Georectification: A Study on Using Erdas Imagine for Spatially Accurate Mapping

Geography Report
GEORECTIFICATION
Table of Contents
Objectives...........................................................................................1
Introduction.......................................................................................1
Material and methods............................................................................1-13
Results and discussion...........................................................................14-15
Summary..........................................................................................16
Flow chart..........................................................................................17
Reference..........................................................................................18
1

Objectives
The object of this study was to learn on how to use Erdas Imagine and the try to geeorectify a satellite
image of the Eyre Peninsula to enable its use in spatially accurate mapping (Antonio Pratelli, 2011).
Introduction
Erdas imagine is a new tool on the market. It is an image processing application that can be used
to process various data including geospatial, imagery and vector data. The advantage of this tool
over tools of similar is that it can process hyperspectral imagery and LiDAR from various
sensors and also offers 3-dimensional viewing module, that is virtualGIS. In addition, Erdas is a
remote sensing tool (Miljenko Lapaine, 2017).
This surveying tool is available commercially and has been in continued development beginning
1978 by the parent company, Erdas (Gao, 2009). Basically, this tool, Erdas uses pixels for
visualization, manipulation and analysis of aerial and satellite images and various geographical
data. Erdas offers many image processing functions and they include orthorectification, GIS
analysis, production of maps, SAR image processing and 3-dimensional visualization.
Materials and Methods
The study started by opening the Erdas image too and after copying the folder file containing
Eyre Peninsula data and pasted the file into a portable hard drive.
Then the main panel was opened and selected “open raster layer” and thereafter navigated to
where the file was and opened through application (Gustavo Camps, 2011).
2

The image file for rectification was put into the Erdas software
After fitting the image of Eyre Peninsula to frame the group tried to investigate the dataset using
different multispectral band combinations with the aim of examining vegetation, soil, urban
development and many more.
3

After opening transform and ortho-correct group, the Bing Aerail Layer was selected and it
finally opened in a multipoint geometric correction view. The Bing aerial view will eventually
load in the RHS and Australia and then Eyre Peninsula were located. The image of Eyre
Peninsula was then zoomed and compared with the image under georectification (Wilpen L.
Gorr, 2016).
Transform & Ortho-correct group icon was then opened which then opened the multipoint
geometric correction workspace.
4