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Feature Request - Support for Lambert Conformal Conic Projection maps

Open scolebrook opened this issue 5 years ago • 5 comments

Air Services Australia produce many maps in LCC projection. It would be great if avitab could support that in addition to Mercator. Thanks for such an incredibly useful plugin.

scolebrook avatar Oct 12 '18 20:10 scolebrook

The problem with the Lambert projection is that selecting two points is not enough to calibrate an image - the user will also have to enter the so-called standard parallels and they vary from country to country. I'm not sure if this is widespread knowledge among pilots - would you know the standard parallels for your charts?

fpw avatar Oct 12 '18 21:10 fpw

For Australia at least, the standard parallels used are printed on the chart. They vary from chart to chart.

scolebrook avatar Oct 12 '18 22:10 scolebrook

Are they published online as PDF or did you scan them yourself? If PDF, maybe they are geo-referenced and I could just add that format. Do you have an example map?

fpw avatar Oct 12 '18 22:10 fpw

This is a Terminal Area Chart. https://www.airservicesaustralia.com/aip/current/aipchart/tac/tac1_24MAY2018.pdf

This is a high enroute chart. https://www.airservicesaustralia.com/aip/current/aipchart/erch/erch2_24MAY2018.pdf

This url will allow you to download other kinds of charts, some of which use Mercator. https://www.airservicesaustralia.com/aip/aip.asp?pg=60&vdate=24MAY2018&ver=1

scolebrook avatar Oct 13 '18 01:10 scolebrook

I know this is very old, but I've managed to generate slippy (EPSG 3857) from maps like this using QGIS. If anyone is still interested I can put together some instructions on how I did it.

oobayly avatar Nov 10 '21 16:11 oobayly