{ "culture": "en-US", "name": "orthoCoastalMidcoast2023", "guid": "", "catalogPath": "", "snippet": "High-resolution true color aerial imagery was collected for use as a raster base image for coastal mapping projects and the development of new raster and vector data sets in support of mapping seagrass and tidal marshes on the coast of Maine.", "description": "

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\u201d 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.<\/SPAN><\/P><\/DIV><\/DIV><\/DIV>", "summary": "High-resolution true color aerial imagery was collected for use as a raster base image for coastal mapping projects and the development of new raster and vector data sets in support of mapping seagrass and tidal marshes on the coast of Maine.", "title": "orthoCoastalMidcoast2023", "tags": [ "Coastal Maine", "imageryBaseMapsEarthCover", "orthoimagery", "aerial imagery", "aerial image", "basemap aerials", "orthophotography", "eelgrass", "seagrass", "tidal marsh", "digital orthophoto", "Phippsburg", "Georgetown", "Woolwich", "Popham Beach", "Reid", "Bath", "Arrowsic", "Brunswick", "Bowdoinham", "Swan Island", "Richmond", "Dresdon", "Pittston", "Randolph", "Gardiner", "Chelsea", "Farmingdale", "Hallowell", "Augusta", "Boothbay", "Boothbay Harbor", "Southport", "Westport Island", "Edgecomb", "Wiscasset", "Newcastle", "Alna", "South Bristol", "Bristol", "Damariscotta", "Nobleboro", "Bremen", "Waldoboro", "Monhegan Island", "St. George", "Friendship", "Cushing", "South Thomaston", "Thomaston", "Warren" ], "type": "Image Service", "typeKeywords": [ "Data", "Service", "Image Service", "ArcGIS Server" ], "thumbnail": "", "url": "https://gis.maine.gov/arcgis", "minScale": 3.69019338444993E7, "maxScale": 18018.5223850094, "spatialReference": "NAD_1983_UTM_Zone_19N", "accessInformation": "Orthophotos were produced for the State of Maine Department of Environmental Protection. James W. Sewall was the primary contractor and Bluesky Geospatial was subcontracted for aerial imagery acquisition and orthophotography development.", "licenseInfo": "

The State of Maine Department of Environmental Protection (DEP) makes this information available to enhance public knowledge and promote education. The State of Maine DEP also retains the right to make changes to the data without prior notice. Neither the State of Maine DEP, nor any of its 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 data, nor represent that its use would not infringe on privately owned rights. The data are provided with the understanding that they are not guaranteed to be usable, timely, accurate, or complete, and it should not be used for navigational purposes. The State of Maine DEP assumes no liability, any damages or loss of any kind that might arise from the use of, misuse of, or the inability to use these data. The State of Maine DEP assumes no liability for any damages or loss of any kind caused by any errors or omissions in the data. All data are distributed \"as is,\" without warranties of any kind, either express or implied, and subject to the terms and conditions stated in this disclaimer.<\/SPAN><\/P><\/DIV><\/DIV><\/DIV>" }