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13 de Febrero 2006

Trimensions 3D Photogrammetry in Google Earth

3D Building Photogrammetry in Google EarthA company in France called Trimensions has developed a technique using photogrammetry to convert photos of buildings into highly detailed 3D models and, of course, can convert them into Google Earth models. They recently posted an example at the Google Earth Community (GEC). You can see their example (730 Kbytes), which is a 3D Building called Quartier de La Madeleine in Paris, France. The model has an amazing degree of detail showing all windows, ledges, and even railing on a balcony. You can also compare it to the satellite photo of the building underneath the model. Trimensions does not provide any details on their technique at either their web site or in the post. But, they do have some pictures of other buildings there.

GEB has previously shown examples of highly detailed 3D buildings here and here by Dr. Andrew Hudson-Smith at his blog Digitally Distributed Environments. Andrew has already published a number of buildings in London, England. Perhaps he inspired these guys at Trimension? Anyway, it's nice to see these really cool 3D building models!

Enviado por FrankTaylor at 13 de Febrero 2006 a las 07:32 AM

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  • Comentarios

    time for some quake in 'real' mode

    Enviado por: bernard at 13 de Febrero 2006 a las 09:21 AM

    It is very detailed indeed.

    But after doing 3d modelling for years now, I have my doubts that this is the outcome of an automated photogrammetric process.

    It may be based on photogrammetry, but there must have been handwork involved. Just look at the accurate downpipes in the court or at the perfectly aligning lines.

    If they posted the whole Paris Opera building in that detail level, I would have been convinced ;)

    Enviado por: Volker at 13 de Febrero 2006 a las 09:54 AM

    From what I can read of the website, they start with a 3D model and later map the photograph to the model, then they can incorporate it into Google Earth.

    Not to take away anything from the nice results, It's still a very nice model, but the level of detail seems to be simply unavailable compared to the 3D wireframe model they start with.

    From the website:

    3D-representation involving an integrated set of techniques, to allow full use of information obtained through metric photography and emulated analytically on computer.

    Plans, sections, elevations and isometrics are reliably executed with highly technical instruments such as : metric camera, theodolite, photogrammetric computing program and CAD software.

    Execution is performed to the exact required scale. The degree of definition can optionally be refined, particularly for surface textures, allowing precise reading of the materials used. This is a feature exclusive to TRIMENSIONS, and is not found on any other system currently in use.

    Enviado por: D Zurn at 13 de Febrero 2006 a las 02:35 PM

    My roommate is an architect and from what I can tell, the model was built by hand using 3D modelling software like Sketchup and then a picture was later mapped to the model. I really doubt that photogrammetry was used to convert photos of buildings into highly detailed 3D models, if I am wrong, than this truly is revolutionary!

    Enviado por: Jman at 13 de Febrero 2006 a las 05:38 PM

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