Next Generation Land Surveyor Community

# Grid Corrections and Their Strange Beauty

I thought this might be very interesting to land surveyors in the community..

Before Thomas Jefferson became president he came up with the bright idea of dividing up the American west into regular rectangular parcels of land. The Public Land Survey System was devised in order to distribute land to Revolutionary War soldiers and to make it easier for the government to raise money by selling land.

The result is what is now known as the 'Jefferson Grid'. If you have ever flown over the United States then you will no doubt have seen these square mile sections in the American landscape. From the air it appears that a lot of the USA is almost perfectly divided into one mile squares.

Although it isn't quite perfect. If you've ever driven across that same landscape then you might have also experienced Jefferson Grid corrections. In order to correct for the curvature of the Earth the regular Jefferson Grid system has to make occasional deviations. These deviations help get around the problem of placing a two dimensional rectilinear grid onto the surface of a three dimensional sphere.

Photographer Gerco de Ruitjer's has compiled a beautiful collection of aerial images showing examples of where the Jefferson Grid has strange kinks, bends or curves to correct for the curvature of the Earth. In Grid Corrections you can view examples of where the Jefferson grids are not perfectly aligned.

If these grid corrections are not to your taste then you might prefer to view areas where the grid is perfectly aligned. You can see some great examples of how Thomas Jefferson shaped the American landscape on the Jefferson Grid Instagram account. This account posts aerial imagery (taken from Google Earth) showing examples of Jefferson's gridded plots of land.

This Content Originally Published by a land surveyor to Land Surveyors United Network

Views: 253

### Replies to This Discussion

corrections to grid

Townships.kmz

This is a KMZ that will overlay the Townships to most of the USA. Something useful for a quick look and see what area your working on. Or to check what township / section the area is going to be in with Google Earth.

What is the difference between UTM grid system and PLANE grid system?

Where Thousands of Professional Land Surveyors, Students of Surveying and Educators are United through Collaborative Knowledge and Purpose.

## Tools,Apps and Quick Guides

DEDICATED TO THE MEMORY OF SKIP FARROW (1953-2015)

Help With Survey Equipment

#### Social Support For Equipment

Surveying Video Categories

Surveying Photo Categories

United States Hub Forums

 AK AL AR AZ CA CO CT DE FL GA HI IA ID IL IN KS KY LA MA MD ME MI MN MO MS MT NC ND NE NH NJ NM NV NY OH OK OR PA RI SC SD TN TX UT VA VT WA WI WV WY

International Surveyor Hub Forums

Resources for Company Owners

Land Surveyor Social Media

Surveyor Resources Collections

### Leica iCON robot 50 Robotic Total Station iCR55 w/ Leica CC80 tablet controller

 \$16,499.00End Date: Sunday Dec-9-2018 14:59:03 PSTBuy It Now for only: \$16,499.00Buy It Now | Add to watch list

### Trimble S8 DR PLUS 2" Robotic Total Station w/ Prism & Charger, Case 2.4Ghz

 \$18,499.00End Date: Sunday Dec-9-2018 14:46:19 PSTBuy It Now for only: \$18,499.00Buy It Now | Add to watch list

### Spectra TS415 Total Station Transit with Case Battery Charger & Data Cable

 \$1,699.99End Date: Saturday Dec-8-2018 9:41:42 PSTBuy It Now for only: \$1,699.99Buy It Now | Add to watch list

### LEICA TC407 Total Station Dual DisplayTransit Level w/ Battery, Charger and Case

 \$1,931.99End Date: Thursday Nov-29-2018 6:04:08 PSTBuy It Now for only: \$1,931.99Buy It Now | Add to watch list

### Leica TCR403 Reflectorless Total Station Dual Display Transit Level

 \$2,599.99End Date: Thursday Nov-29-2018 6:01:43 PSTBuy It Now for only: \$2,599.99Buy It Now | Add to watch list