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This is a Non-Federal dataset covered by different Terms of Use than

TRE ALTAMIRA InSAR Subsidence Data

Metadata Updated: March 30, 2024

This dataset represents measurements of vertical ground surface displacement in more than 200 of the high-use and populated groundwater basins across the State of California between January of 2015 and April of 2022. Vertical displacement estimates are derived from Interferometric Synthetic Aperture Radar (InSAR) data that are collected by the European Space Agency (ESA) Sentinel-1A satellite and processed by TRE ALTAMIRA Inc. (TRE), under contract with the California Department of Water Resources (DWR) as part of DWR’s SGMA technical assistance to provide important SGMA-relevant data to GSAs for GSP development and implementation. Sentinel-1A InSAR data coverage began in late 2014 for parts of California, and coverage for the entire study area began in June 13, 2015. Included in this dataset are point data that represent average vertical displacement values for 100 meter by 100 meter areas, as well as GIS rasters that were interpolated from the point data; rasters for total vertical displacement relative to June 13, 2015, and rasters for annual vertical displacement rates with earlier coverage for some areas, both in monthly time steps. Towill Inc. (Towill), also under contract with DWR as part of DWR’s SGMA technical assistance, conducted an independent study comparing the InSAR-based vertical displacement point time series data to data from Continuous Global Positioning System (CGPS) stations. The goal of this study was to ground-truth the InSAR results to best available independent data.

Data update frequency: Quarterly Report update frequency: Annual

Access & Use Information

Public: This dataset is intended for public access and use. Non-Federal: This dataset is covered by different Terms of Use than License: No license information was provided.

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Metadata Created Date August 12, 2023
Metadata Updated Date March 30, 2024

Metadata Source

Harvested from State of California

Additional Metadata

Resource Type Dataset
Metadata Created Date August 12, 2023
Metadata Updated Date March 30, 2024
Publisher California Department of Water Resources
Identifier e6d5d061-c859-4aad-9e5a-067ab20955fd
Data First Published 2019-05-02T06:03:09.188964
Data Last Modified 2024-03-14T17:56:30.291252
Category Natural Resources, Water
Public Access Level public
Metadata Context
Schema Version
Catalog Describedby
Harvest Object Id 90267fd5-9e02-4e6e-a435-41a96a8785cb
Harvest Source Id 3ba8a0c1-5dc2-4897-940f-81922d3cf8bc
Harvest Source Title State of California
Source Datajson Identifier True
Source Hash cb76f49e27d8c668d4187abb725f82706f307250eaaaf4edb62ac355b4cb7a3f
Source Schema Version 1.1

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