Mapping of Acadia University's Irving Botanical Gardens
Objective
The goal of this project was to produce a planimetric map of the Hariett Irving Botanical Gardens located on the Acadia University campus in Wolfville, Nova Scotia. The primary focus was to collect mapping grade information of the gardens layout including walkways and tree locations.
Photo Acquisition
Photos were collected during two flights in the fall and winter with a 10MP Canon EOS 40D and 50mm lens from a Cessna 172. For each flight the altitude was approximately 800 - 1000ft resulting in an average ground pixel resolution of approximately 25cm. Over 400 photographs were captured over both flights which followed a circular pattern around the area of interest.
Photo acquisition time was approximately 22 minutes, including some time spent collecting reference vertical photography of the same area. From these photographs, 8 were selected for orientation and digitzing.
GCP Collection
GCPs utilized for this project were collected using GPS during a previous case study. A total of 63 control points and three polygon areas were collected over two afternoons throughout the area with a total of 6 hours in the field. Only 5 of these locations were used as GCPs for photograph orientation with the remaining used for data verification.
Feature Collection
Features collected included buildings, walkways, study gardens, grassy areas, and trees (deciduous and coniferous). Over 200 individual features (including the KC Irving Environmental Science Centre) were collected in just two days (~16 hours) of work.
Results
For a relatively small amount of digitizing time, a comprehensive planimetric map of the Irving Gardens was created. In addition, a simple 3D model of the KC Irving Environmental Science Centre building was also built; demonstrating ObliqueMapper's capacity to capture detailed data in both 2D and 3D.
