TITLE: FDOR CONTRACTED 1 FOOT IMAGERY BY COUNTY

Geodataset Name:       
Geodataset Type:       Raster Dataset
Geodataset Feature:    n/a
Feature Count:         n/a

DATA SOURCE(S):                    South West Florida Water Management District
SCALE OF ORIGINAL SOURCE MAPS:     2400
GEODATASET EXTENT:                 County Specific

PUBLICATION DATE:                  2010
TIME PERIOD OF CONTENT:            20100104
DOWNLOAD LINK:                     http://www.fgdl.org/metadataexplorer/explorer.jsp

Imagery Flight Date Info

County			Flight dates

Alachua			Dec 2007-Jan 2008
Baker			Jan-Feb 2008
Bay			Mar 2010
Bradford		Oct 2008-April 2009
Brevard			Nov 2008-Jan 2009
Broward			Dec 2008
Calhoun			Jan 2010
Charlotte		Dec 2009-Jan 2010
Citrus			Jan-Feb 2010
Clay			Jan 2008
Collier			Dec 2008-Jan 2009
Columbia		Apr 2010
DeSoto			Dec 2009-Jan 2010
Dixie			Dec 2009
Duval			Jan 2008
Escambia		Nov-Dec 2009
Flagler			Feb-Mar 2008
Franklin		Dec 2009
Gadsden			Feb 2010
Gilchrist		Dec 2009
Glades			Jan 2009
Gulf			Jan 2010
Hamilton		Dec 2009
Hardee			Dec 2009-Jan 2010
Hendry			Jan-Mar 2008
Hernando		Jan-Feb 2010
Highlands		Jan-Mar 2008
Hillsborough		Dec 2009-Jan 2010
Holmes			Dec 2008
Indian River		Nov-Dec 2008
Jackson			Mar 2010
Jefferson		Jan 2010
Lafayette		Dec 2009
Lake			Jan-Feb 2008
Lee			Dec 2007-Jan 2008
Leon			Jan 2009
Levy			Jan-Feb 2010
Liberty			Dec 2009
Madison			Dec 2009
Manatee			Dec 2009-Jan 2010
Marion			Jan-Feb 2008
Martin			Jan 2009
Miami-Dade		Jan 2009
Monroe			Dec 2008-Jan 2009
Nassau			Jan 2008
Okaloosa		Oct 2009
Okeechobee		Jan-Mar 2009
Orange			May 2008
Osceola			Jan 2008
Palm Beach		Jan-Feb 2009
Pasco			Dec 2009-Feb 2010
Pinellas		Dec 2009-Jan 2010
Polk			Dec 2009-Jan 2010
Putnam			Feb-Apr 2008
Santa Rosa		Nov 2009
Sarasota		Dec 2009-Jan 2010
Seminole		Jan 2009
St. Johns		Jan 2008
St. Lucie		Mar-Apr 2009
Sumter			Jan-Feb 2010
Suwannee		Mar 2010
Taylor			Mar 2010
Union			Oct 2008-April 2009
Volusia			Oct 2008-April 2009
Wakulla			Feb 2010
Walton			Oct 2009
Washington		Dec 2008

Vendor QC Process:
Compliance with the accuracy standard was ensured by the verification of photo 
identifiable GPS ground control after the acquisition of aerial imagery. The 
following checks were performed.

1. The DMC data was checked against the project control. The technician visited 
and confirmed the accuracy of the points during initial processing.
2. Digital orthophotography was validated through an inspection of edge matching 
and visual inspection for image quality.

Southwest Florida Water Management District QC Process:
The imagery data layer stored in the District's enterprise database is opened in 
ArcMap.  The District's project grid is also added.  The imagery is scanned at 
1:6,000 looking at each grid cell individually.  If a problem is found, then a point 
shapefile is created and a point in the location of the problem is added.  Comments 
are added to the shapefile in an attribute field about the problem and a bitmap is 
created displaying the area with the problem.  Each bitmap includes: comments 
added to the shapefile, grid cell number, date, initials of the QC staff, and whether 
the image is natural color or color infrared.  After all the grids have been scanned, 
the imagery is drawn to the full extent.  The overall color balance and offset is 
checked.  Possible problems that are reviewed include: color balance between 
cutlines over land, offsets over 8 feet, missing data, anomalies, and overall color 
balance.

Orthophotos are visually inspected for completeness to ensure that no gaps or 
image misplacements exist within and between adjacent images.  These images 
are derived by mosaicking multiple images to ensure complete coverage of the 
project area.

See Horizontal and Vertical Accuracy reports.  There are no Attributes in this data 
set.

<Mosaiced>: No
				<Color Balanced>: Yes
				<Geo Referenced>: Yes
				<Image File Format>: GeoTIFF
				<Unprocessed Image Data Available>: No
				<Bit Depth>: 32
				<Spatial Resolution>: 1-Foot
				<Sensor>: DMC
				<Spectral Range>: RGB
				<Spectral Range>: CIR
				<Stereo Acquistion>: No
				<Environmental Constraints>: 
  			<Environmental Constraint Desription>: All images 
will be obtained under cloud free conditions and will be free of obscuring haze, 
smoke or other atmospheric conditions. All images are collected between 10:00 
AM to 2:30 PM to minimize shadows.
  			<Environmental Constraint Clouds>: 0%
  			<Environmental Constraint Smoke>: 0%
  			<Environmental Constraint Haze>: 0%
  			<Environmental Constraint Sun Angle>: greater than 30 degrees
  			<Environmental Constraint Turbidity>: Not Applicable
				<Image Tidal Datum>: Not Applicable

The District regularly uses digital orthophotos to support regulatory, land 
management and acquisition, planning, engineering and habitat restoration 
projects.

Orthophotogrammetric Mapping met or exceeded a verified horizontal accuracy of 
7.6 feet at the 95% confidence interval (4.4 feet RMSE) as specified in the FGDC 
Geospatial Positioning Accuracy Standards, Part 3: National Standard for Spatial 
Data Accuracy (NSSDA). A minimum of thirty (30) independent image checkpoints 
within the project area were used for verification.  Check points were distributed so 
that points are spaced at intervals of at least ten (10) percent of the diagonal 
distance across the dataset and at least twenty (20) percent of the points are 
located in each quadrant of the dataset. The Consultant did not correct for 
"building lean" in urban areas.  For more information please see project related 
minimum technical standards report.

No vertical accuracy analysis required for the orthophotos.

The orthophotos were collected under the supervision of a licensed Florida 
Professional Surveyor and Mapper.  Use of these data requires a general 
understanding of GIS and spatial data.

The Florida Geographic Data Library is a collection of Geospatial Data
compiled by the University of Florida GeoPlan Center with support from
the Florida Department of Transportation. GIS data available in FGDL is
collected from various state, federal, and other agencies (data sources)
who are data stewards, producers, or publishers. The data available in
FGDL may not be the most current version of the data offered by the
data source. University of Florida GeoPlan Center makes no guarantees
about the currentness of the data and suggests that data users check
with the data source to see if more recent versions of the data exist.

Furthermore, the GIS data available in the FGDL are provided 'as is'.
The University of Florida GeoPlan Center makes no warranties, guaranties
or representations as to the truth, accuracy or completeness of the data
provided by the data sources. The University of Florida GeoPlan Center
makes no representations or warranties about the quality or suitability
of the materials, either expressly or implied, including but not limited
to any implied warranties of merchantability, fitness for a particular
purpose, or non-infringement. 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.htmlNone

The digital orthophotography is comprised of a 4 band half foot pixel. Once the Z/I 
Intergraph DMC RGB/IR data was integrated into the Intergraph Software system 
the initial radiometric adjustments were performed on the imagery for each flight 
line attempting to reach the best possible histogram. The rectification process was 
run using various LiDAR and DTM surfaces and the radiometrically balanced 
imagery on each flight line. Manual seamlines were placed to follow geographic 
features to help hide the location of the seamlines. Care was also taken to avoid 
cutting physical features such as buildings. DEM surfaces were provided by 
SWFWMD. QA/QC was performed looking for smears and other indications of 
problems within the digital orthophoto creation process. The created tiles are 
reviewed again for anomalies and interactive radiometric adjustment applied where 
needed. The final product was GeoTIFF format digital orthos.
Process Date: 2010

Name:
Abbr. Name:
Address:


Phone:

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

Southwest Florida Water Management District
Ground Control
2379 Broad Street (U.S. 41 South)
Brooksville, FL
34604-6899
(352) 796-7211




Mapping and GIS Section