mrdata
              Airborne measurement of the earth's magnetic field over all of North America provides gridded data describing the magnetic anomaly caused by variations in earth materials and structure.
            
          | Parameter | Type | Description | Example | |
|---|---|---|---|---|
| flown by | string | Company or organization that performed the survey | Applied Geophysics, Inc. | |
| name | string | Descriptive name of the survey | Pensacola '77 | |
| Unique | survey | string | Shortname of the survey | FL_3105C | 
| type | string | The type of survey | M-D | 
| Required | The parameter is required when adding a dataset with this schema. Learn more. | 
| Unique | Two datasets cannot share this parameter. Read the docs on unique contraints to learn more |