base coordinates, everything lines up the way it should.

BTW, I don't use any of the vertical products (LDT, 3Dcivil, Map ). I guess my post does fit this category better is why it was moved.

As a Survey/Engineering type I only ask; why not?

It would make you more profitable. 

(NOTE:  I do not work for or sell autodesk products or services.  I do provide training and support services for those that do.)