Slide 1

MAPPING VERTICAL TERRAIN Greg Hosilyk California State University, Long Beach, in cooperation with University of Hawaii and Kualoa Ranch Funded by the National Science Foundation Slide 2 CURRENT TECHNIQUES Why map vertical terrain? Current technology, with a top down orientation cannot adequately capture vertical environments. Accurately representing vertical terrain can aid in analyzing data that is relevant to a variety of disciplines, such as: Resource Management Archaeology Hydrology Vegetation Natural Habitats Slide 3 SATELLITE IMAGERY Benefits Broad Spatial Coverage Multiple Spectra Relative Ease of Acquisition Limitations Top Down Orientation Resolution (Spatial & Temporal) Cloud Cover & Shadow Availability & Cost Slide 4 UAV IMAGERY Benefits Control of Environment Higher Spatial Resolution Limitations Top Down Orientation Coverage Cost Sensor Availability Slide 5 CURRENT PRODUCTS Skewed Imagery Shadow Clouds Slide 6 IMPROVED TECHNIQUE Adding three dimensional detail to two dimensional mapping systems Slide 7 DATA ACQUISITION Using a quadcopter and a geotagging camera set to shoot every 10 seconds, we capture transects of the subject. Slide 8 PHOTOSCAN Using Agisoft PhotoScan, we can build a better product with our images PhotoScan determines the location of the pictures based on GPS data and relationship to other photos Slide 9 PHOTOSCAN PhotoScan compares photos to each other looking for common points among them to build a 3D point cloud. Slide 10 PHOTOSCAN Combining the 3D model with the photography produces a much better product for vertical terrain. Slide 11 IMPROVED PRODUCTS Integrate with Existing Products Digital Elevation Model (DEM) Orthographic Photo Google Earth (KML) ArcGIS / ArcScene ERDAS Google Earth and more Slide 12 CONCLUSIONS & FUTURE WORK Conclusion There is a disconnect between PhotoScan and other software, resulting in less than ideal results Future Work Improved Image Acquisition Automated Flight Plans Better Camera Control Improved Georeferencing Ground Control Points Improved Products Software Advancements Slide 13 MAPPING VERTICAL TERRAIN Greg Hosilyk California State University, Long Beach, in cooperation with University of Hawaii and Kualoa Ranch Funded by the National Science Foundation