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2019 NOAA Topobathy Lidar DEM (Voids): Morro Bay, CA

Metadata Updated: March 15, 2024

These data represent integrated lidar and sonar gridded surface data. Quantum Spatial, Inc. (QSI) collected the topobathymetric lidar using a Riegl VQ880GII system on May 22, 2019. Merkel and Associates collected sonar data to provide bathymetric surface modeling in areas lacking lidar coverage. The sonar was collected between June 17th-19th, 2019 using a SEA SWATHplus-H sonar system. QSI performed the lidar/sonar integration. The dataset includes topobathy data in a LAS 1.4 format file with the following classification:1-Unclassified, 1-O (Overlap bit) - Edge clip (geometrically unreliable points at the edge of flightline swaths), 2-Ground, 7-Noise, 9-NIR water surface, 20-Ignored ground and sonar (excluded for seamless model creation), 40-Bathymetric point, 41-Green laser water surface,and 45- Green laser water column in accordance with project specifications. Sonar data has been assigned a Point Source ID of 9 and a User Byte of 2. All other data is lidar-derived. The NOAA Morro Bay area of covers approximately 4,215 acres over Morro Bay, including the Morro Bay Estuary and roughly 3.6 miles of coastline. LAS files were compiled by 500 m x 500 m tiles.

An automated grounding classification algorithm was used to determine bare earth and submerged topography point classification. The automated grounding was followed with manual editing. Classes 2 (ground), and 40 (submerged topography) were used to create the final DEMs. The full workflow used for this project is documented in the NOAA Morro Bay final report.

Void DEM dataset- A void shapefile was created to indicate areas where there was a lack of bathymetric returns. This shape was created by triangulating bathymetric bottom points with an edge length maximum of 4.56m to identify all areas greater then 9 square meters without bathymetric returns. This shapefile was used to exclude interpolated elevation data from this dataset.

Access & Use Information

License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources


Metadata Date February 29, 2024
Metadata Created Date November 12, 2020
Metadata Updated Date March 15, 2024
Reference Date(s) October 10, 2019 (creation), (publication)
Frequency Of Update notPlanned

Metadata Source

Harvested from NOS OCM

Graphic Preview

This graphic displays the footprint for this lidar data set.

Additional Metadata

Resource Type Dataset
Metadata Date February 29, 2024
Metadata Created Date November 12, 2020
Metadata Updated Date March 15, 2024
Reference Date(s) October 10, 2019 (creation), (publication)
Responsible Party NOAA Office for Coastal Management (Point of Contact, Custodian)
Contact Email
Guid gov.noaa.nmfs.inport:57923
Access Constraints Cite As: Office for Coastal Management, [Date of Access]: 2019 NOAA Topobathy Lidar DEM (Voids): Morro Bay, CA [Data Date Range],, 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., 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
Bbox East Long -120.821145
Bbox North Lat 35.373531
Bbox South Lat 35.304796
Bbox West Long -120.875211
Coupled Resource
Frequency Of Update notPlanned
Graphic Preview Description This graphic displays the footprint for this lidar data set.
Graphic Preview File
Graphic Preview Type KML
Harvest Object Id 2af90aee-326d-4a5b-a018-8834310e5892
Harvest Source Id c0121fd9-df15-4168-ac04-42f6e36a794d
Harvest Source Title NOS OCM
Licence NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose.
Lineage Topobathy lidar and side scan sonar data were collected within the study area. These data were processed to produce a seamless data set.
Metadata Language eng
Metadata Type geospatial
Old Spatial {"type": "Polygon", "coordinates": [[[-120.875211, 35.304796], [-120.821145, 35.304796], [-120.821145, 35.373531], [-120.875211, 35.373531], [-120.875211, 35.304796]]]}
Progress completed
Spatial Data Service Type
Spatial Reference System EPSG::6318
Spatial Harvester True
Temporal Extent Begin 2019-05-22
Temporal Extent End 2019-06-19

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