https://communities.bentley.com/members/7f07a8e1_2d00_57c7_2d00_4698_2d00_bd07_2d00_d0c8697dae76PAUL MOLLOY's recent activityen-USTelligent Community 12https://communities.bentley.com/achievements/460ac7df-7ccc-4c42-a204-9e05eef3be09Wed, 03 Mar 2021 00:19:36 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:53e2f23a-1470-4eb5-bb07-94fbe7d17aecAsk a question in a forum.https://communities.bentley.com/products/3d_imaging_and_point_cloud_software/f/contextcapture-descartes-pointools-forum/210539/what-is-the-best-practice-for-assigning-control-for-achieving-the-most-accurate-photogrammetryWed, 03 Mar 2021 10:48:07 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:d6139209-f091-4711-90cc-d75234333cd6PAUL MOLLOY<p>Hi everyone,</p> <p>I have a question regarding control points and how many photos to assign control too.<br />I know the minimum is 3 photos for 3 different control points.</p> <p><br />I am processing photogrammetry for utility excavations and need the photogrammetry to be as accurate as possible.<br />If I have 500 to 800 photos for a piece of photogrammetry accompanied by 12 to 15 surveyed control points, how many of these control points should I use and how many photos should I assign control too?<br />Is it best to use all the control points assigning control to 10 to 12 photos for each control point?<br />Or is it better to assign less or more control to the photos for the different surveyed control points?<br />Is there a best practice for achieving the best quality and most accurate results?</p> <p>Any advice would be much appreciated.</p> <p>Thanks,</p> <p>Paul</p><div style="clear:both;"></div>