TITLE: 2011 Digital Orthophotos - Desoto County

Geodataset Name:       
Geodataset Type:       
Geodataset Feature:    
Feature Count:         

DATA SOURCE(S):                    Merrick & Company
SCALE OF ORIGINAL SOURCE MAPS:     2400
GEODATASET EXTENT:                 

PUBLICATION DATE:                  2011
TIME PERIOD OF CONTENT:            Begin Date: 20110109    End Date: 20110128
DOWNLOAD LINK:                     http://www.fgdl.org/metadataexplorer/explorer.jsp

Imagery Flight Date Info

County			Flight dates

Alachua			Mar 2011
Baker			Jan 2011
Bay			Dec 2012-Feb 2013
Bradford		Dec 2012
Brevard			Feb 2012
Broward			Dec 2011
Calhoun			Jan 2013
Charlotte		Jan 2011
Citrus			Dec 2010-Feb 2011
Clay			Nov 2010
Collier			Dec 2011-Jan 2012
Columbia		Oct 2012
DeSoto			Jan 2011
Dixie			Dec 2012-Jan 2013
Duval			Nov 2010
Escambia		Jan 2013
Flagler			Apr 2011
Franklin		Feb 2013
Gadsden			Nov 2012
Gilchrist		Dec 2012-Jan 2013
Glades			Jan 2012
Gulf			Jan 2013
Hamilton		Dec 2012
Hardee			Jan 2011
Hendry			Jan 2011
Hernando		Dec 2010-Feb 2011
Highlands		Jan 2011
Hillsborough		Dec 2010-Jan 2011
Holmes			Dec 2012
Indian River		Apr 2012
Jackson			Oct 2102
Jefferson		Nov 2012
Lafayette		Dec 2012-Jan 2013
Lake			Mar 2011
Lee			Jan-Mar 2011
Leon			Jan-Feb 2012
Levy			Dec 2012
Liberty			Feb 2013
Madison			Dec 2012
Manatee			Dec 2010-Jan 2011
Marion			Dec 2010
Martin			Apr 2012
Miami-Dade              Dec 2011-Mar 2012
Monroe			Jan-Mar 2012
Nassau			Dec 2010
Okaloosa		Dec 2012-Apr 2013
Okeechobee		Jan-Mar 2011
Orange                  Jan 2012
Osceola                 Oct 2011
Palm Beach		Nov-Dec 2010
Pasco			Dec 2010-Jan 2011
Pinellas		Dec 2010
Polk			Jan 2011
Putnam			Nov 2010
Santa Rosa	        Oct 2012
Sarasota                Dec 2010-Mar 2011
Seminole		Jan 2012
St. Johns		Dec 2010
St. Lucie		Apr 2012
Sumter			Dec 2010-Feb 2011
Suwannee		Dec 2012-Mar 2013
Taylor			Mar 2013
Union			Dec 2012
Volusia			Jan 2012
Wakulla			Nov 2012
Walton			Jan 2013
Washington		Dec 2012


See Process step for detailed QC procedures

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>: ADS40
<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 5.2 feet at the 95% confidence interval (3.0 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.

Translation of files to formats other than those described here is the sole responsibility of individuals using the data.NoneNeither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights.

1 - Check control and calculate RMSE.
2 - Create seam lines for RGBIR dataset using INPHO Suite Seam Line Editor.
3 - Export seam line file to shape file format.
4 - Create color-balanced mosaics for RGBIR dataset using INPHO Suite.
5 - QC RGBIR mosaic using Adobe Photoshop 9.x.
6 - Apply histogram strectch to 4 bands.
7 - Clip stacked mosaics into delivery tile format / dimensions using INPHO Suite.
8 - Verify control is within tolerance.
9 - Apply Geotiff Tag and Keys.
Process Date: 2011

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


\\ARC11\D$\swfwmd_2011_ortho\metadata\Southeast_District_Orthophoto_Project_Wide_Metadata_Template

Mapping and GIS Section