TracePoint: A Browser-Based Tool for Image Geolocation by Ray Intersection

TracePoint: A Browser-Based Tool for Image Geolocation by Ray Intersection

m

May 25, 2026

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.
TracePoint has been accepted into jivoi/awesome-osint (github.com/jivoi/awesome-osint), one of the most widely referenced open source intelligence resource collections on GitHub with over 25,000 stars, and into The-Osint-Toolbox/Geolocation-OSINT (github.com/The-Osint-Toolbox/Geolocation-OSINT), a dedicated geolocation resource list.

check it out:

follow us and share it on:

you may also like:

Mapping Lava Tubes on Mauritius with iPhone Pro LiDAR

Mapping Lava Tubes on Mauritius with iPhone Pro LiDAR

Lava tube structures on Mauritius are quite hard to survey - tight, dark, and largely inaccessible to classical scanning equipment. As part of ongoing research by Dr. Kim Lea Holzmann (Chair of Animal Ecology and Tropical Biology, University of Würzburg), we're...

Johannes Mast wins Bernd Rendel Prize

Johannes Mast wins Bernd Rendel Prize

Johannes Mast is awarded the 2026 Bernd Rendel Prize for Geosciences by the Deutsche Forschungsgemeinschaft (DFG) for outstanding research as part of his dissertation. Johannes’s highly interdisciplinary work bridges the Geosciences, Linguistics, Data Science, and...

Two days of celebration, and a hundred hands behind it

Two days of celebration, and a hundred hands behind it

We've written plenty about the EORC 25th and EAGLE 10th anniversary already, the timeline, the talks, the EAGLE panel discussion, the exhibition. But there's a story we haven't told yet, and it's honestly the one that matters at least as much. Because none of it just...

Small Gesture, Big Thanks: Chocolate in the Polar Bear Kitchen

Small Gesture, Big Thanks: Chocolate in the Polar Bear Kitchen

Pulling off a party for 250 people doesn't happen by magic. It happens because a bunch of people quietly say yes to the boring jobs, the carrying, the setting up, the standing around answering questions, the cleaning up afterward. Our combined 25th anniversary for...

Privacy Policy

Lehrstuhl für Fernerkundung & Lehrstuhl für Urbane Fernerkundung

Erdbeobachtung an der Universität Würzburg

Share This