[IMAGEM_CAROUSEL]

ESTEIO executed Ground Photogrammetry services to support the preservation and restoring activities of Torre de Garcia D’Ávila Castle, historical building from the 17th century, located in the State of Bahia, Brazil.

Executed services consisted of taking pictures using photogrammetric ground camera, materialization and survey of support point coordinates in the building’s facade, aerial triangulation, photogrammetric capture (planialtimetric stereocompilation) and generation of colored digital orthophotos.

Having as contracting party the Military Engineering Institute and the purpose to support the planning step of the restoration and as graphic documentation element of the current characteristics of the monument.

Photogrammetric Capture was executed aiming at the identification and representation of the building facades characteristics and the building as a whole, such as materials used, structure, construction methods, etc, and preservation conditions such as presence of holes, cracks, missing elements, etc, in addition to capture information to obtain a numeric model representing the relief as support to make the digital orthophoto.

Main Characteristics of this Service:

    • Taking pictures with WILD P−32 metric camera and special colored and Black & White films. The scale used to take the photos was 1:300;
    • Support points were materialized through fixation on targets in strategically located points on facades previously to the photo shooting step;
    • Photogrammetric Capture was made on ZEISS Planicomp C−120 Analytical Stereo plotter equipment and the stereocompilation scale adopted was 1:50;
    • Final files were edited using the TEMap software developed by ESTEIO and elements such as mask, legend and explanatory texts were inserted;
    • Digital orthophoto was made from negatives of colored photos scanned in photogrammetric scanner (Leica − Helava DSW 100) with 2000 dpi resolution. Images were rectified at the DPW 770 Leica − Helava Digital Photogrammetric Station using the Socet Set software. Digital orthophoto with 600 dpi resolution was printed in a laser photo plotter with 2000 dpi resolution.