Data · dataset · 2026
Submersed Aquatic Vegetation community multi-year data from the Sacramento - San Joaquin Delta in California
Listed in California Open Data
Since 2007, field data have been collected in the Sacramento - San Joaquin Delta in northern California for the purpose of training and validating invasive species maps derived from remote sensing imagery over the Delta.
Description
The field crew collected submersed aquatic vegetation (SAV) species location data. For each point they noted attributes such as species name(s), location, cover estimates, and patch size.
In addition, a thatching rake tethered to a rope was thrown off the side of the boat and pulled back out of the water; Secchi depth was measured using a Secchi disk and depth to the SAV mat was estimated by the field crew. Points were collected in patches larger than 9 square meters (3 m x 3 m). Point locations were measured using high precision (sub-meter accuracy) Trimble DGPS units (Trimble Navigation Limited, Sunnyvale, California) with Wide Area Augmentation System (WAAS) differential correction.
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All data points were exported as ArcGIS shapefiles and projected to UTM Zone 10N, Datum WGS-84 however this dataset includes the Latitude and Longitude of each point in decimal degrees. The spatial and attribute data quality was checked by examining photos of the data points and confirming the identify of the documented species. ## About This Federated Record This CNRA Open Data Platform record is based on metadata federated from the Environmental Data Initiative (EDI) Data Portal.
Its purpose is to improve the discoverability of the data package through the CNRA Open Data Platform. The EDI Data Portal is the repository of record for this data package. Metadata, resource links, and supporting information displayed here may not reflect the latest updates available in EDI.
Resources shown here—including Full Metadata, Provenance, and Data Quality Report—are provided to help users understand and evaluate the data package and the supporting information available from EDI. For the current data package, citation, DOI, data files, metadata, provenance, data quality documentation, revision history, and other supporting information, refer to the EDI data package landing page: portal.edirepository.org/nis/metadataviewer?packageid=edi.1143.2&key=vqSpNwnbe91Bi8trB5RY25CoPD4 Access requirements, permissions, and authorization policies for resources hosted by EDI are established and managed independently of the CNRA Open Data Platform.
Links
Get the data
- Publisher page portal.edirepository.org/nis/metadataviewer?packageid=edi.1143.2&key=vqSpNwnbe91Bi8trB5… ↗
documentation · download · from data ca gov
- Visible_Data_on_SAV pasta.lternet.edu/package/data/eml/edi/1143/2/07cd2d5fe4cbec8f55999311907c484e ↗
download · from data ca gov
- Rake_Data_on_SAV_QAQC pasta.lternet.edu/package/data/eml/edi/1143/2/fdda344ba12d9a57ad614a9cfd7ce569 ↗
download · from data ca gov
- Provenance Metadata portal.edirepository.org/nis/provenanceGenerator?packageid=edi.1143.2&key=vqSpNwnbe91Bi… ↗
download · from data ca gov
- Dataset Quality Report portal.edirepository.org/nis/reportviewer?packageid=edi.1143.2&key=vqSpNwnbe91Bi8trB5RY… ↗
download · from data ca gov
Where it is published
- California Open Data dataset page data.ca.gov/dataset/submersed-aquatic-vegetation-community-multi-year-data… ↗
landing page · from data ca gov
Catalogue records · 1
- CKAN API data.ca.gov/api/3/action/package_show?id=6c01d403-b314-4d1c-b59c-ab5cdfdb4… ↗
metadata API · from data ca gov
Topics
- Stated by source
- Natural Resources
- From keywords
- Life Sciences
- Inferred from text
- Ecology 74% · Satellite remote sensing 65%
Provenance · 1 source records, 11 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| California Open Data | 6c01d403-b314-4d1c-b59c-ab5cdfdb4c2c | 13 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · data ca gov | connector:data_ca_gov@1.0.0 | |
| concepts[field].anzsrc:group:3103 | enrichment · data ca gov | taxonomy-embedding@1.1.0 | title+keywords+description (74%) |
| concepts[field].local:field:life-sciences | mapping · data ca gov | connector:data_ca_gov@1.0.0 | |
| concepts[modality].local:modality:remote-sensing | enrichment · data ca gov | keyword-concept-rules@1.0.0 | title+description (65%) |
| concepts[topic].ckan_group:data_ca_gov:natural-resources | source · data ca gov | connector:data_ca_gov@1.0.0 | |
| created_date | source · data ca gov | connector:data_ca_gov@1.0.0 | |
| description | source · data ca gov | connector:data_ca_gov@1.0.0 | /notes |
| license_text | source · data ca gov | connector:data_ca_gov@1.0.0 | |
| publication_date | source · data ca gov | connector:data_ca_gov@1.0.0 | |
| title | source · data ca gov | connector:data_ca_gov@1.0.0 | /title |
| updated_date | source · data ca gov | connector:data_ca_gov@1.0.0 |