A New series of Books and Apps for the Surveying, Engineering, GIS Professionals and aspiring Students.



New lower price for “Highway Centerlines (Retracement) - Book 14”


Printed version now available for $49.

Amazon 5 Star Rating!

The Myth about Spiral Curve Offsets- Book 7


Gregory…  -

Great book…..Bought the whole set!


Crume’s Transformation

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