### Question
How is the "hydrographic data" defined?


### Answer
The term **hydrographic data** is defined in *33 U.S.C. § 892* as follows -

> information acquired through hydrographic or bathymetric surveying, photogrammetry, geodetic measurements, tide and current observations, or other methods, that is used in providing hydrographic services

#### Citation:
  - *33 U.S.C. § 892*
  - Heading: **CHAPTER 17-NATIONAL OCEAN SURVEY > SUBCHAPTER IV-NOAA HYDROGRAPHIC SERVICES**

