maine geological survey lidar

endobj The technicians utilized commercial and proprietary software packages to analyze how well flight line overlaps match for the entire lift and adjusted as necessary until the results met the project specifications. Acknowledgement of the U.S. Geological Survey would be appreciated for products derived from these data. 22 State House Station Maine's coastal beaches and dune are constantly changing. �׵"0Na`��������l��s����. Users looking for lidar data and/or data derivatives should contact, ... Maine,Maine Geological Survey,Base map,Lidar,MaineGS AntialiasingMode: None TextAntialiasingMode: Force. Data Description and Usage. 3) Once the boresight angle calculation was completed for the selected areas, the adjusted settings were applied to all of the flight lines of the lift and checked for consistency. ���z�g�hR$�x�����V-�/��5H�^u3|�X���6�;�ٲ���n�� �]��"����~��3�%뮽����U\ All bridge decks were classified to Class 17. The NVA of the DEM was calculated using 118 independent checkpoints located in the Bare Earth and Urban land cover categories. These areas are well distributed in the lift coverage and cover multiple terrain types that are necessary for boresight angle calculation. Metadata in InPort, »  Contributing After the bare-earth surface is finalized, it is then used to generate all hydro-breaklines through heads-up digitization. An additional 205 independent accuracy checkpoints, 118 in Bare Earth and Urban landcovers (118 NVA points), 87 in Forested, Brushland/Trees, and Tall Weeds/Crops categories (87 VVA points), were used to assess the vertical accuracy of the data. ���tW�ǟv=6�&�!I�'Ƣ��3���YX9x���â��s�����3�^ j��ST �)��x�a "ރ]8���I�C)�&׶�f$�t� ����D9 �b�)�i(�4'�.�Pe�文���%�v;�M�(�Ҹ�X��3T�_g�pD��I��D��4#ǹ�ɜd The Item may not be in the Public Domain under the laws of other countries. The data was developed based on a horizontal projection/datum of NAD83 (2011) UTM Zone 19, meters and vertical datum of NAVD1988 (Geoid 12B), meters. Not all of the printed maps and publications are available online. Please CALL the main office line, 287-2801, and you will be directed to the appropriate … Alert: Stay up to date on Maine's COVID-19 Response, DACF Home → This is a required accuracy. Point locations and extent polygons of Maine inland landslides (landslides not related to coastal processes), interpreted and digitized from lidar topographic data (generally at 1:5,000 scale) by Maine Geological Survey staff. The years of aerial photography and LiDAR can be found in the legend of the corresponding Open-File Map. 22 State House Station The checkpoints were distributed throughout the project area and were surveyed using GPS techniques. "lasolap" : "Swath "overage" points were identified in these files using the standard LAS overlap bit", "clasitem" : "Processed, but unclassified". These classes were created through automated processes only and were not verified for classification accuracy. <>/ExtGState<>/XObject<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/Annots[ 29 0 R] /MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> Partial upload of Positional Accuracy fields only. 18 Elkins Lane The following reports are available for this data set: 1. The raw point cloud is of good quality and data passes Non-Vegetated Vertical Accuracy specifications. As one of the cornerstones of the U.S. Geological Survey’s (USGS) National Geospatial Program, The National Map is a collaborative effort among the USGS and other Federal, State, and local partners to improve and deliver topographic information for the Nation.

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