California Geological Survey (CGS) Datasets

Cloud Optimized versions of Geologic, geophysical, and neotectonic data products published by the California Geological Survey (CGS), often co-produced with the U.S. Geological Survey. Each child collection corresponds to a published Geologic Data Map (GDM) series volume.

Product Details

Visibility: Public
Owner: Carl Boettiger
Created: 16 Jun 2026
Last Updated: 16 Jun 2026

Product Contents

root

Product Details

Product Contents

California Geological Survey (CGS) Datasets

Product Details

Visibility: Public
Owner: Carl Boettiger
Created: 16 Jun 2026
Last Updated: 16 Jun 2026

Product Contents

root

README

California Geological Survey Datasets

Cloud-optimized publication of California Geological Survey (CGS) Geologic Data Map (GDM) series products, hosted on the NRP Nautilus S3 bucket public-cgs.

Public URL: https://s3-west.nrp-nautilus.io/public-cgs/

Available collections

Sierra Nevada Earth Science Atlas (GDM 009) — collaborative CGS/USGS geologic mapping of California's Sierra Nevada. Currently includes the geologic unit polygon layer; remaining layers (faults, landslides, neotectonics, geophysical anomalies, geochronology, mineralization) tracked in data-workflows#149.

Sierra Nevada Earth Science Atlas — Map Unit Polygons

Geologic-unit polygons for the Sierra Nevada region. 6,221 features across 268 distinct map units, derived from the MapUnitPolys feature class of the source File Geodatabase. Reprojected from NAD83 / California Albers (EPSG:3310) to WGS84 (EPSG:4326).

Assets

Asset	URL
GeoParquet	https://s3-west.nrp-nautilus.io/public-cgs/sierra-nevada-atlas/map-unit-polys.parquet
PMTiles	https://s3-west.nrp-nautilus.io/public-cgs/sierra-nevada-atlas/map-unit-polys.pmtiles
H3 hex (res 10)	`https://s3-west.nrp-nautilus.io/public-cgs/sierra-nevada-atlas/map-unit-polys/hex/h0=*/data_0.parquet`
Map-unit descriptions	https://s3-west.nrp-nautilus.io/public-cgs/sierra-nevada-atlas/description-of-map-units.parquet

DuckDB example

MapLibre GL JS example

PMTiles source-layer is map-unit-polys (last segment of --dataset).

Source

Producer: California Geological Survey + U.S. Geological Survey
Original release: GDM_009-SNESA-Data.zip, 2026 (v1 data; companion report expected late 2026)
Source URL: https://www.conservation.ca.gov/cgs/sierra-nevada-atlas
License: Public domain (state/federal coproduction)

Citation

California Geological Survey and U.S. Geological Survey (2026). Sierra Nevada Earth Science Atlas, v1. Geologic Data Map No. 9. California Geological Survey, Sacramento, CA. https://www.conservation.ca.gov/cgs/sierra-nevada-atlas

README

California Geological Survey Datasets

Cloud-optimized publication of California Geological Survey (CGS) Geologic Data Map (GDM) series products, hosted on the NRP Nautilus S3 bucket public-cgs.

Public URL: https://s3-west.nrp-nautilus.io/public-cgs/

Available collections

Sierra Nevada Earth Science Atlas (GDM 009) — collaborative CGS/USGS geologic mapping of California's Sierra Nevada. Currently includes the geologic unit polygon layer; remaining layers (faults, landslides, neotectonics, geophysical anomalies, geochronology, mineralization) tracked in data-workflows#149.

Sierra Nevada Earth Science Atlas — Map Unit Polygons

Assets

Asset	URL
GeoParquet	https://s3-west.nrp-nautilus.io/public-cgs/sierra-nevada-atlas/map-unit-polys.parquet
PMTiles	https://s3-west.nrp-nautilus.io/public-cgs/sierra-nevada-atlas/map-unit-polys.pmtiles
H3 hex (res 10)	`https://s3-west.nrp-nautilus.io/public-cgs/sierra-nevada-atlas/map-unit-polys/hex/h0=*/data_0.parquet`
Map-unit descriptions	https://s3-west.nrp-nautilus.io/public-cgs/sierra-nevada-atlas/description-of-map-units.parquet

DuckDB example

MapLibre GL JS example

PMTiles source-layer is map-unit-polys (last segment of --dataset).

Source

Producer: California Geological Survey + U.S. Geological Survey
Original release: GDM_009-SNESA-Data.zip, 2026 (v1 data; companion report expected late 2026)
Source URL: https://www.conservation.ca.gov/cgs/sierra-nevada-atlas
License: Public domain (state/federal coproduction)

Citation

California Geological Survey and U.S. Geological Survey (2026). Sierra Nevada Earth Science Atlas, v1. Geologic Data Map No. 9. California Geological Survey, Sacramento, CA. https://www.conservation.ca.gov/cgs/sierra-nevada-atlas

1INSTALL spatial; LOAD spatial;
2INSTALL httpfs; LOAD httpfs;
3
4-- Geologic units with full names, ages, and standardized rock classes
5SELECT
6  p.MapUnit,
7  d.Name,
8  d.Age,
9  d.GeoMaterial,
10  COUNT(*)         AS n_polygons,
11  SUM(p.Shape_Area) AS area_m2
12FROM read_parquet('https://s3-west.nrp-nautilus.io/public-cgs/sierra-nevada-atlas/map-unit-polys.parquet') p
13LEFT JOIN read_parquet('https://s3-west.nrp-nautilus.io/public-cgs/sierra-nevada-atlas/description-of-map-units.parquet') d
14  USING (MapUnit)
15GROUP BY p.MapUnit, d.Name, d.Age, d.GeoMaterial
16ORDER BY area_m2 DESC
17LIMIT 10;

1INSTALL spatial; LOAD spatial;
2INSTALL httpfs; LOAD httpfs;
3
4-- Geologic units with full names, ages, and standardized rock classes
5SELECT
6  p.MapUnit,
7  d.Name,
8  d.Age,
9  d.GeoMaterial,
10  COUNT(*)         AS n_polygons,
11  SUM(p.Shape_Area) AS area_m2
12FROM read_parquet('https://s3-west.nrp-nautilus.io/public-cgs/sierra-nevada-atlas/map-unit-polys.parquet') p
13LEFT JOIN read_parquet('https://s3-west.nrp-nautilus.io/public-cgs/sierra-nevada-atlas/description-of-map-units.parquet') d
14  USING (MapUnit)
15GROUP BY p.MapUnit, d.Name, d.Age, d.GeoMaterial
16ORDER BY area_m2 DESC
17LIMIT 10;

1map.addSource('snesa-units', {
2  type: 'vector',
3  url: 'pmtiles://https://s3-west.nrp-nautilus.io/public-cgs/sierra-nevada-atlas/map-unit-polys.pmtiles'
4});
5map.addLayer({
6  id: 'snesa-units-fill',
7  source: 'snesa-units',
8  'source-layer': 'map-unit-polys',
9  type: 'fill',
10  paint: {
11    'fill-color': ['match', ['get', 'MapUnit'],
12      'water', '#3b82f6',
13      'gl', '#cbd5e1',
14      'aft', '#a16207',
15      /* default */ '#9ca3af'
16    ],
17    'fill-opacity': 0.7,
18    'fill-outline-color': '#1f2937'
19  }
20});

1map.addSource('snesa-units', {
2  type: 'vector',
3  url: 'pmtiles://https://s3-west.nrp-nautilus.io/public-cgs/sierra-nevada-atlas/map-unit-polys.pmtiles'
4});
5map.addLayer({
6  id: 'snesa-units-fill',
7  source: 'snesa-units',
8  'source-layer': 'map-unit-polys',
9  type: 'fill',
10  paint: {
11    'fill-color': ['match', ['get', 'MapUnit'],
12      'water', '#3b82f6',
13      'gl', '#cbd5e1',
14      'aft', '#a16207',
15      /* default */ '#9ca3af'
16    ],
17    'fill-opacity': 0.7,
18    'fill-outline-color': '#1f2937'
19  }
20});