Geolocating a photograph without embedded GPS data is a recurring challenge in open source investigation, field verification, and conflict documentation. When metadata is absent or stripped, analysts must work from visible landmarks, architectural features, and terrain to determine where an image was taken.
One geometrically rigorous approach is ray intersection: bearing lines, each anchored to two identifiable landmarks on a map, converge at the camera position. The technique is well established in surveying and land navigation, but its application to open source image analysis has until now relied on manual, split-screen workflows and informal geometry.
TracePoint, developed by EAGLE alumnus Pawel Kluter (github.com/kluter), formalises this workflow as an open-source, browser-based tool. The inital development started during his EAGLE studies but he continued to develop him after he graduated. The tools works in a way, that an analyst places geo-referenced bearing lines on a satellite or street-level map, anchored to landmarks visible in the source image, and reads off the camera position at their intersection. Adding further lines generates a confidence ellipse around the result, visualising the spread of ray crossings and the reliability of the estimate.
The tool requires no installation and no image upload. An integrated EXIF viewer reads camera metadata and, where present, GPS coordinates and camera direction, placing a reference marker on the map alongside the geometric result. Multiple images can be worked within a single session, with bearing lines from different photographs placed simultaneously on one map.
When you think of a research internship in remote sensing, your mind probably jumps to lab screens, stacks of satellite imagery, and a lot of coffee. What you probably don't picture is standing in the middle of Kruger National Park, watching elephants move through the...
A while ago, we shared a lighthearted post about our EORC Earth observation characters. What stayed with us afterward were the reactions from colleagues around the world. Quite a few professors commented, half joking and half serious, that sometimes they wish they...
Our Department Head Prof. Hannes Taubenböck was honored to welcome Prof. Alejandra Stehr from the Universidad de Concepción and Prof. Rodrigo Cienfuegos from the Pontificia Universidad Católica de Chile at the Earth Observation Center (EOC) of the German Aerospace...
We are pleased to congratulate Julia Rieder on the successful defense of her PhD thesis! Over the past years, Julia has investigated how European beech forests respond to severe drought events and which factors determine whether individual trees survive or die under...
The University of Würzburg's press team recently featured the exhibition "Living with Science: Stories from Mwanza & Würzburg", an intercultural science communication project co-organized by our EORC colleague Dr. Sarah Schönbrodt-Stitt and Dr. Michael Thiel. The...
One of the aspects we enjoy most at EORC is the opportunity to collaborate across disciplines. A recent example is our interaction with Moritz Heimbach and Fernando Rodriguez, PhD students in the Embedded Systems and Sensors for Earth Observation (ESSEO) group led by...
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