US NATIONAL GRID USNG United States National Grid

United States National Grid • Lessons learned have taught us that standardized grids are

What’s wrong with current systems? • We already have… – – Latitude/Longitude Township/Range/Section Street

Latitude/Longitude • Multiple formats are confusing DD DM DMS -85. 990151, 30. 272240 -85

How far is a second anyway? • What is the distance from…. 85 59’

Worse yet… • What is the distance from -85. 990443, 30. 275358 • To

Township/Range/Section • Township/Range/Section grid from the Public Lands Survey System is an important and

Township/Range/Section • But a perfect section really doesn’t exist – irregular in coastal areas

Street Address and Zip • Problematic due to… – rural routes – post office

• What do you do when the SIGNS are gone? USNG

• What do you do when the ROADS are gone? USNG

Review • • • Grid Zone 100, 000 m 4 digit = 1, 000

Building at grid: 145 100 Read right, and up. Ex 1 ppt USNG

Building at grid: 1282 1122 Ex 1 ppt USNG

Building at grid: 1210 1109 Read right, and up. Ex 2 ppt USNG

Road Intersection at grid: 1318 0978 Read right, and up. Ex 3 ppt USNG

Building at grid: 1448 0992 Read right, and up. Ex 4 ppt USNG

Building at grid: 1215 0924 Ex 5 ppt USNG

Practical Exercise (Camp Blanding Map) • Locate the 8 digit coordinate for the 7

1. 2. 3. 4. 5. 6. 7. 17 R MP 05361516 17 R MP

Slides: 32

Download presentation

US NATIONAL GRID 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. . . USNG

What’s wrong with current systems? • We already have… – – Latitude/Longitude Township/Range/Section Street Address and Zip UTM USNG

Latitude/Longitude • Multiple formats are confusing DD DM DMS -85. 990151, 30. 272240 -85 59. 409089, 30. 16. 334386 85 59’ 24. 545”W, 3020. 063”N All the same location!!! 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 USNG

Worse yet… • What is the distance from -85. 990443, 30. 275358 • To here…. 85 59. 364547, 30 16. 504539 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 USNG

Township/Range/Section • But a perfect section really doesn’t exist – irregular in coastal areas – too large to meet needs of ground crews USNG

Street Address and Zip • Problematic due to… – rural routes – post office boxes USNG

• What do you do when the SIGNS are gone? USNG

• What do you do when the ROADS are gone? USNG

USNG

UP RIGHT USNG

UP 0 RIGHT USNG

0 USNG

RIGHT UP 0 USNG

100 UNITS 0 USNG 10 UNITS

RIGHT UP 0 USNG

Review • • • Grid Zone 100, 000 m 4 digit = 1, 000 m 6 digit = 100 m 8 digit = 10 m 17 R NJ 72 65 17 R NJ 726 657 17 R NJ 7262 6578 • RIGHT (Easting) - UP (Northing) USNG

Practical Exercise USNG

Building at grid: 145 100 Read right, and up. Ex 1 ppt USNG

Building at grid: 1282 1122 Ex 1 ppt USNG

Building at grid: 1210 1109 Read right, and up. Ex 2 ppt USNG

Road Intersection at grid: 1318 0978 Read right, and up. Ex 3 ppt USNG

Building at grid: 1448 0992 Read right, and up. Ex 4 ppt USNG

Building at grid: 1215 0924 Ex 5 ppt USNG

Practical Exercise (Camp Blanding Map) • Locate the 8 digit coordinate for the 7 points on your map 30

1. 2. 3. 4. 5. 6. 7. 17 R MP 05361516 17 R MP 04521665 17 R MP 04731701 17 R MP 05211585 17 R MP 05401551 17 R MP 06321356 17 R MP 04821445 USNG

USNG