Orthorectification of Aerial Photos

Total study time: 24 hours

How can you tell if an aerial photo truly reflects reality? In this one-on-one course, you’ll learn how to transform distorted aerial imagery into accurate, georeferenced maps using orthorectification. With personal guidance and hands-on assignments involving aerial photos, ground control points, and elevation models, you’ll gain practical skills that take your GIS projects to the next level.

What is orthorectification?

Aerial photos are a rich source of spatial information. However, to make them useful for mapping and analysis, they first need to be geometrically corrected—a process known as orthorectification.

Distortion often occurs because aerial images are captured using the pinhole camera model, where all light passes through a single point. This can cause objects to appear skewed or misaligned. Add terrain elevation into the mix, and the scale of the image changes across different areas. That’s why standard GIS corrections—like first, second, or third-order polynomial transformations—usually aren’t enough.

To orthorectify aerial imagery properly, you’ll need:

  • The focal length of the camera used
  • A digital elevation model (DTM for orthorectification; DSM for true ortho imagery)
  • Coordinates of fixed camera positions (especially for older photos)
  • Ground control points (GCPs): clearly visible features with known X, Y, and elevation values

With these inputs, you can align, correct, and georeference the image with high precision. The result? A scale-accurate, reliable dataset you can confidently use in your GIS projects. That’s why orthorectification is a key skill in any geospatial workflow.

What will you learn in this blended learning course?

This course shows you how to turn aerial images into high-quality, GIS-ready maps. You’ll start with the basics of photogrammetry—learning how to extract spatial information from standard aerial photography. Then, you’ll move on to correcting image distortion using ground control points and elevation models.

You’ll use the Orthophoto.io platform to process your data. You’ll learn how to set up your account, upload imagery, and configure processing parameters. Step by step, you’ll add GCPs with known coordinates and run the orthorectification process.

Quality control is a big part of the training. You’ll learn how to check whether your final image is geometrically correct and properly aligned—ensuring your data is ready for spatial analysis and map integration.

Why choose this orthorectification course?

Blended learning gives you the best of both worlds—live interaction and flexible self-paced study—so you build both theory and hands-on skills in orthorectification and aerial photo analysis.

We begin with a live session where you’ll jump straight into correcting real aerial imagery. With expert guidance, you’ll identify distortions, set key parameters, and use Orthophoto.io to align and georeference your photos.

Next, the self-paced modules let you explore core topics in more depth. You’ll work through lessons on photogrammetry, terrain models, and GCP management. Along the way, you’ll practice prepping your data, entering coordinates, and verifying the accuracy of your results.

In a second live session, you’ll put your knowledge into practice. You’ll troubleshoot workflows, refine your results, and get personalized feedback to improve your outputs.

A key feature of the course is its real-world application. You’ll produce usable outputs—like corrected, georeferenced images—that integrate directly into GIS workflows for infrastructure planning, spatial analysis, or environmental studies.

By combining expert instruction with flexible learning, this course goes beyond the basics. By the end, you’ll have the skills and confidence to process aerial imagery, perform accurate corrections, and support smarter, data-driven decisions in your field.

Sign up for this
Blended Learning

    Price: €395 (excl. VAT)



    Start:
     2-hour online session


    Self-study:
     Review course materials


    End:
     1-hour online session



    You’ll receive 1-on-1 guidance. After signing up, our course coordinator will contact you to schedule your first session.

    Learning Outcomes

    After completing this course, you will be able to:

    • Correct and georeference aerial photos for use in GIS
    • Enter and verify ground control points for improved accuracy
    • Use Orthophoto.io to process and align aerial imagery
    • Apply digital elevation models for scale-accurate image correction

    More Information?

    Do you have questions about the course content? Not sure if the course aligns with your learning objectives? Or would you prefer a private session or in-company training? We’re happy to assist—feel free to get in touch.

    Frequently Asked Questions

    We aim to make our courses accessible to as many people as possible. If the course fee is a concern, instead of registering directly, you can indicate on the registration form that you’d like to receive a quote tailored to your needs. In many cases, we can offer flexible solutions. For instance, we can adjust the course content for large groups, shorten the course based on existing knowledge, or offer daily rates to suit your requirements.

    Yes, you can reach out to the instructor with questions for up to 2 weeks after the course. Since the instructor is likely teaching other courses, we recommend emailing your questions to info@geo-ict.com. We’ll forward your inquiry to the instructor, and you’ll receive a response within 24 hours. After the 2-week period, we recommend using our Personalized Online Support for continued assistance.

     

    Yes, we offer on-site training regularly throughout the Netherlands. Our instructor will bring laptops for the participants, and all you need to do is arrange a suitable room at your location.

    Please send your requirements to info@geo-ict.com, and we will provide a customized quote, which will include travel and accommodation costs. Once the quote is confirmed, our course coordinator will reach out to schedule the training days.

    After each course, participants receive a link to our evaluation portal where you can share your feedback on what you liked and didn’t like. We strive to provide a great experience for all our participants, but if you have a complaint, please click on ‘Complaints Procedure’ in the portal. This document will guide you through the steps to take. Geo-ICT Training Center, Netherlands, is a member of the Dutch Council for Training and Education (NRTO), ensuring a fair and transparent process.

    Courses are typically scheduled according to the Dutch time zone, with sessions running from 9:00 AM to 12:00 PM and 1:00 PM to 4:00 PM. For participants in different time zones, we adjust the course times in consultation with you.