ArcGIS Marine Data Model
http://dusk2.geo.orst.edu/.../arcgis/
NOAA NWS Hydrology XML Consortium Schema
http://www.hydroxc.org/
SEACOOS Table Schema
(CF, COARDS and others)
Semantic Web for Earth and Environmental Terminology
http://sweet.jpl.nasa.gov/ontology/
Digital Geospatial Metadata, Part 1: Biological Data Profile
http://www.fgdc.gov/standards/projects/FGDC-standards-projects/metadata/biometadata/index_html
Geospatial Positioning Accuracy Reporting Methodology
http://www.fgdc.gov/standards/projects/FGDC-standards-projects/accuracy/part1/index_html
National Standard for Spatial Data Accuracy
http://www.fgdc.gov/standards/projects/FGDC-standards-projects/accuracy/part3/index_html
NOAA CSC Observation Database Schema