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.
This week, the EORC is participating in the joint NSO-GfÖ 2026 conference in Odense, Denmark. The conference brings together researchers of all career stages from all across ecology research, representing a wide range of methods and applications, including topics at...
The drought of 2026 has once again highlighted the challenges that increasingly frequent dry periods and heat waves pose to agriculture. Against this background, the Bavarian State Research Center for Agriculture (LfL) organized a field day in Schwarzenau on 10...
Mapping mountain pine remains a challenge, particularly in steep Alpine terrain where Pinus mugo forms dense krummholz thickets that are difficult to separate from surrounding vegetation and hard to survey on the ground. In our new study led by Basil Tufail, we...
We will be actively participating at InterGeo this September: we've got a small booth right next to Wingtra's exhibition space, over in Hall B6, booth B6E045. Come by and have a look on what we've been working on across the EORC especially focused on our UAS earth...
Save the date for our next EORC Talk! On 6 October 2026, we will welcome Stephan J. Schmidt from Cornell University to the Earth Observation Research Cluster (EORC) in Würzburg. In his talk “Urban Form and the Heat Island Effect”, he will explore how the shape and...
Last week a group of PhD and EAGLE MSc students visited the Umweltforschungsstation Schneefernerhaus (UFS) at the Zugspitze for a workshop on research in high alpine ecosystems. The workshop was kicked-off by presentations from some of our students, who are conducting...
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