• Best practice and settings when running a photogrammetry project with drone photos including basic GPS data and survey grade GCP:s?

    I've been searching the forum and read all the manuals avalible for Context Capture Master and the process of aerotriangulation and productions of orthophotos. But I'm still uncertain on how the process should be conducted in order to achive best result…

  • Recommended number of control points - control point density

    I'm desperately searching for a page I've recently seen on the forum (or was it the Wiki?), describing the maths and process on how to determine a good distance between GCP;s on a large land survey project. - Is there anyone out there who know what…

  • Surveyed Ground Control measurements and there reuse with a different SRS

    For our ContextCapture projects we have two customers. One customer needs Nad83(2011) NCSP NAVD88 Geoid 18 (xyz units us survey foot), the other customer needs Local Space Rectangular. The difference between the two SRS's is normally a scale factor. Knowing…

  • Keypoints and control points

    HEllo good CC community, This is a question I've been wanting to ask for a while, Although I'm very familair with the concept of Keypoints and control points, every time I try to generate keypoints and control points to actually give scale to…

  • What is the best practice for assigning control for achieving the most accurate photogrammetry?

    Hi everyone, I have a question regarding control points and how many photos to assign control too. I know the minimum is 3 photos for 3 different control points. I am processing photogrammetry for utility excavations and need the photogrammetry to…

  • What size do April Tags need to be?

    I created a project. I went to Tools and saw that April tags need to be at least 35x35 pixels. If I am flying a job with a Phantom 4 RTK at an altitude of 71m AGL that gives me a GSD if 1.95 cm/px If we calculate that out to 35px by 35px that gives us…

  • VLP-16 LIDAR with KAARTA integration into Context Capture

    My school is undergoing a campus modeling project and we only have a cheap VLP-16 LIDAR puck scanner that we have been able to use and process through KAARTA. Because of the minimalistic setup, there is no GPS on the unit and no geographical reference…

  • Why does my focal length change for the same camera in different photogroup?

    I'm using Sony A7R II with 28mm lens and I'm curious why my focal length change slightly? it's a prime lens and manufacturer spec says it's 28mm and the aero-triangulation optimized the focal length in the range of 27.13mm - 27.20mm for different photogroups…

  • Data required for Context Capture

    I am using high definition RGB oblique and nadir imagery without GPS or roll/pitch/yaw data. Will context capture successfully stitch imagery to form the mosaic mesh model? We aren't using LiDAR due to a lack of geographic relief for this particular problem…

  • ContextCapture 3SM concave elevations

    I used a DJI Inspire 2 w/X4S camera to obtain nadir and 45 deg oblique imagery in both directions for the use of reality modeling in ContextCapture. Extensive ground control was placed and recorded to constrain the model. After running a quality check…

  • contextcapture Control point&Checkpoint

    用contextcapture軟體 要點 Control point Checkpoint 是否可以直接 搜尋 施測 座標的位子 讓點 Control point Checkpoint 速度更快一點。 不需要一張一張照片尋找 Control point Checkpoint所在的位子 請問是否有跑Orthophoto(tiff檔案) 的步驟 我跑出來都是黑色圖片

  • GCP Error & KML Constraint Fix

    Hello all, After a lot of trial and error, we managed to produce a 1.2sq km model of Downtown Dubai but we still face a couple of challenges with regards to GCP's and using the KML Polygon for the water surface as you can see below. During the AT…

  • SIG Virtual Workshop: Bentley Reality Modeling - May 15, 2018 - You're Invited!

    Learn about all the latest features of ContextCapture at the next complimentary Bentley Reality Modeling Special Interest Group virtual workshop on Tuesday, May 15, 2018 at 9 a.m. CET. Register today ! This interactive, one-hour session is a great forum…

  • D-RTK GNSS in Context Capture

    Hello, Does CC support D-RTK GNSS by DJI A3 series flight controllers ?? The reason I'm asking is simply...normally we use control points for our aerial imagery but this time we want subcontractor to do the hard work and provide us with aerial photos…

  • Why do I lose marked GCPs during AeroTriangulation?

    I've imported photos from a DJI Phantom 3 and performed an AT on them, it works OK except for a bit of radial distortion. I then bring in and mark my ground control and do another AT using the setting 'Use control points for adjustment', but after AT…

  • Having Problems with Control Point Import

    Hallo! I am having big problems with importing Control Points in ContextCapture via Control Points Editor. Please check my Attached TXT file where I have GCPs from Local Survey team. Software does not want to import them. I have tried several formats…

  • Combine point clouds and photographs in ContextCapture

    Hello. I have a problem importing point clouds in ContextCapture.My task is to combine photos and scannings from Faro Focus 3D X330. I have taken GCPs with ASHTECH(i use same GCPs to photographs and to scannings). I first made the Aerotriangulation to…

  • control point ContextCapture

    Hi! I'm testing the accuracy of the photogrammetry process. So I use GCP and check point (CP). When I use only GCP the aerial triangulation's error is not relevant and the result is good but when i use GCP and CP the CP's error is higher than GCP's…

  • Control Points - ContextCapture

    I need to introduce Control Points in ContextCapture. How I can import a list of coordinates X,Y,Z from .txt file?
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