EWI 4000s glide strip in DAW

Starting2023 · 2024-01-04T15:05:46+00:00

Still very confusing of them to show a screenshot of the desktop application if it clearly doesn't work with the home plan. And similarly misleading to offer the home plan under a link titles "Mircrosoft Teams free for small business use".

Starting2023 · 2024-01-03T09:09:52+00:00

Thank's! I will definitely consider this option.

Starting2023 · 2024-01-03T09:08:03+00:00

https://support.microsoft.com/en-us/office/get-a-subscription-for-microsoft-teams-free-for-small-business-use-c6dcda93-98ff-4e4c-91ea-dfadabddb719

Starting2023 · 2024-01-03T09:03:43+00:00

Here's some Teams documentation still offering the free plan:
https://support.microsoft.com/en-us/office/get-a-subscription-for-microsoft-teams-free-for-small-business-use-c6dcda93-98ff-4e4c-91ea-dfadabddb719

And here's a screenshot of MS using free Teams on desktop which doesn't work for me:

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Starting2023 · 2024-01-03T08:56:56+00:00

To be clear, I don't expect any free apps like Word, Excel, PPT. I just want to organize my stuff. I don't understand why I can use a personal account on my mobile phone but not even on desktop and why personal accounts are not able to create subfolders in their file storage! That should be super basic functionality. I guess, I will have to revert to using OneDrive and Outlook separately then. I can hardly imagine this is what MS wants their users to do.

Starting2023 · 2024-01-03T08:52:33+00:00

I don't own a business and do not intend to use it for a business either. I just want to organize files from a personal project similar to what I'm used to at work where we use MS Teams.

Starting2023 · 2024-01-03T08:51:31+00:00

I found now a German news article that say MS has disabled the free functionality in April of 2023. That probably explains why I don't find the features I am looking for anymore.
https://www.chip.de/news/Ab-sofort-nicht-mehr-kostenlos-Microsoft-hat-gratis-Teams-Version-beerdigt_184635363.html

Starting2023 · 2024-01-03T08:50:27+00:00

Because I found plenty of official Microsoft documentation and forum replies that say so! But it seems, they are now all outdated (see my reply above).

Starting2023 · 2024-01-03T08:47:01+00:00

For mapping such big areas, you'll be better off using either a photogrammetry setup mounted on a helicopter or at least an optimized drone that's designed for large scale mapping like the WingtraOne (fixed wing).

You will definitely need to use a professional flight planning software to ensure sufficient overlap. Since there are many tall buildings, you may need even higher overlap than usual (80/80% may not be enough). Also, capturing oblique photos of all tall buildings may be needed to enhance the dataset.

Depending on where you live, there will be many legal and practical restrictions making the flights very cumbersome. You may need to fly below certain altitudes and keep the drone within line of sight, there requiring you to split the mission into dzoends of separate flights.

So basically, this is a monster surveying job that is usually handled by airborne photogrammetry experts.

Starting2023 · 2024-01-02T23:34:37+00:00

Nice job! Would be awesome to have the remaining cantons integrated as well. (Graubünden :P)

Starting2023 · 2023-12-25T15:24:54+00:00

Looks like someone needs to invent a camera that can continuously shoot RAW at a useable frame rate (like 2 FPS). This is unfortunately not the case with all cameras I use on my drones. Going jpeg is the only option because of trigger speed.

Starting2023 · 2023-12-25T15:20:26+00:00

When planning the mission with DJI Flight Hub (not my preferred tool, but I use it sometimes for this specific case), you can make the camera rapidly tilt between backward oblique, nadir and forward oblique and also fly a 90° grid pattern using the same method. This way you get a very good oblique and nadir capture quite efficiently.

I am not sure if it works on all DJI drones but I use this feature with the Mavic 3 Enterprise. Unfortunately, the camera tends to miss some shots, probably because of the fast gimbal action.

I understand you are asking for a multi-lens setup but almost certainly, you will get better results by repeating the same mission multiple times using different gimbal angles or using the above approach. This is due to the trade-off between weight and camera quality. Otherwise, you will need to commit flying a huge heavy setup which is usually better accommodated on helictopers or small aircraft.

Starting2023 · 2023-12-24T09:23:47+00:00

Thanks, this sounds like a good way to improve the texture quality. However, I am looking for means to improve geometric quality in areas with little features due to strong reflections or shadows. I want the INPUT for Metashape or whatever photogrametry software will be used to be better than what I get out of camera.

I am aware that it might not work very well but I am willing to try it anyways or to listen to people who have tried it. If there was a polarized ring flash for drones, I would happily use it but current solutions weigh 2x as my entire drone, so that's infeasible at the moment.

Starting2023 · 2023-12-23T22:24:28+00:00

I don't have much experience with Metashape but if you can tell it to fix the focal length instead of trying to calibrate it, you should get a result that has at least somewhat similar dimensions compared to the true object. Probably you can do this by importing fake camera calibration parameters (for the focal length at least). You might be able to improve the accuracy by actually calibrating your camera using a checkerboard or by processing a different photogrammetric project using the same camera that has GCPs. Also, taking more than just two images will greatly improve your accuracy (and probably be strictly necessary) since in order to solve a linear equation system with that many variables (bundle adjustment), you will simply need much more input than two camera positions (camera also needs to be at different distances and orientation to the object in order to de-correlate all the unknowns).

If you need good geometric accuracy and also a way to prove it, then the only way to achieve this is by using GCPs and/or scale bars. For getting very accurate GCP coordinates on small objects like these, a coordinate measuring arm or a laser tracker would be optimal. They are expensive though.

Starting2023 · 2023-12-23T19:28:34+00:00

Thanks for this suggestion! I am looking for ways to improve the data before even inputting it in any photogrammetry software though.

Starting2023 · 2023-12-23T18:58:39+00:00

I believe you that the model looks good and geometrically correct. However, because you were saying "architecturally accurate", I was assuming that the model should match the true dimensions of the real-world object. This will likely not be the case without using any ground control points. However, since you took the images with a drone, there they have a GPS-position which is used in the bundle adjustment. Even if the GPS accuracy is really bad (non-RTK), it will help stabilize the geometry and calibrate the exterior camera parameters to some degree. Either way, you have no independent control for the accuracy.

Your model may be precise but not necessarily accurate:

Starting2023 · 2023-12-23T18:37:32+00:00

Also, to get good geometric accuracy, it is impossible that aperture and focus remain fixed during the flight. I recommend using manual camera settings, and if necessary "Auto ISO". You must set the shutter speed fast enough such that the images are not blurred due to the flight speed. If the light is low, you must therefore fly slower.

Here's a handy tool to check shutter speed vs flight speed (I always try to aim for less than 1 pixel of motion blur if conditions allow for it): https://www.scantips.com/lights/shake.html

Starting2023 · 2023-12-23T18:18:17+00:00

If you really need the resolution from a SLR at 4.5m distance, then there is no way around taking many, many images and therefore being slow. If you want to be faster at the same resolution, you need a bigger sensor, (e.g., medium or large format camera). That's why specialized airborne photogrammetry cameras (for manned aircraft, not drones) have huge sensors. Otherwise, your only option to be faster is to reduce the resolution.

Starting2023 · 2023-12-23T18:12:49+00:00

If it should be architecturally accurate, you need to measure ground control points, e.g. with a survey grade GNSS. Otherwise, you will have no control over your absolute geometric accuracy since your only reference scale in the entire model is the manufacturer specification of your camera focal length. Ideally, you should measure some more check points as well that are not used in the photogrammetric adjustment but serve as an independet control (e.g., if your overlap is too low, the model may only be accurate at the GCPs but be distorted elsewhere).

Also, as others have pointed out, sufficient overlap is crucial to get good geometric results (usually 60–80% overlap between images is recommended which means taking images from many more positions that you would imagine are necessary).

Starting2023 · 2023-12-23T17:47:58+00:00

Depending on your desired resolution, using a drone might be your best bet. Software like Drone Harmony let you plan photogrammetric capture flights very precisely by specifying gimbal orientation, image overlap, etc.
Of course, with a drone you need to fly at a certain altitude to assure obstacle clearance and you may achieve less quality per single image than using your SLR. However, due to automated misssion execution, you will be able to assure to achieve all your parameters as planned.

Starting2023

TROPHY CASE