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Friday Webinar - June 7, 2019 - The NYC Grid: Retracing Surveyor John Randel Jr's Footsteps
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Friday Webinar Series Join us on a Friday of every month as we present lectures on a variety of business, project management and surveying subjects. All from the convenience of your office! You can participate by conference call, by computer-based webinar, or both! And some courses have been approved for NY CE credit!

When: June 7, 2019
From 8:30am until 9:30am EST
Where: Online Webinar
United States
Presenter: J.R. Lemuel Morrison, PLS
Contact: NYSAPLS Office

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Register Now for the next Webinar
in the First Friday Lecture Series
Friday, June 7, 2019 at 8:30am
Featuring: J.R. Lemuel Morrison, PLS

The NYC Grid: Retracing Surveyor John Randel Jr's Footsteps

1.0 NY LS/PE CE Hour

200 years ago the Commissioners of 1811 (Gouverneur Morris, John Rutherfurd and Simeon De Witt) devised a plan for the development of the City of New York from its colonial center up through the open Manhattan Island. Their plan, a grid of streets and avenues, imposed a rational structure across farmland, forests and marshlands. John Randel, Jr, the commissioners' chief engineer and surveyor, surveyed rural Manhattan and placed a marker at the intersection of every street and avenue, from the Hudson River to the East River, from 1st Street to 155th Street.


The grid is plain to see today, but street grading and two centuries of dense development most likely destroyed all of Randel's markers. Finding actual markers as placed by the original surveyor is not only the gold standard for surveyors, but also a valuable sliver of our history. Are there any left? We will discuss the collaborative effort to recover and verify Randel's markers in an area where the grid was laid out but not constructed - Central Park.


Seminar Goals and Objectives

  1. Explain the history of the Manhattan Grid
  2. Identify the sources of historical records used
  3. Describe the methods used to recover boundary markers

About our Speaker

Lem Morrison, LS is the Regional Survey Director, Northeast at VHB. He is a licensed land surveying in NY and 8 other states. He he holds a BS in Land Surveying from the Ohio State University and an MBA from the Zicklin School of Business at Baruch College. Lem is also an adjunct assistant professor at the NYC College of Technology (CUNY) in the Department of Construction Management and Civil Engineering. He teaches land surveying and 3D scanning. He currently resides in Manhattan with his wife and daughter.


Registration Fees: $49 members, $60 non-members 

Two-step registration process:

1. Register on NYSAPLS website.

2. Follow the link provided on your confirmation to complete the second registration step. You will be directed to the website to enter your name and email to complete your registration. THIS STEP IS MANDATORY TO COMPLETE YOUR REGISTRATION - DO NOT SKIP IT

After both steps are completed, registrants will receive an email confirmation that includes a unique web-link for the webinar. This web-link cannot be shared as it is unique to the individual registrant.

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Land Surveyors Building
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