| snippet:
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Detailed surface elevation data for use in conservation planning, design, research, floodplain mapping, dam safety assessments and elevation modeling, etc. Classified LAS files are used to show the manually reviewed bare earth surface. |
| summary:
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Detailed surface elevation data for use in conservation planning, design, research, floodplain mapping, dam safety assessments and elevation modeling, etc. Classified LAS files are used to show the manually reviewed bare earth surface. |
| accessInformation:
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USGS, State of Maryland, Sanborn Map Company, Inc. |
| thumbnail:
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| maxScale:
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18055.954822 |
| typeKeywords:
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["Data","Service","Image Service","ArcGIS Server"] |
| description:
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Class 2 (Ground) lidar points in conjunction with the hydro breaklines were used to create a 1 foot hydro-flattened Raster DEM. Geographic Extent: Montgomery and Prince George's counties, Maryland, covering approximately 1073 square miles. Dataset Description: The lidar project called for the Planning, Acquisition, processing and derivative products of lidar data to be collected at a nominal pulse spacing (NPS) of 0.35 meters. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base Lidar Specification, 2023 revision A. The data was developed based on a horizontal projection/datum of NAD83 (HARN), State Plane, Feet and vertical datum of NAVD88 (GEOID12B), Feet. Lidar data was delivered as processed Classified LAS 1.4 files, formatted to 1374 individual 6000 ft x 4000 ft tiles clipped to the DPA, as tiled intensity images, and as tiled bare-earth DEMs; all tiled to the same 6000 ft x 4000 ft schema. Ground Conditions: Lidar was collected in December 2023, 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, Sanborn Map Company, Inc., established a total of 24 ground control points that were used to calibrate the lidar to known ground locations established throughout the project area. |
| licenseInfo:
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No restrictions apply to these data. However, users should be aware that temporal changes may have occurred since this dataset was collected and that some parts of these data may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of its limitations. Acknowledgement of the U.S. Geological Survey would be appreciated for products derived from these data. |
| catalogPath:
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| title:
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MD_princegeorges_shadedRelief_RGB |
| type:
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Image Service |
| url:
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https://gis-ags-lidar1p.mdgov.maryland.gov:6443/arcgis |
| tags:
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["MD iMAP"," MD"," Maryland"," Prince George\u2019s"," LiDAR"," Shaded"," Relief"," RGB"] |
| culture:
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en-US |
| name:
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MD_princegeorges_shadedRelief_RGB |
| guid:
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|
| minScale:
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1.8489297737236E7 |
| spatialReference:
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WGS_1984_Web_Mercator_Auxiliary_Sphere |