United States National Grid United States National Grid (USNG) in Florida(USNG) in Florida

Richard Butgereit850-413-9907richard.butgereit@em.myflorida.com

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Florida Adopts the USNG• USNG was officially adopted by the Florida Fire

Chiefs Association• FDEM to adopt the USNG in the States CEMP• Updates of GIS/Maps in the 11 Regional

Evacuation Studies include USNG grids• Florida Fire College, Florida Fire Chiefs

Association, FL National Guard have develop curriculum and instructor manuals

• Fire College has incorporated an intro module in the Firefighter II curriculum

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What’s wrong with current systems?

We already have…

– Latitude/Longitude

–Township/Range/Section

– Street Address and Zip

– UTM

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Latitude/Longitude

Multiple formats are confusing

DD -85.990151, 30.272240

DM -85 59.409089, 30.16.334386

DMS 85 59’24.545”W, 30 16’20.063”N

All the same location!!!

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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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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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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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Street Address and Zip

• Problematic due to…

– rural routes

– post office boxes

–House numbers missing or obscured

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• What do you do when the SIGNS are gone?

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• What do you do when the ROADS are gone?

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16R GU 66000 64820

How to read USNG

100,000 Meter Grid – identification for regional areas

Grid Coordinates – Easting and Northing position

Grid Zone Designation – for a world-wide unique address, identifies the longitude zone number and the latitude band letter

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16R GU 66000 64820

16R 17R

Truncate for locality

• just like you don’t have to dial an area code to make a local call…• all Florida locations will be 16R or 17R

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16R GU 66000 64820

16R 17R

Truncate for locality

• 100,000 meter zone designation may be dropped when working locally

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Truncate for less precision…

Locates within 1000 meters66 64

6600 6482 Locates within 10 meters

660 648 Locates within 100 meters

66000 64820 Locates within 1 meter

16R GU 66000 64820

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USNG

• Easily scaleable

• Pin-point and cell

based locational reporting

• “Grid within a Grid”

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Global Positioning Systems

• I have GPS……..why do I need to care about any of this?

– USNG can be used with GPS

– GPS supplements USNG

– USNG will work when your GPS won’t

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USNG and GPS

• Most GPS units explicitly support USNG as an option for units

• If you choose USNG, you must also choose NAD 83 as your datum (or technically, you haven’t chosen USNG)

• You may also choose MGRS with NAD 83 to be the functional equivalent of USNG

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Support for USNG• FDEM’s Incident Mapper

– simple Google Maps mashup w/ USNG tools

• Support in GIS Applications

• “Geo”PDF’s– new PDF formats have GIS capabilities,

including USNG support

• USGS Image Maps

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USNG in ArcGIS 9.1• USNG National Grid Tools

Repackaging of…

–Military Analyst

–Product line tool set (PLTS)

• USNG Locational Toolbar

Available from ArcScripts

–Less complicated, easier to use

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USNG in ArcGIS 9.2/9.3• Integrated…

– IdentifyProblematic in 9.2 (too much precision), fixed in 9.3

– Go to X,Y Tool

– Graticules

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Military Analyst in ArcGIS 9.2/9.3USNG coordinates may easily be added to a feature class.

NAR-C isproper NAD 83 choice - “North American Reference CONUS”

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Military Analyst in ArcGIS 9.2/9.3USNG coordinates added to a feature class.

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Map Books in ArcGIS 9.2/9.3Sample county map book easily create in ArcMap

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Map Books in ArcGIS 9.2/9.3• DS Map Book (free extension to ArcMap)• Produce 5,000 m x 4,000 8.5” x 11” 1:24,000 scale maps• Style guide, templates and video from Delta State

University linked from our website

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USNG in Other Applications• Delorme’s XMAP

• GeoPDF

• Dolph Maps

• New USGS Quad Maps

• The National Map

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Florida Geographic Data Library• Hosts 1,000

meter and 100 meter grids for each Florida county

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GeoPDF

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USGS Orthoimage Maps• New map series provided by

USGS• Based on the 7.5 quadrangle map

series• Most are GeoPDF’s• KML index file facilitates download

from web sites

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United States National Grid United States National Grid (USNG) in Florida(USNG) in Florida

Richard Butgereit850-413-9907richard.butgereit@em.myflorida.com

http://bit.ly/nsgic_usng