However, the benefit of RTK/PPK image geotags is that you can reduce the number of GCPs collected for a given project. In general, the best practices would still require the use of GCPs and checkpoints to meet proven absolute accuracy standards. To what extent they can replace GCPs as a means for high accuracy in mapping is not thoroughly understood. RTK/PPK geotags in consumer drones is a relatively new technology and the workflows for using them have not yet been clearly defined in the industry. The last resort would be to correct the shift by including GCPs in the project. broadcast ephemeris data (precise satellite navigation data) - this acounts for orbital errors and should be reliable.the base station file (rinex data from a fixed base station) - this should be as close to your study area as possible.the rover file (rinex data from the drone) - ensure there was no strong wind that induced vibrations to your drone.If you are getting some shifts, I would suggest first double-checking the PPK correction process and make sure the appropriate data was chosen: In the end, you are dealing with image datasets that have highly accurate geotags, only their origin differs. The processing workflow for RTK should be similar to PPK. In fact is not reading Omega / phi / Kappa values.ĭoes anyone know how make it read these data and not entering by hand one by one ? In order to get more calibrated camera, I can recommend you the following: Menu Process > Processing Options > 1. I recommend you this article to understand better the cause of this: Quality Report Help. Sunlight sensor equals the lighting conditions during one measuring flight, while reflectance panel flatens differences in sunlight spectrum from one measuring to the next.Hi, when i import images taken from a P4RTK it read the location but accuracy is 5m/10m regardless of i click on “Standar”, “low” or “custom” geolocation accuracy. Hi, I reproduce here a comment that I did: Uncalibrated-cameras. Panel and sunlight sensors don't do the same things. Yes, we work with reflectance panels - in the rare time when we have a link between drone and rc. The only suggestion I could find that folks on the manufacturing end were thinking that we can get away without a reflectance calibration target was in the MicaSense Rededge FAQs (I paraphrase): Wondering if anyone has info regarding reflectance calibration workflows with the P4 MultiSpec camera array? The P4 MultiSpec has an on-board sunlight sensor, however with other MultiSpec sensors a reflectance calibration target tarp/board is still required, and formal research published on the topic pretty much demands the use of a reflectance calibration target for reproducible and thus comparable results. Is the P4 multiSpec sunlight sensor so amazing that reflectance calibration target board shots are of no additional value to the workflow? Would the accuracy/reproducibility of the imagery be better if reflectance calibration target board shots are incorporated into the workflow?ģ. Is a reflectance calibration target board/trap recommended for this sensor array?Ģ. So the questions (and I ask the same thing in a couple of different ways purely to ensure clarity):ġ. This is the difference between the local coordinate system in which some of the outputs are created and the output coordinate system. It can be used for the textured mesh (.obj file) and densified points cloud (.ply and. Although in he future we hope to develop the DSL sensors so the reflectance calibration target board shots are not required.' It contains the offset between the centered points and the output coordinate system. 'Q: if I use a sunlight sensor (DSL) do I still need to take reflectance calibration target board shots? A: Yes. The only suggestion I could find that folks on the manufacturing end were thinking that we can get away without a reflectance calibration target was in the MicaSense Rededge FAQs (I paraphrase): Wondering if anyone has info regarding reflectance calibration workflows with the P4 MultiSpec camera array? The P4 MultiSpec has an on-board sunlight sensor, however with other MultiSpec sensors a reflectance calibration target tarp/board is still required, and formal research published on the topic pretty much demands the use of a reflectance calibration target for reproducible and thus comparable results.
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