<Table> <Tr> <Td> </Td> <Td> This following paragraph may contain indiscriminate, excessive, or irrelevant examples . Please improve the article by adding more descriptive text and removing less pertinent examples . See Wikipedia's guide to writing better articles for further suggestions . (October 2018) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This following paragraph may contain indiscriminate, excessive, or irrelevant examples . Please improve the article by adding more descriptive text and removing less pertinent examples . See Wikipedia's guide to writing better articles for further suggestions . (October 2018) </Td> </Tr> <P> Since the spacing of streets in grid plans varies so widely among cities, or even within cities, it is difficult to generalize about the size of a city block . However, as reference points for US cities, the standard square blocks of Portland, Houston, and Sacramento are 264 by 264 feet (80 m × 80 m), 330 by 330 feet (100 m × 100 m), and 410 by 410 feet (120 m × 120 m) respectively (to the street center line). Oblong blocks range considerably in width and length . The standard block in Manhattan is about 264 by 900 feet (80 m × 274 m); and in some U.S. cities standard blocks are as wide as 660 feet (200 m). The blocks in Calgary, Canada, are 330 by 560 feet (100 m × 170 m), while those in Edmonton, Canada are 197 by 560 feet (60 m × 171 m). The blocks in central Melbourne, Australia, are 330 by 660 feet (100 m × 200 m), formed by splitting the square blocks in an original grid with a narrow street down the middle . In Chicago, Illinois and Minneapolis, Minnesota, a typical city block is 660 by 330 feet (200 m × 100 m) (w × h), meaning that 16 east - west blocks or 8 north - south blocks measure one mile . </P> <P> Many world cities have grown by accretion over time rather than being planned from the outset . For this reason, a regular pattern of even, square or rectangular city blocks is not so common among European cities, for example . An exception is represented by those cities that were founded as Roman military settlements, and that often preserve the original grid layout around two main orthogonal axes . One notable example is Turin, Italy . Following the example of Philadelphia, New York City adopted the Commissioners' Plan of 1811 for a more extensive grid plan . By the middle of the 20th century, the adoption of the uniform, rectilinear block subsided almost completely, and different layouts prevailed, with random sized and either curvilinear or non-orthogonal blocks and corresponding street patterns . </P>

How far is a city block in miles
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