Lat/Long Coordinate Accuracy
| Gw Ref Cd | Gw Ref Ds |
|---|---|
| H | Accurate to + or - .01 sec (Differentially-Corrected GPS). |
| 1 | Accurate to + or - .1 sec (Differentially-Corrected GPS). |
| 5 | Accurate to + or - .5 sec (PLGR/PPS GPS). |
| M | Accurate to + or - 1 min. |
| S | Accurate to + or - 1 sec. |
| T | Accurate to + or - 10 sec. |
| R | Accurate to + or - 3 sec (SPS GPS). |
| F | Accurate to + or - 5 sec. |
| B | Level 1 survey-grade GPS |
| C | Level 2 survey-grade GPS |
| D | Level 3 survey-grade GPS |
| E | Level 4 survey-grade GPS |
| U | Unknown or unspecified. |
