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Thursday, May 23 • 1:30pm - 2:00pm
Use of LIDAR data to help with mapping wetland boundaries

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The Planning Division in Pierce County maintains a wetland layer for unincorporated Pierce County known as the County Wetland Inventory that is edited based on field visits related to land development. This method ensures that a wetland boundary is verified and accurately mapped within the property being reviewed. The problem with this method is that there is no mapping of the wetland boundary outside of the property being reviewed. This is where the use of LIDAR data to visualize the ground elevations has been beneficial for many instances.

LIDAR and derived products viewed through LP360, as an ESRI ArcMap extension, has been used to expand the capabilities of wetland mapping for the past two years. It has been used to refine previously mapped wetlands as well as expand the boundaries of wetlands verified and delineated during field visits. LIDAR has not been the answer in all cases but has been very helpful. Until a time when all wetlands have been mapped in the field (not likely) a tool such as LIDAR will continue to play an integral role.


Aaron Petersen

Mr. Aaron Petersen is a GIS Specialist with the Pierce County department of Planning and Public Works. He has worked as a GIS professional for over ten years, with experience working with both local governments and federal natural resource agencies. He holds a M.A. in Geography from... Read More →

Thursday May 23, 2019 1:30pm - 2:00pm
GTCC RM 318 Tacoma Convention Center, 1500 Commerce St, Tacoma, WA 98402

Attendees (34)