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USNG US NATIONAL GRID
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USNG United States National Grid Lessons learned have taught us that standardized grids are needed for positional reporting. As far back as Hurricane Andrew, problems were recognized for emergency managers...
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USNG What’s wrong with current systems? We already have… – Latitude/Longitude – Township/Range/Section – Street Address and Zip – UTM
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USNG Latitude/Longitude Multiple formats are confusing DD -85.990151, 30.272240 DM -85 59.409089, 30.16.334386 DMS 85 59’24.545”W, 3020.063”N All the same location!!!
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USNG How far is a second anyway? What is the distance from…. 85 59’24.545”W, 30 16’20.063”N To here…. 85 59’26.292”W, 30 16’14.546”N
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USNG Worse yet… What is the distance from -85.990443, 30.275358 To here…. 85 59.364547, 30 16.504539
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USNG Township/Range/Section Township/Range/Section grid from the Public Lands Survey System is an important and good system… – basis of land ownership records – been in use for over 180 years
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USNG Township/Range/Section But a perfect section really doesn’t exist –irregular in coastal areas – too large to meet needs of ground crews
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USNG Street Address and Zip Problematic due to… – rural routes – post office boxes
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USNG What do you do when the SIGNS are gone?
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USNG What do you do when the ROADS are gone?
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USNG
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RIGHT UP
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USNG RIGHT UP 0
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USNG 0
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0 RIGHT UP
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USNG 0 10 UNITS 100 UNITS
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USNG 0 RIGHT UP
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USNG Review Grid Zone 17R 100,000m 17R NJ 4 digit = 1,000m 17R NJ 72 65 6 digit = 100m 17R NJ 726 657 8 digit = 10m 17R NJ 7262 6578 RIGHT (Easting) - UP (Northing)
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USNG Practical Exercise
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USNG ppt Building at grid: 145 100 Ex 1 Read right, and up.
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USNG ppt Building at grid: 1282 1122 Ex 1
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USNG ppt Building at grid: 1210 1109 Ex 2 Read right, and up.
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USNG ppt Road Intersection at grid: 1318 0978 Ex 3 Read right, and up.
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USNG ppt Building at grid: 1448 0992 Ex 4 Read right, and up.
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USNG ppt Building at grid: 1215 0924 Ex 5
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Practical Exercise (Camp Blanding Map) 30 Locate the 8 digit coordinate for the 7 points on your map
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USNG 1.17R MP 05361516 2.17R MP 04521665 3.17R MP 04731701 4.17R MP 05211585 5.17R MP 05401551 6.17R MP 06321356 7.17R MP 04821445
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USNG
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