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Old 01-05-2015, 12:21 AM
Location: Portland, Oregon
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Portland, Or is basically formed on two grids. Downtown is on the nautical north and the rest of the city is on the polar north alignments....or it is the other way around, I can never remember.
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Old 01-05-2015, 08:42 AM
Location: West Michigan
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I think what op means is something like this: https://www.google.com/maps/@43.2302...2470923,15.21z
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Old 01-05-2015, 09:37 AM
Location: Pittsburgh, PA (Morningside)
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Pittsburgh's Downtown has two different grids, which meet at Liberty Avenue. The story I have heard is that the southern grid (which runs parallel to the Monongahela River) was intended to be the grid for the entirety of Downtown. However, a shantytown arose along the Allegheny River, which had a different grid of streets which ran parallel to that river. After some initial attempts to clear the shanties and draw the streets as originally intended, the early city founders threw up their hands and agreed to what became the current street pattern.
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Old 01-05-2015, 10:10 AM
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Denver is a good example of this. The original street grid was parallel to the Platte River and is the present day CBD. The rest of the city developed on a compass grid.
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Old 01-05-2015, 12:10 PM
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As others have mentioned, old cities were often water-oriented irregular grids were often used as these better served the commercial activities at rivers or ports. Also, these cities often pre-date more centralized planning, so things were added and developed in a less uniform manner.

The notion that all cities are like this is false, however. Look at Indianapolis. It was designed by an apprentice to l'enfant (DC). The original city is one mile square with perimeter streets called east, south, west, and north. The streets are aligned at cardinal directions. The central north-south street is on a meridian and is even called Meridian St. There are 4 streets that radiate diagonally at perfect 45 degree angles from the center, but every other street is on a cardinal direction. The city itself is almost 200 years old, so it isn't that new either.
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