united states national grid (usng) in florida richard butgereit 850-413-9907...
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United States National Grid United States National Grid (USNG) in Florida(USNG) in Florida
Richard [email protected]
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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 [email protected]
http://bit.ly/nsgic_usng