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Short Citation:
OCM Partners, 2023: 2006 U.S. Geological Survey Topographic LiDAR: Alameda County,

Item Identification

Title: 2006 U.S. Geological Survey Topographic LiDAR: Alameda County
Short Name: ca2006_usgs_alameda_m1474_metadata
Status: Completed
Publication Date: 2013-03

The Light Detection and Ranging (LiDAR) data set is a survey of Alameda County in Northern California. The entire survey covers approximately 868.382 square miles.

The Nominal Point Density of this dataset is approximately 1.66 meters for unobscured areas. The LiDAR discrete-return point cloud data were originally available in the

American Society for Photogrammetry and Remote Sensing (ASPRS) LAS V1.2 format.

The data classifications available from the NOAA Data Access Viewer (DAV) are:

1 - Unclassified

2 - Ground

7 - Low point (Noise)

10 - Overlap

Original contact information:

Contact Org: U.S. Geological Survey Earth Resources Observation and Science (EROS) Center

Title: Long Term Archive (LTA) Representative

Phone: Unknown



High-resolution digital elevation maps generated by airborne and stationary LiDAR have led to significant advances in geomorphology, the branch of

geoscience concerned with the origin and evolution of Earth's surface topography. LiDAR provides unique characteristics relative to other remotely sensed data sources

by providing three-dimensional feature information that cannot be derived from traditional imaging sensors.



Supplemental Information:

A footprint of this data set may be viewed in Google Earth at:


Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
None point cloud

Physical Location

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

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: As Needed
Data Presentation Form: las
Entity Attribute Overview:

LiDAR points in LAS 1.2 format

Entity Attribute Detail Citation:


Distribution Liability:

Any conclusions drawn from the analysis of this information are not the responsibility

of Sanborn, USGS, NOAA, the Office for Coastal Management or its partners.

Data Set Credit: U.S. Geological Survey

Support Roles

Data Steward

CC ID: 670791
Date Effective From: 2013-03
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address:
Phone: (843) 740-1202


CC ID: 670793
Date Effective From: 2013-03
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address:
Phone: (843) 740-1202

Metadata Contact

CC ID: 670794
Date Effective From: 2013-03
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address:
Phone: (843) 740-1202

Point of Contact

CC ID: 670792
Date Effective From: 2013-03
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address:
Phone: (843) 740-1202


Currentness Reference: Ground Condition

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 1133630
W° Bound: -122.361368
E° Bound: -121.463828
N° Bound: 37.9138
S° Bound: 37.445799

Extent Group 1 / Time Frame 1

CC ID: 1133629
Time Frame Type: Range
Start: 2006-06-25
End: 2006-07-02

Spatial Information

Spatial Representation

Representations Used

Vector: Yes

Access Information

Security Class: Unclassified
Data Access Procedure:

This data can be obtained on-line at the following URL:


Data Access Constraints:


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. These data

depict the heights at the time of the survey and are only accurate for that time.

Distribution Information

Distribution 1

CC ID: 740471
Download URL:
File Name: Customized Download

Create custom data files by choosing data area, product type, map projection, file format, datum, etc.

Distribution 2

CC ID: 740472
Download URL:
File Name: Bulk Download

Simple download of data files.



CC ID: 740474
URL Type:
Online Resource


CC ID: 740475
URL Type:
Online Resource


CC ID: 740476
Name: Browse Graphic
URL Type:
Browse Graphic
File Resource Format: kmz

This graphic shows the lidar coverage for Alameda County, California.

Activity Log

Activity Log 1

CC ID: 670809
Activity Date/Time: 2016-05-23

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 670808
Activity Date/Time: 2017-11-14

Converted from FGDC Content Standards for Digital Geospatial Metadata (version FGDC-STD-001-1998) using '' script. Contact Tyler Christensen (NOS) for details.

Activity Log 3

CC ID: 718179
Activity Date/Time: 2018-02-08

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 740473
Activity Date/Time: 2018-03-13

Partial upload to move data access links to Distribution Info.

Data Quality


The identification of features is provided by the distinct electromagnetic energy it emits,reflects, or otherwise transmits. This is called the spectral signature.

Other signatures such as tone (lightness or darkness), texture (surface roughness or smoothness), pattern,shadow, shape, and size are as important. Thus, through the

use of the thematic mapper sensor, such elements as water features, soils, and vegetation can be identified and distinguished from each other.

Vertical Positional Accuracy:

No information about the vertical accuracy was given with the original metadata. This value is assumed based on FEMA lidar specifications concerning vertical accuracy.; Quantitative Value: 0.30 meters, Test that produced the value: Accuracyz = RMSEz X 1.9600 at the 95% confidence level (meters).

Completeness Report:

The lidar collection has been acquired by the USGS through contracts, partnerships with other Federal, state, tribal, or regional agencies, from

direct purchases from private industry vendors, and through volunteer contributions from the science community. While USGS makes every effort to provide accurate and

complete information, USGS provides no warranty, expressed or implied, as to the accuracy, reliability or completeness of furnished lidar point clouds. Please note

that USGS does not control and cannot guarantee the relevance, timeliness, or accuracy of these outside materials.

Conceptual Consistency:

All data formatted by OCM validated using commercial GIS software to ensure proper formatting and loading.


Process Steps

Process Step 1

CC ID: 1133627

The NOAA Office for Coastal Management (OCM) received topographic files in LAS format. The files contained lidar

elevation and intensity measurements. The data were received in projected California State Plane Zone 0403 coordinates

and were vertically referenced to NAVD88. The vertical units of the data were feet. OCM performed the following processing

for data storage and Digital Coast provisioning purposes:

1. High Noise (bad elevations) were removed from tiles 29J and 30J. All elevations greater than 1000 feet were removed.

2. Horizontally the data was converted from projected California State Place Zone 0403 coordinates (feet) to geographic NAD83 coordinates (decimal degrees)

3. Vertically the data was converted from orthometric NAVD88 heights (feet) to ellipsoidal NAD83 (meters) using GEOID03 (assumed)

Process Date/Time: 2013-03-01 00:00:00

Catalog Details

Catalog Item ID: 49637
GUID: gov.noaa.nmfs.inport:49637
Metadata Record Created By: Anne Ball
Metadata Record Created: 2017-11-15 15:21+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2022-08-09 17:11+0000
Metadata Record Published: 2022-03-16
Owner Org: OCMP
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2022-03-16
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2023-03-16