Calvert/MD_calvert_hillshade

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Service Description: Calvert County, Maryland 2017 Lidar project called for the Planning, Acquisition, processing and derivative products of lidar data to be collected at a nominal pulse spacing (NPS) of .35m. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base Lidar Specification, Version 1.2. The data was developed based on a horizontal projection/datum of NAD83(2011), MD NAD83 G12B, feet and vertical datum of Geoid12B, US Feet. Lidar data was delivered as flightline-extent unclassified LAS swaths, as processed Classified LAS 1.4 files, formatted to 1139 individual 4000ft x 6000ft tiles, as tiled bare earth DEMs; all tiled to the same 4000ft x 6000ft MAryland Ortho Tile schema. Ground Conditions: Lidar was collected in early 2017, while no snow was on the ground and rivers were at or below normal levels. In order to post process the lidar data to meet task order specifications and meet ASPRS vertical accuracy guidelines, State of Maryland, Axis GeoSpatial LLC established a total of 16 ground control points that were used to calibrate the lidar to known ground locations established throughout the Calvert County, Maryland project area. An Additional 40 QA Checkpoints, 25 NVA and 15 VVA were used to calculate absolute vertical accuracies to verfiy data met USGS specifications.

Name: Calvert/MD_calvert_hillshade_m

Description: Calvert County, Maryland 2017 Lidar project called for the Planning, Acquisition, processing and derivative products of lidar data to be collected at a nominal pulse spacing (NPS) of .35m. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base Lidar Specification, Version 1.2. The data was developed based on a horizontal projection/datum of NAD83(2011), MD NAD83 G12B, feet and vertical datum of Geoid12B, US Feet. Lidar data was delivered as flightline-extent unclassified LAS swaths, as processed Classified LAS 1.4 files, formatted to 1139 individual 4000ft x 6000ft tiles, as tiled bare earth DEMs; all tiled to the same 4000ft x 6000ft MAryland Ortho Tile schema. Ground Conditions: Lidar was collected in early 2017, while no snow was on the ground and rivers were at or below normal levels. In order to post process the lidar data to meet task order specifications and meet ASPRS vertical accuracy guidelines, State of Maryland, Axis GeoSpatial LLC established a total of 16 ground control points that were used to calibrate the lidar to known ground locations established throughout the Calvert County, Maryland project area. An Additional 40 QA Checkpoints, 25 NVA and 15 VVA were used to calculate absolute vertical accuracies to verfiy data met USGS specifications.

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Calvert/MD_calvert_hillshade_m (ImageServer)