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Annapolis Valley LiDAR DEM

Annapolis Valley LiDAR

Dr Tim Webster (AGRG) - Data and Modelleing, Greg French (AGRG) - Google Maps implementation.

High-resolution Digital Elevation Models (DEMs) have been derived from a new remote sensing technique known as airborne laser altimetry or LiDAR. The LiDAR surveys were conducted in the summer of 2000 and the spring of 2003 and 2004 for the Annapolis valley region Nova Scotia. The surveys were flown by two private sector companies utilizing three different LiDAR systems over the course of the project. Funding for the project was provided by a grant to AGRG by the Canada Foundation for Innovation to conduct applied geomatics research in the coastal zone. Although one of the areas had to be reflown in order to meet the accuracy specifications of the survey, all data have met the required accuracy specifications. The LiDAR data were delivered separated into ‘ground’ and ‘non-ground’ points which have been used to construct DEMs and Digital Surface Models (DSMs) within the ArcGIS environment. The resulting surfaces have been used to demonstrate the benefits of LiDAR technology in the fields of earth sciences, both bedrock and surficial mapping, and for flood risk mapping from coastal storm surge events and future sea-level rise from climate change. The different surveys of the valley have been merged into one continuous elevation model at a 2 m cell size. This surface has been used to construct a colour shaded relief map that is now available to view as a google map product.

For a full description of the contents of this map and the data it represents, please see: Construction of the Valley LiDAR DEM

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