The road, railroad, and stream features were not classified using
the imagery, but were later developed from GIS layers. Roads,
railroads, and streams were acquired as individual polyline
shapefiles. Buffers were created in ArcMap
®
to represent the
approximate width of these features. The buffer for streams
was 2 meters. The buffer for railroads was 10 meters. The
buffer for roads had two values: 12 meters for highways and 8
meters for all other roads. These buffers were then merged
with the other LULC types to produce the final classifications.
Since no field data points were collected for the stream feature,
it was not used in the accuracy assessment.