This dataset consists of true color aerial imagery of Midcoast coastal region between Small Point in Phippsburg, ME and Marshall Point in Port Clyde, ME and was captured at 14.5-cm GSD and used to produce high resolution 6” orthorectified imagery with a one-foot accuracy. Imagery was collected over four flights on July 7, August 2, August 3, and August 6, 2023, during low tide conditions and within two hours of spring tides. Additional atmospheric considerations that were considered before each lift included flying in a sun angle between 20 degrees and 50 degrees, no more than 10% cloud cover, and less than 10 knots of a maximum predicted wind velocity. Additionally, flights were not dispatched after large precipitation events in the preceding 48 hours, although small precipitation events up to 0.1 inches were recorded on some occasions. The project area consisted of approximately 2,879 images on 28 flight lines with 60% forelap and 30% sidelap. Airborne GPS and IMU were utilized during the acquisition to improve the aerotriangulation solution. Raw imagery was acquired using the Vexcel Eagle 80-mm Mark 3 mounted on a fixed wing aircraft and flown at an elevation of approximately 9,500 feet. Digital ortho-rectified imagery was created using the raw digital aerial imagery, ground control, aerotriangulation, and a digital elevation model. Existing State of Maine ground control and new ground control points were utilized in the aerotriangulation solution for this project. These aerial survey products were under contract for the State of Maine Department of Environmental Protection. Bluesky Geospatial was subcontracted to capture the raw aerial imagery and process the raw imagery to develop the aerotriangulation solution and to create digital orthophotos and related products. James W. Sewall was contracted to verify that project specifications were met.

This dataset consists of true color aerial imagery of Midcoast coastal region between Small Point in Phippsburg, ME and Marshall Point in Port Clyde, ME and was captured at 14.5-cm GSD and used to produce high resolution 6” orthorectified imagery with a one-foot accuracy. Imagery was collected over four flights on July 7, August 2, August 3, and August 6, 2023, during low tide conditions and within two hours of spring tides. Additional atmospheric considerations that were considered before each lift included flying in a sun angle between 20 degrees and 50 degrees, no more than 10% cloud cover, and less than 10 knots of a maximum predicted wind velocity. Additionally, flights were not dispatched after large precipitation events in the preceding 48 hours, although small precipitation events up to 0.1 inches were recorded on some occasions. The project area consisted of approximately 2,879 images on 28 flight lines with 60% forelap and 30% sidelap. Airborne GPS and IMU were utilized during the acquisition to improve the aerotriangulation solution. Raw imagery was acquired using the Vexcel Eagle 80-mm Mark 3 mounted on a fixed wing aircraft and flown at an elevation of approximately 9,500 feet. Digital ortho-rectified imagery was created using the raw digital aerial imagery, ground control, aerotriangulation, and a digital elevation model. Existing State of Maine ground control and new ground control points were utilized in the aerotriangulation solution for this project. These aerial survey products were under contract for the State of Maine Department of Environmental Protection. Bluesky Geospatial was subcontracted to capture the raw aerial imagery and process the raw imagery to develop the aerotriangulation solution and to create digital orthophotos and related products. James W. Sewall was contracted to verify that project specifications were met.