Potential fens in the SCNF were identified from digital aerial photography and topographic maps. Each potential fen polygon was hand-drawn in ArcGIS based on the best estimation of fen boundaries and attributed with a confidence value of 1 (low confidence), 3 (possible fen) or 5 (likely fen).

Attribute fields:Confidence: 5 (likely fen), 3 (possible fen), 1 (low confidence fen)

Notes: a text field with any interesting or relevant observations

Acres: double numeric field with acreage

Name: a unique identifier for each potential fen polygon. The naming format is the 4 character Forest abbrievation (in this case BTNF) followed by a dash "-" and 5 digit number. Example: BTNF-09104

Fen Potential: a text version of the Confidence field, possible values: Likely Fen, Possible Fen, Low Confidence Fen.