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What is the minimum grid spacing that should be used when computing contours?

April 26, 2017computing contours Grid minimum spacing Used

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What is the minimum grid spacing that should be used when computing contours?

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Do not use the default of 61 m (200 ft), which is too large. Use very small grid spacing, such as 1.52 meters (5 ft.), for runs with rapid sound level changes (near barriers, for example). Larger spacing, such as 15.24 meters (50 ft.), can give incorrect results near barriers.