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Aerial Imaging and Data Collection
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Photogrammetric Mapping: Highlighted Projects
Project: Orthophoto and Mosaic Production
Client: U.S. Department of Agriculture-Forest Service

Photo Science created one-meter resolution color infrared orthophotos for two ranger districts within the Ashley National Forest from scanned resource photography. OrthoBASE software was used to collect ground control points from digital orthophoto quarter quads for features visible on both images, with elevation data collected from 10-meter digital elevation models. Processed orthophotos were clipped to eliminate black edges and were then tone balanced. Mosaics for each quadrangle and for entire ranger districts were created using OrthoVista software.

 

Project: Orthorectification and Mosaicing of Color Aerial Photography for the Main Eight Hawaiian Islands
Client: National Oceanic and Atmospheric Administration

Under this project, Photo Science orthorectified and mosaiced 207 selected color aerial photos of six of the eight main Hawaiian Islands (Hawaii, Kauai, Lanai, Maui, Molokai, and Oahu). Using digital imagery collected and scanned by NOAA, Photo Science defined and selected ground control from differential GPS data collection. All Government-supplied collected static ground control points were utilized to create a robust analytical triangulation solution. Digital elevation models and each bundle block adjustment were utilized to generate stereo pairs and orthorectify the imagery. Boeing SoftPlotter photogrammetric software was used for orthophoto creation. No tonal balancing was performed on the imagery to allow NOAA to utilize the imagery for the photointerpretation of 37 levels of benthic habitat. Creative cut lines between orthophotos were employed with particular attention paid to eliminating open water areas within the imagery that contained turbity, wave action, and sun glare. Minimal feathering along cut lines was used for visual presentation purposes did not affect photointerpretation quality.

The National Ocean Service is using this imagery to create maps of the region’s marine resources including coral reefs, seagrass beds and other important habitats for fisheries, tourism, and other aspects of the coastal economy.

Project: Airport Mapping
Client: National Geospatial-Intelligence Agency

Photo Science provided photogrammetric feature extraction and GIS mapping services for military airports and other military facilities worldwide as part of the “Ron Brown Initiative”. Photo Science utilized conventional aerial photography and surveyed ground control as well as information derived from National Technical Means to identify, analyze, and map all significant airport features and vertical obstructions including runways/taxiways, buildings, navigation aids, communication towers, power/communication lines, security perimeters etc., within a five-mile radius of the airport using softcopy feature extraction technology in a secure environment. The resultant data, the aircraft approach, and departure corridors were displayed in three dimensions to visualize and model potential vertical obstructions and other airfield threats hazards as well as identify and evaluate alternative solutions for corrective measures - ensuring safety of flight.

 

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