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« on: April 27, 2016, 01:34:05 PM »
Hi,
1. PDF files are not really optimized for displaying large amounts of points/polygons. Therefore a reduction usually is necessary. The red color is a indicator for a selection; so when your mesh/ points turn red it means you selected it.
2. The accuracy of the pointcloud is dependend on quite a few different factors. In lectures, I usually divide them into internal and external influences: Internal being everything involving the camera. To name a few, you have sensor noise (somewhat related to pixel pitch size), lens distortion, image sharpness (AA-filter, bayer pattern vs. monochrome, lens quality), depth-of-field vs. diffraction etc.
External factors would be things like image overlap, the type of object reflectance (diffus, specular, etc.), texture and structure of the surface, ground-sampling-distance etc.
3. Not quite sure what you mean with viewing point coordinates. AFAIK you can't pick a single point and view it's coordinate. You can do that with free software such as Cloudcompare.
4. Well, you can decide the geometric resolution of the orthoimage- so if you know a pixel in your original image has a GSD of 1cm, just set 1x1cm in the output tab.
Hope that helped-
Cheers.