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2017-036
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2017-036
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Last modified
3/15/2017 2:34:56 PM
Creation date
3/15/2017 2:34:33 PM
Metadata
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Template:
Official Documents
Official Document Type
Work Order
Approved Date
03/14/2017
Control Number
2017-036
Agenda Item Number
8.E.
Entity Name
CB&I Coastal Planning & Engineering
Subject
Dune Repair Project
Area
Sector 3 Project area
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The flight will be conducted on an incoming tide and when there is sufficient visibility in coastal waters to capture <br />nearshore hardbottom. Film will be selected to provide the best possible images in the greatest possible water <br />depths. Photography will be obtained during morning hours with cloud cover at less than 10%, and in order to <br />minimize glint, the flight window shall occur when the sun angle is between 15 to 30 degrees to the horizon. If, <br />during the flight, weather conditions deteriorate to the point that the purposes of the flight cannot be met, or the five <br />flight conditions are not satisfied, the flight will be aborted and flown at a later date when conditions are satisfactory. <br />The photography will employ the use of an aerial camera approved by the US Geological Survey. The camera will <br />be equipped with a data block, which will record the lens number, calibration, focal length of the lens, altitude, date, <br />and time. The photographs will be color aerial photography and geo-referenced digital imagery with the following <br />specifications: <br />1. A minimum 60% overlap with each adjacent photograph and a ratio of 50% land and 50% ocean (2000' and <br />2000') on the horizontal. <br />2. The image will be clear and sharp in detail, free from clouds, shadows or any other blemishes that would <br />render the image as uncertain for mapping rock and reef features as far offshore as possible and no less than <br />-15 feet, NAVD. <br />3. Each frame will contain: <br />i. time of day clock in standard time, <br />ii. altimeter reading, <br />iii. exposure counter, <br />iv. camera identification number, <br />v. lens focal length in mm, and <br />vi. the plate ID number. <br />Necessary ground control will be extracted from existing imagery sources and used in combination with collected <br />ABGPS to rectify this imagery. It is assumed that previous control points can be used and have been previously <br />surveyed. No additional field work is included in this proposal. <br />Deliverables <br />CB&I will provide the following deliverables to the County and FDEP: <br />1. Camera Calibration Report. <br />2. Flight Report — includes Flight Log, Weather Log, and Tide Log. <br />3. Individual geo-referenced image frames in uncompressed TIFF format and associated world files stored on <br />DVD. <br />4. Mosaicked geo-referenced files in JPEG format on DVD. <br />5. MetaData - Complete federally compliant metadata file in ASCII or HTML format for the flight and image <br />processing. <br />
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