Conclusion
In comparison with remote sensing
techniques, the photo interpretation
drainage tile lines generally showed
improved accuracy with greater
precipitation totals having occurred
within the ten day period prior to the
photo being taken. This suggests a
higher rain value allows for the photo
interpreted and remote-sensed tile lines
to be in agreement. The photo
interpretation tile lines fell within the
decision tree analysis area 88.8% of the
time. These findings suggest photo
interpretation is a useful technique to
map unknown drainage tiles. However,
existing data or ground-truthing would
validate these findings further.
Acknowledgements
I would like to thank the faculty at Saint
Mary’s University, Ms. Greta Bernatz,
Mr. John Ebert, and Dr. David
McConville, for sharing their
knowledge, time, and support. A special
thanks to the La Crosse Fish and
Wildlife Conservation Office for
sparking an interest in this subject and
support for this tile mapping project. I
also would like to thank JC Nelson for
his continuous mentoring and advice.