Veris Technologies OpticMapper - Application Note - Manual (Page 2)

begin a new file and make sure both conditions are represented with calibration
samples.
Figure 2. Data shift due to adjustment of OpticMapper during mapping
c) Inconsistent row unit penetration
—if the OpticMapper encounters a wheel track on
one pass and soft soil the next, there will be a different sensing depth for the two
passes. Similarly, if one pass is in bare soil and the next behind the combine pass with
thick residue, there could be a moisture difference at the sensor operating depth.
These appear as stripes in the map (Figure 3). To avoid, drive at slight angle to
predominate field traffic pattern if possible; this should eliminate streaks/strips, and will
help isolate cause if they occur (Figure 4). If not possible to map at angle, avoid wheel
tracks and heavy residue strips if possible. Move over if necessary
—consistent soil
conditions are more important than consistent swath width.
Figure 3. Stripes due to inconsistent penetration or equipment issue