Rhino Augmented Drawing 3D Scanning Arc GIS

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photo = light // gram - drawing // mery = measurement
 
Photogrammetry or Structure-from-Motion is defined as; ‘Photogrammetry is the art, science, and technology of obtaining reliable information about physical objects and the environment through processes of recording, measuring, and interpreting photographic images and patterns of recorded radiant electromagnetic energy and other phenomena’ (Wolf and Dewitt, 2000; McGlone, 2004)
Essentially three dimensional data can be extrapolated from a sequential series and overlapping of two dimensional photographs. You can build three dimensional models of the world around you with simply a camera or a phone.
Very quickly. These can be used as layers in a drawing, in 3D modelling programmes, as a contextual archive, to manipulate or simply for the sheer fun to be had with photogrammetry.
 
 

🤳Process

  1. Take multiple photos of an object or fragment of a building. Anywhere from 20-60 images is best and there is no need for high quality at this stage so a phone camera works well.
    1. For this step, I took a 360 set of images of this lamp.
    2. It's important that the images have around 40-60% overlap to work correctly with the software.
  1. In the software Agisoft Metashape, add the images by Right Clicking 'Chunk' > Add > Add Photos
      2. notion image
  1. After adding the images as .jpegs, it should look like this. I've uploaded a total of 55 images.
      2. notion image
  1. Next, Right Click on 'Chunk 1' > Process > Build Dense Cloud
    1. You can also switch to Dense Cloud rather than Point Cloud from the top toolbar to view the scan in a higher definition
      2. notion image
  1. If you wish to build a mesh of the scan you can do so by doing Right Click > Process > Build Mesh
  1. To export the scan, we can export as various file types. To import into Sketchfab, the .obj and .ply file formats work best as a Points export.
 

☁️ 3D Scan Output

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