digital elevation model from stereo pair first experience naomi jackson 18-nov-2013
DESCRIPTION
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.TRANSCRIPT
Digital Elevation Model From stereo pair
First Experience
Naomi Jackson 18-Nov-2013
What is DEM?
Digital Elevation Model
is a 3-D representation of the terrain’s surface, created from elevation data
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.
DEM creation for Sabeto Catchment
SOPAC-SPC has purchased Stereo Pair image of Sabeto Catchment
Extract terrain parameters cost effective solution
DEM 1:10,000Soil mappingAgriculture planning for selected areasModeling water flow and mass movementWater catchment management for areas with high risk of flooding
Example of Stereo Pair
Right Image Left Image
Software
ERDAS 2013 – LPS TOOL
Method using sample dataMosaic 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
LPS project manager
Rational Polynomial Coefficient
This file is provided with the World View 2 Satellite imagery
Performs Correction – Corrects the Sensor distortion
Quick DEM Extraction
DEM extraction (2 steps)• the LPS Project Manager toolbar select the DTM Extraction button
• Select Output Folder
DEM Extraction Tool
Out Put
Challenges Loading imagery
Left Image Right image
Corresponding Rational Polynomial Coefficient
Next StepsImage data for FijiGround control point establishmentNew approach to software
SummaryDSM production software seems to work
Vinaka