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Aeromagnetic Data of Portola, California, and Surrounding Areas

Metadata Updated: July 6, 2024

This data release provides access to an aeromagnetic survey over a part of northern California, an area that includes the cities of Portola, California, and Reno, Nevada. The survey extends across the northern part of the Sierra Nevada from Honey Lake in the north to Lake Tahoe in the south and over parts of the Sierra Nevada foothills. These data were acquired between March 3 and May 3, 2021, by EDCON-PRJ, Inc., working under contract to the U.S. Geological Survey. The nominal flying height was based on a best fit, pre-planned, three-dimensional draped surface targeted at 305 m above terrain, subject to aircraft climb and descent limitations. Steep terrain in parts of the survey area required significant departures locally from the pre-planned drape surface (as much as 1207 m), and therefore variable terrain clearance should be considered when modeling and interpreting these data. Flight lines were spaced 800 m apart and directed N88E; tie lines were spaced 8000 m apart and directed N178E. A total of 23,298 line-kilometers were acquired over an area of approximately 16,675 square kilometers. The details of the Portola aeromagnetic survey are described in the document Portola_Tech_Report_508.pdf available for download in this data release. This report was prepared by EDCON-PRJ, Inc., and has not been edited.

Access & Use Information

Public: This dataset is intended for public access and use. 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.

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Metadata Created Date June 1, 2023
Metadata Updated Date July 6, 2024

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date July 6, 2024
Publisher U.S. Geological Survey
Identifier USGS:6290207ed34ef70cdba41a62
Data Last Modified 20220809
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id 5fb3b9dc-f704-4fcc-a3bd-a1cdb4823afb
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -121.241,38.9614,-119.6363,40.489
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash e7cccf3a7aba9763647b7a2e7168ef22ac6607ab9dd33d28310d3957ab8f780f
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -121.241, 38.9614, -121.241, 40.489, -119.6363, 40.489, -119.6363, 38.9614, -121.241, 38.9614}

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