3001, Inc.
20050713
OP2005_14134_NC
Remote-sensing Image
3601 SW 2nd Ave, Suite Y, Gainesville, Fl 32607
3001, Inc.
This dataset is a single orthophoto from a collection of GeoTIFF
format natural color orthophotos covering the Southwest Florida Water
Management District.
An orthophoto is remotely sensed image data in which displacement of
features in the image caused by terrain relief and sensor
orientation have been mathematically removed. Orthophotography
combines the image characteristics of a photograph with the
geometric qualities of a map. Each orthophoto provides imagery for a
5,000 foot by 5,000 foot cell area on the ground. The
source imagery was obtained in January and February of 2005 and used to produce
orthophotos with a one foot ground sample distance (GSD). Imagery was acquired
at 0.85 foot GSD resolution. Flight height
maintained during mission was 8,650 feet AGL. The imagery was captured
at 12-bit radiometric resolution and converted to 8-bit radiometric
resolution during post processing. The imagery was captured with 20%
sidelap between all adjacent flight lines. The SWFWMD project area
was divided into 10 flight blocks due to neccessary base station and
flight line length requirements. The imagery was obtained and processed
by all digital means beginning with data acquisition using an ADS40
digital sensor. The orthophotos are available in GeoTIFF form.
The projected coordinate system is State Plane Florida West (Zone 902), NAD 83 HARN, GRS 80, Units Feet.
The purpose of the project is to provide the District with current year digital orthophotos.
The District reularly uses digital orthophotos to support regulatory, land management and acquistion,
planning, engineering and habitat restoration projects.
20050117
Date of image acquisition
Irregular
-82.8409857072
-82.8253750888
28.0863493869
28.0725039405
none
orthophoto
orthoimage
framework
none
Southwest Florida Water Management District
SWFWMD
None
These data were not collected under the supervision of a licensed Professional Surveyor and Mapper. Use of these data requires a general understanding of GIS.
Mailing and Physical Address
Brooksville
FL
34604-6899
2379 Broad Street (U.S. 41 South)
(352) 796-7211
(352) 540-6018
Southwest Florida Water Management District
Mapping and GIS Section
ESRI ArcCatalog 8.3.0.800
Sample points taken from overlapping areas of adjacent image strips
that contributed image chips to each orthophoto tile are typically
consistent to the 2-3 pixel level. This not only ensures that a
consistent mosaic can be created from the adjacent image strips acquired
with the ADS40 pushbroom scanner but also means that the images have
good precision and as a group are spatially self-consistent.
These data cover areas within the Southwest Florida Water Management District Boundary.
3001, Inc.
20050117
Digital Aerial Imagery for 2005 SWFWMD Orthophotography
3601 SW 2nd Ave, Suite Y, Gainesville, FL 32607
3001, Inc.
Additional Information: (352)379-3001
(Select One)
2400
disc
20050117
Date of image acquisition
dig_aer_img
Flight planning, image acquisition, image processing and image packaging.
Morgan and Eklund, Inc.
20050401
Ground Control for 2005 SWFWMD Orthophotography
8745 US Hwy 1, Wabasso, FL 32970
Morgan and Eklund, Inc.
Additional Information: (772)388-5364
2400
disc
20050323
Date ground control was collected
photo_control
Horizontal and vertical control used to establish positions and
elevations for reference and correlation purposes and as input to
the aerotriangulation process.
Southwest Florida Water Management District, Mapping and GIS Section
20050401
DEM for Orthorectification of 2005 SWFWMD Orthophotography
2379 Broad Street (U.S. 41 South), Brooksville, FL 34604-6899
Southwest Florida Water Management District, Mapping and GIS Section
Additional Information: (352) 796-7211
2400
disc
20050201
Date DEM was received from SWFWMD
ortho_dem
Ground elevations used for orthorectification process
Ground control consisted of photo identifiable surveyed points. The imagery was collected at an altitude of
8650 ft using an ADS40 digital sensor. Image quality was verified druing
the post flight review phase. Factors considered during this review included
but were not limited to the presence of smoke and/or cloud cover, contrails, light
conditions and sun glint.
The triangulated strips were rectified with a recent DEM of the
area provided by the SWFWMD. The vertical accuracy of the DEM varies based on the elevation
postings and is generally estimated at 15-30cm. The red, green
and blue bands were combined to generate a final orthophoto.
The ADS40 sensor collects twelve bit image data which requires
radiometric adjustment for output in standard eight bit image
channels. Converting to eight bit results in a reduction of the
color range from 4096 to 256 - thus loss of radiometric detail is
inevitable. The extra dynamic range of the sensor permits greater
object differentiation in shadows and in bright areas. The sixteen
bit dynamic range permitted the imagery to be more effectively color
balanced than is possible with eight bit imagery. This was accomplished
by performing tonal enhancements immediately prior to the reduction from
sixteen bit to eight bit data. In addition to color banancing these
eight bit images were adjusted to create seamless imagery to the highest
extent practically achievable.
The imagery was mosaicked using a combination of automated and
manual seamlines generation. Project specified tiles were
extracted from the mosaic. Final image tiles were reviewed for
artifacts and anomalies and adjusted as part of quality control
procedures. When necessary, local corrections to the
imagery were performed to minimize such effects.
withheld
withheld
withheld
200506
3001, Inc.
Peter Briere
Mailing & Physical Address
3601 SW 2nd Ave., Suite Y
Gainesville
FL
32607
(352) 379-3001
(352) 377-4234
8:00 a.m. to 5:00 p.m.
Peter Briere
3001, Inc.
Raster
coordinate pair
1.00
1.00
Foot_US
D_North_American_1983_HARN
GRS_1980
6378137
298.257222101
Mailing and Physical Address
Brooksville
FL
34604-6899
2379 Broad Street (U.S. 41 South)
(352) 796-7211
(352) 540-6018
8:00 a.m. to 5:00 p.m.
Southwest Florida Water Management District
Mapping and GIS Section
The data are being provided on an 'as is' basis. The District specifically disclaims any warranty, expressed or implied, including, but not limited to, the implied warranties or merchantability and fitness for a particular use. The entire risk as to quality and performance is with the user. In no event will the District or its staff be liable for any direct, indirect, incidental, special, consequential, or other damages, including loss of profit, arising out of the use of these data even if the District has been advised of the possibility of such damages. All data are intended for resource management use.
Translation of files to formats other than those described here is the sole responsibility of individuals downloading the data.
20050716
Mailing and Physical Address
Gainesville
FL
32607
3601 SW 2nd Ave., Suite Y
(352) 379-3001
8:00 a.m. to 5:00 p.m.
3001, Inc.
Peter Briere
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
local time
Version 6.2 (Build 9200) ; Esri ArcGIS 10.6.1.9328
Aerials2005
1
-82.858448
-82.542460
28.198723
27.563413
This dataset is a single orthophoto from a collection of GeoTIFF
format natural color orthophotos covering the Southwest Florida Water
Management District.
An orthophoto is remotely sensed image data in which displacement of
features in the image caused by terrain relief and sensor
orientation have been mathematically removed. Orthophotography
combines the image characteristics of a photograph with the
geometric qualities of a map. Each orthophoto provides imagery for a
5,000 foot by 5,000 foot cell area on the ground. The
source imagery was obtained in January and February of 2005 and used to produce
orthophotos with a one foot ground sample distance (GSD). Imagery was acquired
at 0.85 foot GSD resolution. Flight height
maintained during mission was 8,650 feet AGL. The imagery was captured
at 12-bit radiometric resolution and converted to 8-bit radiometric
resolution during post processing. The imagery was captured with 20%
sidelap between all adjacent flight lines. The SWFWMD project area
was divided into 10 flight blocks due to neccessary base station and
flight line length requirements. The imagery was obtained and processed
by all digital means beginning with data acquisition using an ADS40
digital sensor. The orthophotos are available in GeoTIFF form.
The projected coordinate system is State Plane Florida West (Zone 902), NAD 83 HARN, GRS 80, Units Feet.
Southwest Florida Water Management District
SWFWMD
orthophoto
orthoimage
framework
The purpose of the project is to provide the District with current year digital orthophotos.
The District reularly uses digital orthophotos to support...
Aerials2005
379653.999883
480420.999880
1174937.000045
1405348.000038
1
Projected
GCS_North_American_1983
Linear Unit: Foot_US (0.304801)
NAD_1983_StatePlane_Florida_West_FIPS_0902_Feet
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