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Legal land descriptions for example political and administrative boundaries governmental units marine boundaries voting districts school districts  - Information from apps.usgs.gov

The USGS Thesaurus provides a controlled vocabulary of scientific concepts relevant to the mission and work of the USGS This controlled vocabulary helps to  - Information from apps.usgs.gov

The USGS Thesaurus provides a controlled vocabulary of scientific This infrastructure was specifically intended to help people outside USGS find  - Information from apps.usgs.gov

USGS Thesaurus Search Earth material > Plutonic rock Ultramafic intrusive rock A general name for plutonic rock with color index (M) greater than or  - Information from apps.usgs.gov

USGS Thesaurus Search Categories > methods > laboratory methods camera calibration Optical calibration of cameras that are typically used in airborne  - Information from apps.usgs.gov