Objective: This shapefile is intended to provide relative location data on the roads in the Norris Flats area, as well as their information about condition. Many roads in this area are in poor condition, or have completely disappeared, contradictory to satellite imagery.

Equipment: Emlid RS2 Multi GNSS Receiver

Mapping Techniques: Line polygons were collected from a slow moving four-wheel vehicle, with the rover receiver secured out the rear passenger window, and the passenger collecting points at important feature vertices using a single connection type at a 5 Hz update rate. Road beginnings and ends were based on observable natural intersections throughout the area.

Base Station: No base station was used.

Editing: Topological rules were added to this data to produce a more cohesive depiction of roads. Dangles resulting from inaccuracies where road lines should connect were identified and repaired.

Estimated Accuracy: Estimated Accuracy is sub 0.5m for most points, with a few outliers.

Spatial Reference Information: NAD 1983 (2011) StatePlane Montana FIPS 2500 (Intl Feet)

Fields: One field was added to the gps data of this feature, being condition. Condition was judged on a numeric scale for ease, with 1 being the best condition and 4 being the worst. Placement was based on factors such as road bumpiness and the presence of holes.