Calibration now requires the user enter 3 datapoints. The first 2 datapoints are lat/lon as normal.
The 3rd datapoint can be either another lat/lon, or an angle, representing the offset from North on the chart. The 3rd datapoint text field is prefilled with '0', as a default angle for typical North up charts.
Avitab can also now get calibration metadata from a .kml file, saved from Google Earth after a chart has been georeferenced via Image Overlay.
A more complex set of 2D linear equations have been implemented to represent the 2D matrix operations for the Rotate/Translate/Scale transformations between pixel and world coordinates. Added more logging and reporting of calibration success/failure.
I've added some code to hopefully ensure this still works with Navigraph, but am unable to test.
fpw
commented
1 year ago
Calibration now requires the user enter 3 datapoints. The first 2 datapoints are lat/lon as normal. The 3rd datapoint can be either another lat/lon, or an angle, representing the offset from North on the chart. The 3rd datapoint text field is prefilled with '0', as a default angle for typical North up charts.
Avitab can also now get calibration metadata from a .kml file, saved from Google Earth after a chart has been georeferenced via Image Overlay.
A more complex set of 2D linear equations have been implemented to represent the 2D matrix operations for the Rotate/Translate/Scale transformations between pixel and world coordinates. Added more logging and reporting of calibration success/failure.
I've added some code to hopefully ensure this still works with Navigraph, but am unable to test.