| Peace Arch Canadian Border Crossing

Homeland Security Coordination AERO-METRIC Walker Division provided engineering-scale mapping for this 46-acre GSA project. The scope includes the main border crossing into Canada, the new Peace Park, segments of I-5, and portions of the adjacent City of Blaine. Walker was a subcontractor to Bush, Roed & Hitchings (BRH), the project land surveyor. Walker coordinated with the Department of Homeland Security to obtain clearance to fly at 1,000' over the border crossing. Deliverables were 1:200 mapping with 0.25m contours and 1:200 orthophotographs with 5.0cm pixels. Spot heights were provided to an accuracy of 5.0cm.

"Walker’s highly accurate and detailed product enabled BRH to seamlessly merge the photogrammetry with our ground mapping. This was accomplished through close project coordination, using a common Auto-CAD layering scheme, and crosschecking data points in the field. The results were beyond expectations." —Darrell Nance, PLS, Sr. Associate, Bush, Roed & Hitchings, Inc.

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