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So its grid distance is somewhat less than 1,000 feet: However, grid distances in your spatial data are always measured relative to the coordinate system's ellipsoid (to simplify matters, sea level).įor example, a 1,000-foot line surveyed at a high elevation must be scaled down to fit the earth's ellipsoid at sea level.
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Why correct distances?Ī surveyor measures distances on the ground relative to the local ground elevation. The direction offset is an angle that is added to ground directions to rotate them to grid directions or that is subtracted from grid directions to rotate them into ground directions. Ground and grid directions must be rotated to convert one into the other. However, directions in your spatial data are always relative to the coordinate system's grid north. Why correct directions?Ī surveyor may measure angles on the ground relative to any of several definitions of north: true north, magnetic north, grid north, or a locally defined north.
#Gridded plan software
You may set constants (the ground to grid correction) for directions and distances so that the software can correctly convert between the ground and grid measurements. Ground and grid measurements are often different. However, the directions and distances in your GIS data are based on the spatial data's coordinate system, or the grid measurements. These are referred to as ground measurements. When you read the COGO descriptions for boundaries on a survey plan or other legal document, the directions and distances are measured on the surface of the earth. Using the Ground to Grid Correction dialog box.įor more details, please see our privacy notice. You can unsubscribe at any time by clicking on the unsubscribe link at the bottom of every email, or by emailing us at. We will never give your details to anyone else without your consent. We will only use your email address to send you the newsletters you have requested. News from Dezeen Events Guide, a listings guide covering the leading design-related events taking place around the world. News about our Dezeen Awards programme, including entry deadlines and announcements. Dezeen Jobsĭaily updates on the latest design and architecture vacancies advertised on Dezeen Jobs. Dezeen DailyĪ daily newsletter containing the latest stories from Dezeen.
#Gridded plan plus
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Our most popular newsletter, formerly known as Dezeen Weekly. Vietnamese architecture studio Kientruc O has given a modernist makeover to an old house in a narrow Ho Chi Minh City alleyway, transforming it into a restaurant with a lush garden wrapped by gridded glazing.
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