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OCM Partners Metadata Library > Lidar - partner (no harvest) >

2020 Maryland Lidar: Anne Arundel County, MD

Data Set (DS)  |  OCM Partners (OCMP)
GUID: gov.noaa.nmfs.inport:75711  |  Updated: May 5, 2025  |  Published / External 
Summary
Item Identification
Keywords
Physical Location
Data Set Info
Support Roles
Extents
Spatial Info
Access Info
Distribution Info
URLs
Data Quality
Data Management
Lineage
Related Items
Catalog Details

Summary

Browse Graphic

Short Citation
OCM Partners, 2025: 2020 Maryland Lidar: Anne Arundel County, MD, https://www.fisheries.noaa.gov/inport/item/75711.
Full Citation Examples

Abstract

Original Product: These are the lidar point cloud data as part of the required deliverables for the lidar project.

Original Dataset Geographic Extent: Anne Arundel county, Maryland, covering approximately 459 square miles.

Original 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, Version 2.1. 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 619 individual 6000 ft x 4000 ft tiles, as tiled intensity rasters, and as tiled bare-earth DEMs; all tiled to the same 6000 ft x 4000 ft schema.

Original Dataset Ground Conditions: Lidar was collected in late 2020, 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., utilized a total of 10 ground control points that were used to calibrate the lidar to known ground locations established throughout the project area. An additional 50 independent accuracy check points, 30 in Bare Earth and Urban landcovers (30 NVA points), 20 in Tall Grass and Brushland/Low Trees categories (20 VVA points), were used to assess the vertical accuracy of the data. These check points were not used to calibrate or post process the data.

There was no point cloud metadata record available from iMAP, so this record, which supports the data entry in the NOAA Digital Coast Data Access Viewer (DAV), was created from the Digital Elevation Model (DEM) metadata that was provided on the Maryland iMAP site. The 2020 Anne Arundel County, Maryland lidar point cloud data were downloaded from the Maryland iMAP site and the data were processed to be made available for bulk and custom download from the DAV.

Purpose

To acquire 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. This allows the user to create Intensity Images, Breaklines and Raster DEM. The purpose of these lidar data was to produce high accuracy 3D hydro-flattened Digital Elevation Model (DEM) with a 1 foot cell size. These lidar point cloud data were used to create intensity images, 3D breaklines, and hydro-flattened DEMs as necessary.

Distribution Information

  • Customized Download
    Format: Not Applicable

    Create custom data files by choosing data area, product type, map projection, file format, datum, etc. A new metadata will be produced to reflect your request using this record as a base. Change to an orthometric vertical datum is one of the many options.

  • Bulk Download
    LAS/LAZ - LASer

    Bulk download of data files in LAZ format, geographic coordinates, orthometric heights. Note that the vertical datum (hence elevations) of the files here are different than described in this document. They will be in an orthometric datum.

Access Constraints:

None

Use Constraints:

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.

Controlled Theme Keywords

COASTAL ELEVATION, elevation, TERRAIN ELEVATION

URLs

  • NOAA's Office for Coastal Management (OCM) Data Access Viewer (DAV)

    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.

  • Custom DEM Download

    Link to custom download, from the Data Access Viewer (DAV), the raster Digital Elevation Model (DEM) data that were created from this lidar data set.

  • Entwine Point Tile (EPT)

    Entwine Point Tile (EPT) is a simple and flexible octree-based storage format for point cloud data. The data is organized in such a way that the data can be reasonably streamed over the internet, pulling only the points you need. EPT files can be queried to return a subset of the points that give you a representation of the area. As you zoom further in, you are requesting higher and higher densities. A dataset in EPT will contain a lot of files, however, the ept.json file describes all the rest. The EPT file can be used in Potree and QGIS to view the point cloud.

  • Potree 3D View

    Link to view the point cloud (using the Entwine Point Tile (EPT) format) in the 3D Potree viewer.

Child Items

No Child Items for this record.

Contact Information

Point of Contact
NOAA Office for Coastal Management (NOAA/OCM)
coastal.info@noaa.gov
(843) 740-1202
https://coast.noaa.gov

Metadata Contact
NOAA Office for Coastal Management (NOAA/OCM)
coastal.info@noaa.gov
(843) 740-1202
https://coast.noaa.gov

Extents

Geographic Area 1

-76.8406552171° W, -76.3931776623° E, 39.2381837° N, 38.7117806526° S

Time Frame 1
2020-12-08 - 2020-12-11

Item Identification

Title: 2020 Maryland Lidar: Anne Arundel County, MD
Status: Completed
Creation Date: 2020
Publication Date: 2021-06-24
Abstract:

Original Product: These are the lidar point cloud data as part of the required deliverables for the lidar project.

Original Dataset Geographic Extent: Anne Arundel county, Maryland, covering approximately 459 square miles.

Original 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, Version 2.1. 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 619 individual 6000 ft x 4000 ft tiles, as tiled intensity rasters, and as tiled bare-earth DEMs; all tiled to the same 6000 ft x 4000 ft schema.

Original Dataset Ground Conditions: Lidar was collected in late 2020, 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., utilized a total of 10 ground control points that were used to calibrate the lidar to known ground locations established throughout the project area. An additional 50 independent accuracy check points, 30 in Bare Earth and Urban landcovers (30 NVA points), 20 in Tall Grass and Brushland/Low Trees categories (20 VVA points), were used to assess the vertical accuracy of the data. These check points were not used to calibrate or post process the data.

There was no point cloud metadata record available from iMAP, so this record, which supports the data entry in the NOAA Digital Coast Data Access Viewer (DAV), was created from the Digital Elevation Model (DEM) metadata that was provided on the Maryland iMAP site. The 2020 Anne Arundel County, Maryland lidar point cloud data were downloaded from the Maryland iMAP site and the data were processed to be made available for bulk and custom download from the DAV.

Purpose:

To acquire 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. This allows the user to create Intensity Images, Breaklines and Raster DEM. The purpose of these lidar data was to produce high accuracy 3D hydro-flattened Digital Elevation Model (DEM) with a 1 foot cell size. These lidar point cloud data were used to create intensity images, 3D breaklines, and hydro-flattened DEMs as necessary.

Keywords

Theme Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > OCEANS > COASTAL PROCESSES > COASTAL ELEVATION
ISO 19115 Topic Category
elevation

Spatial Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA
Global Change Master Directory (GCMD) Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > MARYLAND
Global Change Master Directory (GCMD) Location Keywords
VERTICAL LOCATION > LAND SURFACE

Instrument Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Instrument Keywords
LIDAR > Light Detection and Ranging

Platform Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Platform Keywords
Airplane > Airplane

Physical Location

Organization: Office for Coastal Management
City: Charleston
State/Province: SC

Data Set Information

Data Set Scope Code: Data Set
Data Set Type: Elevation
Maintenance Frequency: None Planned
Data Presentation Form: Model (digital)
Distribution Liability:

Any conclusions drawn from the analysis of this information are not the responsibility of NOAA, the Office for Coastal Management or its partners.
Data Set Credit: Sanborn Map Company, Inc., MD iMAP

Support Roles

Data Steward

CC ID: 1383055
Date Effective From: 2025
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Distributor

CC ID: 1383054
Date Effective From: 2025
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Metadata Contact

CC ID: 1383056
Date Effective From: 2025
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Point of Contact

CC ID: 1383057
Date Effective From: 2025
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Extents

Currentness Reference: Ground Condition

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 1383071
W° Bound: -76.8406552171
E° Bound: -76.3931776623
N° Bound: 39.2381837
S° Bound: 38.7117806526

Extent Group 1 / Time Frame 1

CC ID: 1383070
Time Frame Type: Range
Start: 2020-12-08
End: 2020-12-11

Spatial Information

Spatial Representation

Representations Used

Grid: No
Vector: Yes
Text / Table: No
TIN: No
Stereo Model: No
Video: No

Reference Systems

Reference System 1

CC ID: 1383081

Coordinate Reference System
CRS Type: Geographic 3D
EPSG Code: EPSG:6319
EPSG Name: NAD83(2011)
▾ See Full Coordinate Reference System Information

Access Information

Security Class: Unclassified
Data Access Procedure:

Data is available online for bulk and custom downloads.
Data Access Constraints:

None
Data Use Constraints:

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.

Distribution Information

Distribution 1

CC ID: 1383058
Start Date: 2025
End Date: Present
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=10311/details/10311
Distributor: NOAA Office for Coastal Management (NOAA/OCM) (2025 - Present)
File Name: Customized Download
Description:

Create custom data files by choosing data area, product type, map projection, file format, datum, etc. A new metadata will be produced to reflect your request using this record as a base. Change to an orthometric vertical datum is one of the many options.
Distribution Format: Not Applicable
Compression: Zip

Distribution 2

CC ID: 1383059
Start Date: 2025
End Date: Present
Download URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/10311/index.html
Distributor: NOAA Office for Coastal Management (NOAA/OCM) (2025 - Present)
File Name: Bulk Download
Description:

Bulk download of data files in LAZ format, geographic coordinates, orthometric heights. Note that the vertical datum (hence elevations) of the files here are different than described in this document. They will be in an orthometric datum.
Distribution Format: LAS/LAZ - LASer
Compression: LAZ

URLs

URL 1

CC ID: 1383060
URL: https://coast.noaa.gov/dataviewer/
Name: NOAA's Office for Coastal Management (OCM) Data Access Viewer (DAV)
URL Type:
Online Resource
File Resource Format: HTML
Description:

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.

URL 2

CC ID: 1383082
URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=10308/details/10308
Name: Custom DEM Download
URL Type:
Online Resource
File Resource Format: Zip
Description:

Link to custom download, from the Data Access Viewer (DAV), the raster Digital Elevation Model (DEM) data that were created from this lidar data set.

URL 3

CC ID: 1383083
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/10311/supplemental/md2020_arundel_m10311.kmz
Name: Browse Graphic
URL Type:
Browse Graphic
File Resource Format: kmz
Description:

This graphic shows the coverage for the 2020 lidar acquisition for Anne Arundel County, Maryland.

URL 4

CC ID: 1383084
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/entwine/geoid18/10311/ept.json
Name: Entwine Point Tile (EPT)
URL Type:
Online Resource
File Resource Format: json
Description:

Entwine Point Tile (EPT) is a simple and flexible octree-based storage format for point cloud data. The data is organized in such a way that the data can be reasonably streamed over the internet, pulling only the points you need. EPT files can be queried to return a subset of the points that give you a representation of the area. As you zoom further in, you are requesting higher and higher densities. A dataset in EPT will contain a lot of files, however, the ept.json file describes all the rest. The EPT file can be used in Potree and QGIS to view the point cloud.

URL 5

CC ID: 1383085
URL: https://coast.noaa.gov/lidar/viewer/v/noaapotree.html?r=https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/entwine/geoid18/10311/ept.json
Name: Potree 3D View
URL Type:
Online Resource
Description:

Link to view the point cloud (using the Entwine Point Tile (EPT) format) in the 3D Potree viewer.

Data Quality

Vertical Positional Accuracy:

This data set was produced to meet ASPRS Positional Accuracy Standard for Digital Geospatial Data (2014) for a 10-cm RMSEz Vertical Accuracy Class.
Completeness Report:

Datasets contain complete coverage of tiles. No points have been removed or excluded. A visual qualitative assessment was performed to ensure data completeness. There are no void areas or missing data. The raw point cloud is of good quality and data passes Non-Vegetated Vertical Accuracy specifications.
Conceptual Consistency:

Data covers the pilot area specified for this project.

Data Management

Have Resources for Management of these Data Been Identified?: Yes
Approximate Percentage of Budget for these Data Devoted to Data Management: Unknown
Do these Data Comply with the Data Access Directive?: Yes
Actual or Planned Long-Term Data Archive Location: NCEI-NC
How Will the Data Be Protected from Accidental or Malicious Modification or Deletion Prior to Receipt by the Archive?:

Data is backed up to cloud storage.

Lineage

Lineage Statement:

Data were collected for the state of Maryland by Sanborn. The data were downloaded by the NOAA Office for Coastal Management (OCM) from the MD iMAP site and processed to make it available for custom download from the NOAA Digital Coast Data Access Viewer (DAV) and for bulk download from S3 AWS.

Sources

MD iMAP Files

CC ID: 1383066
Contact Role Type: Publisher
Contact Type: Organization
Contact Name: MD iMAP
Citation URL: https://doitdataservices.maryland.gov/s/N9xGBYPKq4QSZNq?path=%2FAnne%20Arundel%20County%2F2020%2FLAZ
Citation URL Name: MD iMAP - Anne Arundel County Lidar Point Cloud Data

Process Steps

Process Step 1

CC ID: 1383067
Description:

Because there was no metadata record for the lidar point data, the following information was taken from the Abstract of the Digital Elevation Model (DEM) metadata that was downloaded from the Maryland iMAP site.

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, Version 2.1. 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 619 individual 6000 ft x 4000 ft tiles, as tiled intensity rasters, and as tiled bare-earth DEMs; all tiled to the same 6000 ft x 4000 ft schema.

Lidar was collected in late 2020, 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., utilized a total of 10 ground control points that were used to calibrate the lidar to known ground locations established throughout the project area. An additional 50 independent accuracy check points, 30 in Bare Earth and Urban landcovers (30 NVA points), 20 in Tall Grass and Brushland/Low Trees categories (20 VVA points), were used to assess the vertical accuracy of the data. These check points were not used to calibrate or post process the data.
Process Date/Time: 2021-06-24 00:00:00

Process Step 2

CC ID: 1383068
Description:

The NOAA Office for Coastal Management (OCM) downloaded LAZ data files from this MD iMAP site:

https://doitdataservices.maryland.gov/s/N9xGBYPKq4QSZNq?path=%2FAnne%20Arundel%20County%2F2020%2FLAZ

The data were in MD State Plane (NAD83 HARN), US feet coordinates and NAVD88 (Geoid12B) elevations in feet.

The data were classified as: 1 - Unclassified, 2 - Ground, 3- Low Vegetation, 4 - Medium Vegetation, 5 - High Vegetation, 6 - Buildings, 7 - Low Noise, 9 - Water, 17 - Bridge Decks, 18 - High Noise, 20 - Ignored Ground. OCM processed all classifications of points to the Digital Coast Data Access Viewer (DAV). Classes available on the DAV are: 1, 2, 3, 4, 5, 6, 7, 9, 17, 18, 20.

OCM performed the following processing on the data for Digital Coast storage and provisioning purposes:

1. Internal OCM scripts were run to check the number of points by classification and by flight ID and the gps, elevation, and intensity ranges.

2. Internal OCM scripts were run on the laz files to:

a. Convert from orthometric (NAVD88) elevations to NAD83 (2011) ellipsoid elevations using the Geoid12B model

b. Convert from Maryland State Plane (NAD83 2011), meters coordinates to geographic coordinates

c. Convert from elevation values in feet to elevation values in meters

d. Assign the geokeys, sort the data by gps time and zip the data to database and to AWS S3
Process Date/Time: 2025-03-25 00:00:00
Process Contact: Office for Coastal Management (OCM)

Related Items

Item Type Relationship Type Title
Data Set (DS) Cross Reference 2020 Maryland Lidar DEM: Anne Arundel County, MD

Catalog Details

Catalog Item ID: 75711
GUID: gov.noaa.nmfs.inport:75711
Metadata Record Created By: Rebecca Mataosky
Metadata Record Created: 2025-05-05 15:44+0000
Metadata Record Last Modified By: Rebecca Mataosky
Metadata Record Last Modified: 2025-05-05 17:37+0000
Metadata Record Published: 2025-05-05
Owner Org: OCMP
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2025-03-26
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2026-03-26