Measurements of the gravitational field vary slightly from place to place due to the composition and structure of Earth's crust. These digital grids describe the isostatic residual and Bouguer anomaly for the conterminous US.
Show in a web browser window:
Show in Google Earth or other KML viewer:
Gravity_Anomaly.kmz (compressed (includes both Bouguer and isostatic anomaly) 1k bytes)
Show in your GIS using OGC web services:
https://mrdata.usgs.gov/services/gravity (WMS, version 1.3.0)
Data packages:
| Name | Anomaly | Format | Size |
|---|---|---|---|
| isograv_sdd.e00.gz | Isostatic | ArcInfo interchange GRID | 3.5 MB |
| USgrv_iso_SDD_geog.tif | Isostatic | GeoTiff (Geographic, NAD83) | 3.0 MB |
| isograv.gxf.gz | Isostatic | Grid Exchange Format (Geographic, NAD27), gzipped | 3.1 MB |
| isograv.xyz.gz | Isostatic | XYZ text (Geographic, NAD27), gzipped | 6.1 MB |
| bouguer_sdd.e00.gz | Bouguer | ArcInfo interchange GRID | 3.4 MB |
| USgrv_cba_SDD_geog.tif | Bouguer | GeoTiff (Geographic, NAD83) | 11.4 MB |
| bouguer.gxf.gz | Bouguer | Grid Exchange Format (Geographic, NAD27), gzipped | 753 kB |
| bouguer.xyz.gz | Bouguer | XYZ text (Geographic, NAD27), gzipped | 5.8 MB |
| US_bouguer.zip | Bouguer | Geosoft grid | 1 MB |
Metadata:
| Anomaly | HTML | FAQ | TXT | XML |
|---|---|---|---|---|
| Bouguer | Outline | Questions & Answers | Plain text | XML |
| Isostatic | Outline | Questions & Answers | Plain text | XML |
