1. Digital Elevation Model From stereo pair First Experience Naomi Jackson 18-Nov-2013

2. What is DEM? Digital Elevation Model is a 3-D representation of the terrain’s surface, created from elevation data

3. What is a Stereo Pair Image? A stereo-pair image contains two views of a scene side by side. One of the views is intended for the left eye and the other for the right eye These images are sometimes viewed with special equipment to direct each eye on to its intended target, but they are also often viewed without equipment.

4. DEM creation for Sabeto Catchment SOPAC-SPC has purchased Stereo Pair image of Sabeto Catchment Extract terrain parameters cost effective solution

5. DEM 1:10,000 Soil mapping Agriculture planning for selected areas Modeling water flow and mass movement Water catchment management for areas with high risk of flooding

6. Example of Stereo Pair Right Image Left Image

7. Software ERDAS 2013 – LPS TOOL

8. Method using sample data Mosaic the tiles LPS Project manager tool Create New Block File Model Setup – Relational Function (World View RPC) Block Property Set up – Select Reference Coordinate System Load Stereo Pair - Assign Rational Polynomial Coefficient (Provided with the WV2 Image) Point Process DEM Extraction

9. LPS project manager

10. Rational Polynomial Coefficient This file is provided with the World View 2 Satellite imagery Performs Correction – Corrects the Sensor distortion

11. Quick DEM Extraction DEM extraction (2 steps) the LPS Project Manager toolbar select the DTM Extraction button Select Output Folder

12. DEM Extraction Tool

13. Out Put

14. Challenges Loading imagery Left Image  Right image Corresponding Rational Polynomial Coefficient

15. Next Steps Image data for Fiji Ground control point establishment New approach to software

16. Summary DSM production software seems to work

17. Vinaka