New answers tagged gps
6
After some searching it seems that "kinematic" comes from the original application of land surveying, where kinematic surveying seems to mean that one measurement station is continously tracked while moving [1][2].
3
You may also use APPS (https://pppx.gdgps.net/)
It's a technology from NASA's Jet Propulsion Laboratory and they use there own GipsyX/RTGx software for processing the GPS measurements.
0
What you can do is averaging out the coordinates of all four points. Geometrically it will give you the center of your trapezoid, and your rectangle.
P_x = (BL_x + BR_x + TR_x + TL_x)/4
P_y = (BL_y + BR_y + TR_y + TL_y)/4
1
This thread on the GPSTest Google Group discusses this topic:
https://groups.google.com/g/gpstest_android/c/uT2fmvu7ktA
That thread lists several apps, although I don't know if any of them have definitively proven sub-meter accuracy:
PPP WizLite : by the French Agency, app pulled from Play Store for unknown reasons but still available on repo sites like ...
0
On Android you can use Apps to mock positions, so you have the external GPS as internally for all Apps.
Unlock developer settings and select your (previously installed) App for mock GPS positions there.
rtklib is useful, if you want to handle NTRIP on the device, if you get corrected postitions via NMEA already (GSM + NTRIP handled by GPS receiver).
If you ...
1
An application like EXIFTool will allow you to see the pitch, roll, and yawl for both the camera and the aircraft. There are also Python solutions for reading the EXIF data from the aircraft camera such as PILLOW. Some data may be stored in the XMP tags. XMP tags can also be extracted from images using this library.
I have developed Python code to do ...
1
At the moment, this is not possible just like that.
You could take a list of points and connect them to lines in a post processing step. And already visualize them as lines on QField using a virtual layer.
It would be possible to extend QField to store a (limited amount of) data in the m value per vertex. Or edit two layers in parallel. These are more ideas ...
0
With the recent changes to Android, you may have difficulty attaching EXIF information to photos from the external app.
As a work-around, I suggest using the Input app: https://inputapp.io which is based on QGIS, available for Android and iOS and directly supports reading and writing EXIF data from/to photos.
Simply, set up a project in QGIS and add an ...
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