52243 2011 Howard Maryland Data Set Published / External 49401 Lidar - partner (no harvest) Project Completed Howard County, MD contracted to collect detailed ground elevation data from Aerial LiDAR Sensors for approximately 256 Square Miles as part of the CATSII, 2011 Maryland Statewide Orthophoto Project. The LiDAR data was collected in accordance with FEMA Procedure Memorandum No. 61 - Standards for LiDAR and Other High Quality Digital Topography, for which LiDAR data is collected in accordance with the USGS LiDAR Guidelines and Base Specifications, v13, dated February 22, 2010, for the National Geospatial Program, except as noted in FEMA's Procedure Memorandum No. 61. To acquire detailed surface elevation data for use in conservation planning, design, research, floodplain mapping, dam safety assessments, and hydrologic modeling. LAS and bare earth DEM data products are suitable for 2 foot contour generation. LiDAR points in LAS 1.2 format Theme Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION Theme Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > OCEANS > COASTAL PROCESSES > COASTAL ELEVATION Theme ISO 19115 Topic Category elevation Spatial Global Change Master Directory (GCMD) Location Keywords CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > MARYLAND Spatial Global Change Master Directory (GCMD) Location Keywords VERTICAL LOCATION > LAND SURFACE Instrument Global Change Master Directory (GCMD) Instrument Keywords LIDAR > Light Detection and Ranging Platform Global Change Master Directory (GCMD) Platform Keywords Airplane > Airplane Theme erosion Office for Coastal Management Charleston SC Data Set Elevation Unknown raster digital data Point classifications: 1 = unclassified 2 = ground 7 = low noise 9 = water 11 = withheld 12 = overlap Any conclusions drawn from the analysis of this information are not the responsibility of NOAA, the Office for Coastal Management or its partners Created by Surdex through Contract with USACE St Louis, Surdex Corporation Data Steward 2018 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Distributor 2018 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Metadata Contact 2018 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Point of Contact 2018 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Ground Condition -77.1877 -76.695 39.3698 39.1023 Range 2011-03-27 2011-03-28 Flight dates for lidar acquisition 1.4 Meter The nominal point spacing was 1.4 meters. The points are irregularly spaced. Yes Unclassified Data is available online for custom downloads None Users should be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations. https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=8495 Customized Download Create custom data files by choosing data area, product type, map projection, file format, datum, etc. Zip https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/8495/index.html Bulk Download Bulk download of data files in LAZ format, geographic coordinates, orthometric heights. LAZ LAS/LAZ - LASer Zip https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/8495/supplemental/2011_Howard_area.kmz Browse graphic Browse Graphic KML This graphic displays the footprint for this lidar data set. http://imap.maryland.gov/Pages/lidar.aspx Original data site Online Resource Link to the original source of data. https://coast.noaa.gov/ NOAA's Office for Coastal Management (OCM) website Online Resource HTML Information on the NOAA Office for Coastal Management (OCM) https://coast.noaa.gov/dataviewer/ NOAA's Office for Coastal Management (OCM) Data Access Viewer (DAV) Online Resource HTML The Data Access Viewer (DAV) allows a user to search for and download elevation, imagery, and land cover data for the coastal U.S. and its territories. The data, hosted by the NOAA Office for Coastal Management, can be customized and requested for free download through a checkout interface. An email provides a link to the customized data, while the original data set is available through a link within the viewer. Microsoft Windows Vista Version 6.1 (Build 7600) ; ESRI ArcCatalog 9.3.1.4000 Flown to meet a specification of 18.5 cm RMSEz 1 Acquisition with ALS50 at 2500 meters AGL, 34 deg FOV, 96,800 pulse rate, 39.8 Hz, 20.85% sidelap, 1.4 meter NPS. All flights have calibration lines flown at beginning and end of flight over GPS basestation at local airport. 2 basestations are run at all times and placed so flight baseline never exceeds 25 miles. The bare-earth Lidar data was processed using FEMA Procedure Memorandum No. 61 & USGS (NGP) Base Lidar Specifications V13. Vertical Accuracy of the LiDAR data was assessed and reported in accordance with National Digital Elevation Program (NDEP)/American Society for Photogrammetry and Remote Sensing (ASPRS) guidelines for fundamental vertical accuracy (FVA) <=36.3cm ACCz, 95% (18.5cm RMSEz), supplemental vertical accuracy (SVA) <=36.5 cm, 95th Percentile, and consolidated vertical accuracy (CVA) <=36.3cm 95th Percentile. 2 LiDAR lines processed to ground and manually cleaned and reviewed in TerraScan; DEM products produced in TerraScan 3 Data were obtained from the Maryland iMAP (imap.maryland.gov) in October 2017. Data were processed to reproject from Maryland State Plane in feet to geographic coordinates. Vertical coordinates were transformed from NAVD88 feet to NAD83 ellipsoid heights in meters using the GEOID09 model. Data were then ingested into the Digital Coast Data Access Viewer for distribution. Organization Office for Coastal Management OCM https://ror.org/05v14bq57 2234 South Hobson Avenue Charleston SC 29405-2413 https://www.coast.noaa.gov/ gov.noaa.nmfs.inport:52243 Kirk Waters 2018-03-23T09:20:13 SysAdmin InPortAdmin 2026-03-04T19:17:17 2022-03-16 OCM Partners OCMP 1002 Public No No 2022-03-16 1 Year 2023-03-16