Layer: Gravity Base Stations
This layer contains information on the location, type, and observed gravity values at gravity base stations in Washington State. Base station data and related diagrams were obtained from the Pan American Center for Earth & Environmental Studies (PACES) gravity database. Additional information for some base stations is available by following the URL found in the popup table revealed by using the Identify tool on a Gravity Base Station point in this viewer, and also in the attribute table included in the feature's download package. That information is derived from a base station database maintained by the National Geospatial-Intelligence Agency (NGA).