The data are maintained as a arc/Info vector coverage in the Regions format. The Arc/Info regions subclass is called FIRES. The FIRES subclass contains data including name, acres, cause, agency, year, month, and day.
| FIREP.PATFIRES: |
| ITEM NAME | INPUT WIDTH | OUTPUT WIDTH | DATA TYPE | DECI MALS | DESCRIPTION |
| ---------- | ----- | ------ | ---- | ---- | ------------------------- |
| NAME | 40 | 40 | C | | Fire name |
| ACRES_CALC | 4 | 5 | B | | Calculated acreage |
| AGENCY | 3 | 3 | C | | Agency who tracked fire |
| CAUSE | 1 | 1 | I | | Code for fire cause |
| YEAR | 4 | 4 | I | | Year of ignition |
| MONTH | 2 | 2 | I | | Month of ignition |
| DAY | 2 | 2 | I | | Day of ignition |
| Agency | Description |
| BIA | USDI Bureau of Indian Affairs |
| BLM | Bureau of Land Management |
| CDF | California Department of Forestry and Fire Protection |
| CCO | Contract Counties |
| DOD | Department of Defense |
| FWS | USDI Fish and Wildlife Service |
| LRA | Local Response Area |
| NOP | No Protection |
| NPS | National Park Service |
| PVT | Private |
| USF | United States Forest Service |
| OTH | Other |