About The Project

Topographic survey of future site for East Harbour Transit Hub in Toronto (Eastern Ave & DVP).  Survey limits included 900m of the Metrolinx Kingston and USRC subdivisions, sections of Eastern, Broadview and Queen streets, adjacent Cadillac Fairview owned property, and a portion of the DVP below the rail corridor.

The rail corridor was surveyed using aerial LiDAR drone technology.  Prior to flying, targets were spray painted on the top of rail ties and surveyed in the Metrolinx standard coordinate system, so that the LiDAR point cloud could be referenced in the same system.  Top of rail and top of bridge features were surveyed by hand using total station equipment.

City streets were surveyed with mobile LiDAR scanning.  The procedure is similar to aerial scanning in that targets were painted on the roadways as reference points for the Metrolinx coordinate system.  Mobile scanning was also used for the portion of the DVP within the survey limits.  Instead of painting scan targets on the highway, reference points were surveyed reflectorlessly with total station from the rail corridor and top of the rail bridge.  This avoided the use of traffic protection and closures on the highway, which would greatly impact the project budget.

Additional supplemental surveying was done with GPS and total station where drone flights or mobile scanning was not possible.

The client received CAD survey base plans (extracted LiDAR features and conventional survey data, combined in one deliverable), 3D DTM with contours, ortho photos, and point clouds.

Services Provided