Sota Activation Zone Estimate LA/HM-132 ISSUE

[esplien]

GEOMETRYCOLLECTION(GEOMETRYCOLLECTION EMPTY,POINT(NaN NaN)) ? What can cause this problem?

73 de Espen LA1RQ

[eheinrich]

Thanks for the report!

I was able to recreate this issue. Steps that I took to reproduce:

• Enter "LA/HM-132" into the SOTA REF input box
• Click the Plot AZ button
• Wait for the result of the computation. The result is GEOMETRYCOLLECTION EMPTY which I believe means that an area was unable to be generated for the input parameters. At this point the map disappears since the plotting software errors out on trying to plot an empty collection.
• Click on the area of the screen where the map was located. Even though the map isn't displayed anymore, the HTML elements that are used the display the map are still present, and the click handler that adds new points to the GEOMETRYCOLLECTION upon clicking the map is still active. Because of this, clicking that empty map area results in a new POINT(NaN NaN) being added to the collection.

So I would say that the POINT(NaN NaN) that you're seeing is a UI bug - we probably shouldn't be adding NaN points onto the collection. Note that you'll see this behavior any time the result is GEOMETRYCOLLECTION EMPTY.

As for getting the result of GEOMETRYCOLLECTION EMPTY in the first place for the "LA/HM-132" input, that result came from the azgen API. Not sure about the details of the computation that happens there and why we were unable to compute this specific summit. I'll let @arkorobotics comment on that.