Very cool proof of concept. How did you transform the point cloud into the proper coordinate system? I am especially interested to know how you addressed tilt, roll, and scale. Do you have any sense of the accuracy of the transformation. Thanks for sharing your work.
@n8craig I used ArcMap's Spatial Adjustment tool, basically georeferencing the points based on a few corresponding locations on aerial imagery. There is a z-value within the CSV that I extracted from Photosynth, but it's a relative z-value, so I exaggerated this value until it looked accurate, compared to the pictures I took of the statue. So, I would say that my methods created a final GIS file that is...not very accurate.
For an updated method of collecting the point cloud data, look up Christoph Hausner's SynthExport, Kean Walmsley's BrowsePhotosynth, and Henri Astre's PhotosynthToolkit.
Very cool proof of concept. How did you transform the point cloud into the proper coordinate system? I am especially interested to know how you addressed tilt, roll, and scale. Do you have any sense of the accuracy of the transformation. Thanks for sharing your work.
n8craig 1 year ago
@n8craig I used ArcMap's Spatial Adjustment tool, basically georeferencing the points based on a few corresponding locations on aerial imagery. There is a z-value within the CSV that I extracted from Photosynth, but it's a relative z-value, so I exaggerated this value until it looked accurate, compared to the pictures I took of the statue. So, I would say that my methods created a final GIS file that is...not very accurate.
tsinn 1 year ago
For an updated method of collecting the point cloud data, look up Christoph Hausner's SynthExport, Kean Walmsley's BrowsePhotosynth, and Henri Astre's PhotosynthToolkit.
nathanaelawrence 1 year ago