Learning how to orthorectify aerial imagery with fiducial points with OrthoPhoto.io

Course Description

Proper geocoding of Aerial Imagery can be challenging. Aerial Imagery follows the pin-hole camera model where all light beams are passing through a single point. By taking also into account the relief of the targeted area, the resulting dataset has a location-based scale, rendering the usual polynomial transformations available via the common GIS software (e.g. 1st, 2nd, and 3rd order) not appropriate for the task.

To perform the orthorectification of a single aerial imagery one needs the following:

  • camera’s focal length
  • digital elevation model (DTM for orthorectified, DSM for true-ortho)
  • coordinates of camera fiducial points (for historical aerial images)
  • Ground Control Points i.e. image points with known 3d coordinates (X, Y, h)


To this end, this course provides the user with a quick introduction to OrthoPhoto.io which is a web-based platform providing the tools to perform the Orthorectification process. The output is compatible with all OGC-compliant GIS software and CAD systems capable of handling GeoTiff files.

Course curriculum

  1. 01

    • Introduction and system registration

    • New Project Creation and Preparation
  2. 02

    • Providing Fiducial Points to the System

    • Targeting Ground Control Points and Result Evaluation
  3. 03

    • Generation of Final output, and Integration with GIS Platforms

What will you learn?

  • How to register to Orthophoto.io

  • Data preparation and input of parameters

  • How to provide fiducial points to the system

  • Proper targeting of Ground Control Points

  • How to evaluate the final result

Student Profile?

  • Under/post graduate students

  • Professionals and Companies

  • Master students and PhD candidates

  • Researchers and Academics

Some more information

  • Certificates of Completion

    After you successfully finish the course, you can claim your Certificate of Completion with NO extra cost! You can add it to your CV, LinkedIn profile etc

  • Available at any time! Study at your best time

    We know hard it is to acquire new skills. All our courses are self paced.

  • Online and always accessible

    Even when you finish the course and you get your certificate, you will still have access to course contents! Every time an Instructor makes an update you will be notified and be able to watch it for FREE

About your Instructor

Dr Argyros Argyridis is a Rural & Surveying Engineer. He received both, his Dipl-Ing and PhD from the NTUA. His expertise covers the spectrum of Geographic Information Sciences, Remote Sensing, Earth Observation, and EU/Copernicus technologies. He is the author of 10+ publications in scientific journals, conference proceedings. His research, science, and technology interests include the investigation, implementation and integration of image analysis, machine learning, Geomatics/GIS, and knowledge representation methodologies, towards automation of mapping from Remotely Sensed data, along with the design and development of web-based Geoplatforms. His programming skills include multiple languages (e.g., C/C++, PHP, Python, SQL, JavaScript etc), along with relevant libraries and software for image analysis (Orfeo Toolbox, OpenCV, al ArcGIS technologies, ERDAS Imagine) machine learning (e.g. Tensorflow, Caffe), data management (e.g., PostgreSQL, MySQL, MSSQL Server, data exchange protocols, WMS/WFS, JSON/GeoJSON, SOAP, Rest Services), and Geoplatform development (OpenLayers, Leaflet, ArcGIS Server, ArcGIS Geoportal, and ESRI technologies). His management skills include timely coordination of projects, proper management and allocation of human resources, significant communication skills, and budgeting.

Dr. Argyros Argyridis

Earth Observation Analyst & GIS Architect