Coordinate system is UTM zone 18N based on WGS84 (units are meters).
The layers in the DXF drawing, their colors, and the information contained on each are as follows:
SOILS (Yellow): AutoCAD closed polylines representing the location of each soil type in the survey area.
LABELS (Red): AutoCAD text strings giving the soil type for each area. These text strings correspond to the UCS_F variable provided in the page "Information on Soil Classes". Their insertion points are inside the polylines they correspond to, for AutoCAD or other programs capable of matching text strings to polylines in this way.