Geodataset Name:       FL_USNG_10K
Geodataset Type:       SHAPEFILE
Geodataset Feature:    Polygon
Feature Count:         3660

DATA SOURCE(S):                    University of Florida GeoPlan Center
SCALE OF ORIGINAL SOURCE MAPS:     N/A
DATE OF AUTOMATION OF SOURCE:      20070426
GEODATASET EXTENT:                 State of Florida

FEATURE ATTRIBUTE TABLES:

Datafile Name: FL_USNG_10K.DBF

FEATURE ATTRIBUTE TABLES CODES AND VALUES:

Item	Item Description
OBJECTID	Internal feature number.
X_LWRLFT	X coordinate of the lower left hand corner of the polygon.
Y_LWRLFT	Y coordinate of the lower left hand corner of the polygon.
GRID100K	100,000-meter Square Identification; for regional areas, identified by two letter values.
GRID10K	10,000-meter grid label for the local area.
LABEL	Concatenated 100K grid label and 10K grid label.
DESCRIPT	Based on LABEL.
FGDLAQDATE	The date FGDL acquired the data from the source.
AUTOID	GeoPlan internal feature identification number.
SHAPE	Feature geometry.
SHAPE.AREA	Area in meters
SHAPE.LEN	Perimeter in meters

USER NOTES:

This data is provided 'as is'. GeoPlan relied on the integrity of the original data layer's topology

This data is provided 'as is' by GeoPlan and is complete to our knowledge.

GeoPlan relied on the integrity of the attribute information within the original data.

How to Read a United States National Grid (USNG) Spatial Address http://www.fgdc.gov/usng/how-to-read-usng/index_html --------------------------------------------------------------- The USNG is an alpha-numeric reference system that overlays the UTM coordinate system. A USNG spatial address is broken down into three parts, the; - Grid Zone Designation; for a world-wide unique address. - 100,000-meter Square Identification; for regional areas. - Grid Coordinates; for local areas. 4 digits - 2306 - locates a point with a precision of 1,000-meters (a neighborhood size area). 6 digits - 234064 - locates a point with a precision of 100-meters (a soccer field size area). 8 digits - 23480647 - locates a point with a precision of 10-meters (the size of a modest home). 10 digits - 2348306479 - locates a point with a precision of 1-meter (within a parking spot). To review, we can see a complete US National Grid spatial address contains three parts as we drill down to a unique location, 18S UJ 23480647 - Grid Zone Designation (i.e. 18S). - 100,000-meter Square Identification (i.e. UJ ). - Grid coordinates of some even number of digits ranging from 2 to 10 (i.e. 23480647 In this case, eight digits identify a place of about the size of a modest home.). You always read right, then up when plotting coordinates. A spatial address is customarily written as a single string of values. Note how the horizontal datum (NAD 83) has been included: USNG: 18SUJ23480647 (NAD 83) Floridadisaster.org --------------------------------------------------------------- In an effort to standardize maps in Florida for both emergency and other operations, the State Fire Marshal, as the coordinating agency for search and rescue under the State Comprehensive Emergency Management Plan, and the Division of Emergency Management are embarking on a program to adopt the US National Grid (USNG) as the standard in Florida. This project will ensure a uniform grid mapping system across cities and counties in Florida, and will match the system used by the National Guard, the US Coast Guard and the US military when they are deployed into our state. Florida s unique geography of miles of coastlines, multiple river corridors, and large watersheds make the use of the common Township/Range/Section grid (PLSS) all but impossible except for a handful of inland counties. As the grid approaches wetlands, river corridors and the coast line, sections become irregular in shape and can be significantly larger than the typical square mile, which is too large to accommodate the needs of ground crews. Adoption of a national grid system has been identified as critical in a number of after action reports, investigations and studies dating as far back as Hurricane Andrew. FEMA, DHS, the National GeoSpatial Intelligence Agency, and the Federal Geographic Data Committee all promote the adoption of the USNG. Grid cell values are unique and sequentially numbered.

The grid serves as a common means for providing locational information in relation to USNG coordinates.

The grid's horizontal accuracy was mathematically generated and is accurate to the internal precision of ArcGIS 9.1 coordinates.

The grid's vertical accuracy was mathematically generated and is accurate to the internal precision of ArcGIS 9.1 coordinates.

THE DATA INCLUDED IN FGDL ARE 'AS IS' AND SHOULD NOT BE CONSTRUED AS LEGALLY BINDING. THE UNIVERSITY OF FLORIDA GEOPLAN CENTER SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED AS A RESULT OF USING, MODIFYING, CONTRIBUTING OR DISTRIBUTING THE MATERIALS. A note about data scale: Scale is an important factor in data usage. Certain scale datasets are not suitable for some project, analysis, or modeling purposes. Please be sure you are using the best available data. 1:24000 scale datasets are recommended for projects that are at the county level. 1:24000 data should NOT be used for high accuracy base mapping such as property parcel boundaries. 1:100000 scale datasets are recommended for projects that are at the multi-county or regional level. 1:125000 scale datasets are recommended for projects that are at the regional or state level or larger. Vector datasets with no defined scale or accuracy should be considered suspect. Make sure you are familiar with your data before using it for projects or analysis. Every effort has been made to supply the user with data documentation. For additional information, see the References section and the Data Source Contact section of this documentation. For more information regarding scale and accuracy, see our webpage at: http://geoplan.ufl.edu/education.html

REFERENCES:

Florida State Emergency Response Team United States National Grid http://floridadisaster.org/gis/usng/ Guidelines for Building US National Grid Polygons with ArcGIS http://floridadisaster.org/gis/usng/Documents/build_usng_polygons.pdf

DATA LINEAGE SUMMARY:

This grid was produced by FEMA GIS Analyst John Correa using the Fishnet tool downloadable from arcscripts.esri.com for use with ArcGIS 9.1. In a data view with the coordinate system set to NAD_83_UTM_Zone_17N, a 10,000 meter by 10,000 grid was generated covering the area of Florida contained within the UTM 17 N zone. Overlap was included for use in neighboring areas. For more information on field calculations please see Guidelines for Building US National Grid Polygons with ArcGIS http://floridadisaster.org/gis/usng/Documents/build_usng_polygons.pdf Process Date: 20070102 This grid was produced by FEMA GIS Analyst John Correa using the Fishnet tool downloadable from arcscripts.esri.com for use with ArcGIS 9.1. In a data view with the coordinate system set to NAD_83_UTM_Zone_16N, a 10,000 meter by 10,000 grid was generated covering the area of Florida contained within the UTM 16 N zone. Overlap was included for use in neighboring areas. For more information on field calculations please see Guidelines for Building US National Grid Polygons with ArcGIS http://floridadisaster.org/gis/usng/Documents/build_usng_polygons.pdf Process Date: 20070102 The University of Florida GeoPlan Center downloaded these datasets from the Florida Division of Emergency Management's website; http://floridadisaster.org/gis/usng/ fl_usng_10k_utm_16.shp fl_usng_10k_utm_17.shp Added fields: DESCRIPT, FGDLAQDATE, and AUTOID. Calculated the AUTOID field for fl_usng_10k_utm_17.shp as follows; [FID] + 1 Calculated the AUTOID field for fl_usng_10k_utm_16.shp as follows; [FID] + 2501 Calculated DESCRIPT based on LABEL. Calculated FGDLAQDATE based on the date the data was downloaded from the source. Next the two shapefiles were reprojected to the FGDL Albers projection (NAD83 Albers HPGH). Next selections were taken from each utm zone where as they did not interest each other. These two selections were then appended together to create a statewide layer where areas containing the over lap contained no data. Next each zone was selected for where features overlapped each zone and these overlap features were exported for each shapefile. Each exported zones over lap features were then erased, this erase was base on features falling outside their designated 100K grid, this erase was based on the fl_usgn_100k.shp Next the remaining parts of the two erased zone shapefiles were appended back to the statewide 10K layer creating a continuous statewide 10K layer. Process Date: 20070426

MAP PROJECTION PARAMETERS:

Projection                          ALBERS
Datum                               HPGN
Units                               METERS
Spheroid                            GRS1980
1st Standard Parallel               24  0  0.000
2nd Standard Parallel               31 30  0.000
Central Meridian                   -84 00  0.000
Latitude of Projection's Origin     24  0  0.000
False Easting (meters)              400000.00000
False Northing (meters)             0.00000

DATA SOURCE CONTACT (S):

Name:
Abbr. Name:
Address:


Phone:

Web site:
E-mail:
Contact Person:
         Phone:
        E-mail:

University of Florida GeoPlan Center
GeoPlan
431 ARCH BLDG
Gainesville, FL
32611



www.fgdl.org
data@geoplan.ufl.edu

Name:                   FLORIDA GEOGRAPHIC DATA LIBRARY
Abbr. Name:             FGDL
Address:                Florida Geographic Data Library
                        431 Architecture Building
                        PO Box 115706
                        Gainesville, FL  32611-5706
Web site:               http://www.fgdl.org

Contact FGDL: 

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