Remote Sensing - Lab 7

Background and Goals
This lab is meant to develop skills in performing key photogrammetric tasks on aerial photographs and satellite images.  By the end of the lab, skills achieved will be: understanding the mathematics behind the calculation of photographic scales, measurement of areas and perimeters of features, and calculating relief displacement.


Methods
Part 1: Scales, measurements, and relief displacement
Section 1: Calculating scale of nearly vertical aerial photographs

Section 2: Measurement of areas of features on aerial photographs

Section 3: Calculating relief displacement from object height

Part 2: Stereoscopy
Section 1: Creation of an anaglyph image with the use of a digital elevation model (DEM)

Section 2: Creation of an anaglyph image with the use of a LiDAR derived digital surface model (DSM)

Part 3: Orthorectification
Section 1: Create a new project

Section 2: Add imagery to the block and define sensor model

Section 3: Activate point measurement tool and collect GCP's

Section 4: Set type and usage, add second image to the block and collect its GCP's

Section 5: Automatic tie point collection, triangulation and ortho resample

Section 6: Viewing the orthorectified images


Results




Sources
National Agriculture Imagery Program (NAIP) images are from United States Department of Agriculture, 2005.  Digital Elevation Model (DEM) for Eau Claire, WI is from United States Department of Agriculture Natural Resources Conservation Service, 2010.  Lidar-derived surface model (DSM) for sections of Eau Claire and Chippewa are from Eau Claire County and Chippewa County governments respectively.  Spot satellite images are from Erdas Imagine, 2009. Digital elevation model (DEM) for Palm Spring, CA is from Erdas Imagine, 2009.   National Aerial Photography Program (NAPP) 2 meter images are from Erdas Imagine, 2009.