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Sally E. Goldin & Kurt T. Rudahl Geoinformatics Laboratory at KMUTT King Mongkut's University of Technology Thonburi Bangkok, Thailand. Expanding Access to THEOS with Free Educational Software. THEOS Data Users Meeting 13 February 2012. A New Era for Remote Sensing in Thailand.

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Sally E. Goldin & Kurt T. Rudahl

Geoinformatics Laboratory at KMUTT

King Mongkut's University of Technology Thonburi

Bangkok, Thailand

Expanding Access to THEOS with Free Educational Software

THEOS Data Users Meeting

13 February 2012

a new era for remote sensing in thailand
A New Era for Remote Sensing in Thailand
  • Abundant, affordable data
  • Near-real-time information
  • High resolution
  • Under Thai control
  • Agriculture
  • Water management
  • Forest conservation
  • Urban planning
  • Etc...
expanded user base for rs imagery
Expanded User Base for RS Imagery
  • Government agencies
  • Local administrative bodies
  • NGOs
  • Educational organizations
  • Commercial companies
  • Communities and cooperatives

Many of these new users will know little about analyzing and interpreting remote sensing data

what do these new users need
What do these new users need?
  • Theoretical knowledge
    • Principles of remote sensing
    • Limitations of imagery
    • Image processing algorithms
  • Practical skills
    • Interpreting images
    • Planning and executing analyses
  • Software tools
    • This is our topic today
introducing opendragon
Introducing OpenDragon
  • Easy-to-use image analysis and raster modeling
  • Multilingual user interface (including Thai)
  • Detailed user manual and context-sensitive help
  • Rich set of core analysis capabilities
  • Imports THEOS data sets
  • Programmer's Toolkit for extensibility
  • Free!
history of opendragon
History of OpenDragon
  • 1984-1986 - Goldin & Rudahl, at Asian Institute of Technology, recognize the need for affordable software for remote sensing education
  • 1987 – Dragon V1.0 – first remote sensing image analysis package to run on an off-the-shelf PC
  • 2004 – KMUTT provides three years funding for OpenDragon project, to make the software free for educational organizations in SE Asia. After project ends, Goldin-Rudahl Systems, Inc. continues support.
  • 2010 – Goldin-Rudahl Systems makes OpenDragon free for everyone, announces plan to open the source code
  • Since then, the software has been downloaded by people in 85 countries
opendragon was designed for teaching
OpenDragon was designed for teaching

Context-sensitive help explains every parameter

No magic or wizards – approaches analysis operations step by step

Scripting capability allows instructors to automate more complex operations

Fully internationalized, with versions for many languages

Users new to remote sensing do not have to struggle with English

opendragon capabilities
OpenDragon Capabilities
  • Gray, composite and pseudocolor display, image overlay, annotation, zoom, capture
  • Band arithmetic, vegetation indices, convolution, principal components, masking
  • Geometric correction/registration
  • Supervised and unsupervised classification including training, signature editing, MDM, max likelihood, K-means clustering, slicing, error analysis
  • Vector capture with image background, rasterization, measurement, area histograms, transect profiles, irregular subsetting, recoding
  • Interactive value display for pixels and regions
  • Buffering, aspect and slope calculation, multi-criteria modeling
  • Image histogram, scatterplot, statistics, metadata display and editing
  • Import and export of raster and vector data
  • Log capture to create scripts
programmer s toolkit
Programmer's Toolkit
  • Provides header files and libraries to allow users to add new capabilities to OpenDragon
  • Written in standard C for use with free compilers such as gcc
  • Read and write Dragon format images, vectors, signature files, etc. Manage meta data.
  • Excellent resource for education
    • Shortcut to teaching geoinformatics software development
    • Support for researchers developing new algorithms
education using opendragon case studies
Education using OpenDragon: Case Studies
  • High school workshop on drought analysis
  • 2B-KMUTT – High school research project
  • Graduate thesis work
  • Professional education in geoinformatics programming
high school remote sensing workshop
High School Remote Sensing Workshop
  • In October 2005, at the request of HRH Princess Maha Chakri Sirindhorn and with the cooperation of GISTDA, the OpenDragon project presented a three-day workshop for students from Mahidol Wittayanusorn school.
  • The topic was remote sensing for drought monitoring
  • Experts on remote sensing technology, meteorology, and water resources provide background lectures
  • Labs used OpenDragon for multitemporal analysis of images of reservoirs around Thailand, from normal versus drought years
  • On the third day, students presented their results and conclusions
opendragon high school workshop
OpenDragon High School Workshop

Normal Year

Drought Year

2b kmutt program
2B-KMUTT Program
  • Mathayom 5 students spend three weeks at KMUTT during summer break, working on research projects with faculty
  • One young woman worked with us to develop code for the Tassled Cap transformation using the Programmer's Toolkit
  • Although she knew nothing about remote sensing before she came to KMUTT and little about programming, she successfully completed her project.

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master s thesis
Master's Thesis

Improving the Estimated Area of Rice Cultivation by Classification Techniques

by Ithiphol Ekahitanonda

  • Compared standard maximum likelihood classification with multitemporal fuzzy-rule-based classification
  • Best fuzzy rule set was developed using Genetic Algorithms
  • Mr. Ithiphol wrote more than a dozen C modules using the Programmer's Toolkit to implement his novel algorithms
computer programming for geographers
Computer Programming for Geographers
  • Course for graduate students in Geoinformatics – many already work in geospatially-oriented positions
  • Presented twice at Chiang Mai University, once at Burapha University
  • Goal is to teach students enough programming that they can:
    • Understand how geospatial data is represented and manipulated in a program
    • Modify an existing program to customize its behavior
    • Understand what is “under the hood” of geospatial software in order to critically evaluate the answers that software provides
  • Half lecture, half lab – Programmer's Toolkit used for raster exercises
  • Hand-on work modifying real code builds students' confidence
how can you get opendragon
How can you get OpenDragon?
  • Go to
  • Fill in the contact form to register
  • You will receive a serial number by email
  • Return to the site. Enter the serial number to download the package, sample data, and the Programmer's Toolkit, if you wish
  • OpenDragon currently runs on Windows XP, Windows Vista and Windows 7. A port to Linux is planned for the future.
other resources
Other Resources
  • Learning Remote Sensing is a textbook aimed at new users of R/S imagery. It provides hands-on exercises using downloadable data sets
  • The book is available in both digital and print formats.
  • Contact us at break or visit the OpenDragon website for details
opendragon is not for everyone
OpenDragon is not for everyone
  • OpenDragon can process images up to 1024x1024 in size.
  • These capacity limits mean it is not appropriate for production image processing
  • Dragon/ips® Professional is a more powerful commercial version capable of processing full THEOS scenes
  • OpenDragon provides a way for new users to ease into the complex world of remote sensing image processing
  • OpenDragon speaks your language
  • OpenDragon is free
Contact us for more information!

Sally Goldin & Kurt Rudahl

Geoinformatics Lab at KMUTT