Control Points Defined

Regular visitors will know we use the UWIS system to track our movements and camera positions as we work on the Vobster Photogrammetry Project. But what if we turned the idea on its head? Instead of tracking the camera or diver as it moves around could we use the UWIS tracker units as a static Read more about Control Points Defined[…]

A Snapshot in Time

Regular followers of the Vobster Photogrammetry Project will know we have been working on this for some time. The project is all done in our spare time, for free and for the sheer joy of pushing the boundaries of photogrammetry. The game changer has been the introduction of UWIS and underwater GPS. To keep the Read more about A Snapshot in Time[…]

Accuracy Defined?

Underwater GPS meets Photogrammetry For a while we have been using GPS located cameras to construct highly accurate models of defensive structures known as pillboxes. Fixing a camera position above the waves is straightforward enough and you can build representative models without additional scale bars or measurements if the GPS signal is accurate. The problems Read more about Accuracy Defined?[…]

DEMS – Another View

Slope Analysis As we have discussed before Digital Elevation Models help us understand subtle changes in depth (or height) of the subject. We also think they are art in their own right. Tucked away in the 1.4 release of Agisoft Photoscan Pro is a preference that adds slope analysis. The colours applied to the model Read more about DEMS – Another View[…]

Drain the Pirate City

Pirate Port in the Press Published in this month’s BSAC SCUBA magazine is a four page account of how Jamaica’s Port Royal was scanned on behalf of MSP/National Geographic/Discovery Canada for the production of Drain the Sunken Pirate City. The programme now being broadcast on National Geographic Channel here in the UK. Port Royal is Read more about Drain the Pirate City[…]