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Litchi: Heading doesn't match longitude

RoboticTundra

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If I have a waypoint with a longitude of -93.130449 and I'm doing 'Focus POI' on a POI with the exact same longitude but 50' north of the waypoint. I would expect the heading to be 0°. Yet it is listed as 355°.

I have a number of waypoints that share a longitude or latitude with their associated POI and yet the headings are 0°, 90°, 180° or 270° only about 50% of the time.

??

Thanks,
 
This is in Mission Hub. Examples:

WP.04 and POI.02 both have a longitude of -93.130799. I would expect WP.04 to have a heading of 180° but here it shows 178°.

Screen Shot 2018-05-17 at 6.06.21 AM.png

Next, WP.05, WP.08 and POI.03 all have a longitude of -93.130990. WP.05 has a heading of 176° and WP.08 a heading of 5°.

Screen Shot 2018-05-17 at 6.02.30 AM.png

WP.09 and POI.01 both have a longitude of -93.130649.

Screen Shot 2018-05-17 at 5.53.15 AM.png

Latitude's are similarly off. WP.01 has a heading of 269° and WP.02 is 268° while both s/b 270°. WP.07 is correctly 90°.

I had curves in but bad headings still exist with straight and WP.01 shouldn't have been impacted anyway.
 
I did also simple test setup:

WP 1 points to POI1
WP 2 points to POI2

The first leg (WP1-WP2) is exact North/South bound
The second leg (WP2-WP3) is exact West/East bound

POI 1 is on the exact longitude of the first leg.
POI 2 is on the exact latitude of the second leg.

Heading from WP1 to WP2 is exact 180°.
Heading from WP2 to WP3 is exact 90°.


Litchi_HeadingTest.jpg

Here the lat/long coordinates from WP2:

Bildschirmfoto 2018-05-17 um 13.58.28.png

Litchi is working as expected for me.
 
This is in Mission Hub. Examples:

WP.04 and POI.02 both have a longitude of -93.130799. I would expect WP.04 to have a heading of 180° but here it shows 178°.

View attachment 38118

Next, WP.05, WP.08 and POI.03 all have a longitude of -93.130990. WP.05 has a heading of 176° and WP.08 a heading of 5°.

View attachment 38119

WP.09 and POI.01 both have a longitude of -93.130649.

View attachment 38117

Latitude's are similarly off. WP.01 has a heading of 269° and WP.02 is 268° while both s/b 270°. WP.07 is correctly 90°.

I had curves in but bad headings still exist with straight and WP.01 shouldn't have been impacted anyway.

Perhaps you could post a link to that specific mission so that we can take a look.
 
Mission Hub - Litchi

Thanks. Didn't realize these were publicly accessible.

I'm not sure how you set that up, but the custom heading settings were the problem - perhaps you changed the POI coordinates after adding them. Anyway - if you reset the POIs at each of the waypoints (select a different POI and then back to the intended one), all the headings will be correct.
 
Thanks for figuring that out. I should have thought about trying that.

I never changed the headings. It wouldn't let me in POI mode. I did change Lat/Long once I got accurate info from the surveyor (who gave me 8 decimal places for 1.1mm accuracy).

Interestingly, if I change the longitude on WP.09 to -93.130500 it moves the WP but keeps the same heading and does not update it to stay fixed on the POI. If instead I drag WP.09 to the same approx location then it does adjust the heading.
 
Thanks for figuring that out. I should have thought about trying that.

I never changed the headings. It wouldn't let me in POI mode. I did change Lat/Long once I got accurate info from the surveyor (who gave me 8 decimal places for 1.1mm accuracy).

Interestingly, if I change the longitude on WP.09 to -93.130500 it moves the WP but keeps the same heading and does not update it to stay fixed on the POI. If instead I drag WP.09 to the same approx location then it does adjust the heading.

That does seem like a bug - updating coordinates of a POI should have exactly the same effect as dragging the marker. I'd suggest submitting a bug report.
 
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