Landscape Navigating the site:
Colorado River Valley at the California and Arizona state boundaries.
The river moves along the upper right across the top of the picture down to the left.
1787, The Articles of Confederation Congress passed a Land Ordinance based on a rational means of surveying land in the western territories to facilitate the disposal of the public domain.
This system became common through all states west of the Appalachian mountains and is called the "township and range" system. Because of the checker board pattern the appearance of this system on the land is called a grid.
| ee1e1` | US high plains
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Southern Britain
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| eland pattern | 
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| Chesapeake Bay | Eastern Europe | |
Compare with J.B. Jackson's Sense
