January 30, 2015 © 2006 Mercator Land Surveying
Surveying in
Salt Marshes
J. R. Lemuel Morrison, PLS
Mercator Land Surveyi...
January 30, 2015 ©2006 Mercator Land
• Buckeye
• Licensed: NJ, NY & OH
• Instructor, NYC College of
Technology
• President...
January 30, 2015 ©2006 Mercator Land
Outline
Challenges to Surveying in MarshesChallenges to Surveying in Marshes
Our Meth...
January 30, 2015 ©2006 Mercator Land
The Challenges of Surveying in Marshes
Vegetation
Phragmites, vines and brush can mak...
January 30, 2015 ©2006 Mercator Land
Our Method to Survey in the Marshes
Plot lines at 50’ intervals over the site
with or...
January 30, 2015 © 2006 Mercator Land Surveying
What is an Argo?What is an Argo?
It is 8-Wheel Amphibious ATV. We
have a C...
January 30, 2015 © 2006 Mercator Land Surveying
Advantages of using an ArgoAdvantages of using an Argo
Plows through the t...
January 30, 2015 © 2006 Mercator Land Surveying
Disadvantages of using an ArgoDisadvantages of using an Argo
Requires matu...
January 30, 2015 ©2006 Mercator Land
Questions
January 30, 2015 ©2006 Mercator Land
Questions
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Surveying in Salt Marshes

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Presentation made at NJSPLS SurvCon in February 2007.

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Surveying in Salt Marshes

  1. 1. January 30, 2015 © 2006 Mercator Land Surveying Surveying in Salt Marshes J. R. Lemuel Morrison, PLS Mercator Land Surveying
  2. 2. January 30, 2015 ©2006 Mercator Land • Buckeye • Licensed: NJ, NY & OH • Instructor, NYC College of Technology • President & Founder, Mercator Land Surveying J R Lemuel Morrison, LS
  3. 3. January 30, 2015 ©2006 Mercator Land Outline Challenges to Surveying in MarshesChallenges to Surveying in Marshes Our Method to Survey in MarshesOur Method to Survey in Marshes The Advantages and DisadvantagesThe Advantages and Disadvantages
  4. 4. January 30, 2015 ©2006 Mercator Land The Challenges of Surveying in Marshes Vegetation Phragmites, vines and brush can make marshes nearly physically impossible or very time consuming to go through. Conventional surveying is also nearly impossible. Aerial photography and LIDAR are not feasible. Matches are out of the question. Vegetation Phragmites, vines and brush can make marshes nearly physically impossible or very time consuming to go through. Conventional surveying is also nearly impossible. Aerial photography and LIDAR are not feasible. Matches are out of the question. Soft Ground Mud in varying degrees of firmness makes a marsh difficult to walk or setup up instruments Soft Ground Mud in varying degrees of firmness makes a marsh difficult to walk or setup up instruments Watercourses Drainage ditches, creeks and salt flats require flotation to get across. Watercourses Drainage ditches, creeks and salt flats require flotation to get across. Tides Tide are accentuated and do not directly follow published values. Areas exposed during low tide are extremely soft. Tides Tide are accentuated and do not directly follow published values. Areas exposed during low tide are extremely soft.
  5. 5. January 30, 2015 ©2006 Mercator Land Our Method to Survey in the Marshes Plot lines at 50’ intervals over the site with orthophotography as a background. Plot lines at 50’ intervals over the site with orthophotography as a background. Use GPS to RTK mode to trace out the lines and then pick up changes and spot elevations every 50’ Use GPS to RTK mode to trace out the lines and then pick up changes and spot elevations every 50’ Use an Argo, directed by GPS, to clear lines and for transportation around the site. Use an Argo, directed by GPS, to clear lines and for transportation around the site. Use Argo in the water to collect cross sections of drainage canals and creeks. Use Argo in the water to collect cross sections of drainage canals and creeks.
  6. 6. January 30, 2015 © 2006 Mercator Land Surveying What is an Argo?What is an Argo? It is 8-Wheel Amphibious ATV. We have a Conquest and a Centaur It is 8-Wheel Amphibious ATV. We have a Conquest and a Centaur The features useful to us: • Skid Steer for manueverability. • Treads to spread the weight. • Winch to help pull us out. • Roll bars for safety and vantage point. • An outboard motor for propulsion. • Bumpers and a brushguard for the inevitable collision The features useful to us: • Skid Steer for manueverability. • Treads to spread the weight. • Winch to help pull us out. • Roll bars for safety and vantage point. • An outboard motor for propulsion. • Bumpers and a brushguard for the inevitable collision
  7. 7. January 30, 2015 © 2006 Mercator Land Surveying Advantages of using an ArgoAdvantages of using an Argo Plows through the thickest vegetationPlows through the thickest vegetation Easily traverses soft groundEasily traverses soft ground Crosses shallow water with vegetation easily.Crosses shallow water with vegetation easily. Provides an excellent vantage point to see over vegetation. Provides an excellent vantage point to see over vegetation. . . . And it’s plain cool. . . And it’s plain cool
  8. 8. January 30, 2015 © 2006 Mercator Land Surveying Disadvantages of using an ArgoDisadvantages of using an Argo Requires maturity & skillRequires maturity & skill Requires a lot of repair and maintenanceRequires a lot of repair and maintenance Needs a significant monetary investment.Needs a significant monetary investment. Requires safety procedures (e.g. boat safety, crash protection, terrorist awareness) Requires safety procedures (e.g. boat safety, crash protection, terrorist awareness) Requires operating procedures (e.g. overheats, gets stuck, treads come off, crashes) Requires operating procedures (e.g. overheats, gets stuck, treads come off, crashes) . . . And you will get very muddy and wet. . . And you will get very muddy and wet
  9. 9. January 30, 2015 ©2006 Mercator Land Questions
  10. 10. January 30, 2015 ©2006 Mercator Land Questions

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