Using decimal lat/long?
Printed From: Avidyne
Category: Avidyne General
Forum Name: IFD 5 Series & IFD 4 Series Touch Screen GPS/NAV/COM
Forum Description: Topics on Avidyne's IFD 5 Series and IFD 4 Series Touch Screen GPS/NAV/COM
URL: http://forums.avidyne.com/forum_posts.asp?TID=1105
Printed Date: 03 May 2024 at 3:58am
Software Version: Web Wiz Forums 12.01 - http://www.webwizforums.com
Topic: Using decimal lat/long?
Posted By: paulr
Subject: Using decimal lat/long?
Date Posted: 14 Jul 2016 at 9:08am
| I recently flew from the US to Canada. Because I thought it would be a one-time trip, I didn't buy the Jepp Canada packages. To get north of the border, I created user waypoints for the nav fixes and airports I expected to use. This was a mixed experience: the Nav Canada charts have conventional lat/long coordinates for some fixes, but others (like OAKVL) don't have them, and I could only get decimal lat/longs (e.g. 49.70º) from Foreflight. I didn't see a way to either make Foreflight give me conventional notation or to make the IFD take a decimal input. Is there a way to do this? |
Replies:
Posted By: ddgates
Date Posted: 14 Jul 2016 at 9:38am
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You can convert decimal components to minutes and seconds, e.g., 3.70 would be 3 minutes and 42 seconds. (decimal fraction x 60 seconds/minute). I did this before when a BK app gave me GPS coordinates in decimal but the box required minutes and seconds. Hope this helps. ------------- David Gates |
Posted By: M20J
Date Posted: 14 Jul 2016 at 4:40pm
| Interesting that you mention OAKVL. The OAKVL intersection was moved (by a few miles)a few years ago and it went from being an enroute intersection that was displayed on enroute charts to being an RNAV SID waypoint that you can find on the SID charts (with the decimal coordinates - dd mm.mm). Oddly, Foreflight still had both locations in their database, so using Foreflight, you risk getting the wrong location. The location of all waypoints in Canada can be found in the planning section of the CFS, which can be downloaded in Foreflight |
Posted By: AviJake
Date Posted: 14 Jul 2016 at 9:01pm
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The only formats the IFDs permit for position are: 1. ddd-mm-ss 2. ddd-mm.mm 3. UTM 4. MGRS ------------- Steve Jacobson sjacobson@avidyne.com |
Posted By: paulr
Date Posted: 15 Jul 2016 at 3:35pm
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The SID for CYTZ doesn't have the lat/long, at least in FF. Honestly it didn't occur to me to look in the CFS. I just now downloaded it and searched for OAKVL, and all I see are on pp1418 et seq, where it's referenced as part of the standard routes for the Toronto FIR. If I look at C191, where the list of intersection coordinates is found, OAKVL doesn't appear under the list of "O" intersections. So now I'm more confused than I was before; I still don't know how I should have gotten the lat/long for that intersection. |
Posted By: M20J
Date Posted: 15 Jul 2016 at 11:46pm
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I apologize, you are right, in the CFS they just have a list of enroute waypoints so OAKVL is not there as it is a SID waypoint. I just looked on Foreflight and the coordinates are in fact on the SID plates just as they are on the paper version. However I would not suggest you create user waypoints to"build" SIDs, STARs or approaches for IFR use. All those procedures should be loaded from the database so that the gps handles them correctly (cdi scale etc) and to avoid any accidental data entry errors. |
Posted By: paulr
Date Posted: 18 Jul 2016 at 7:53am
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Aha. I was looking at the wrong plate.If I go to the FF Plates tab, select CYTZ, select the OAKVL ONE DP, then the lat/long for OAKVL isn't shown. You have to go to the plate labeled "OAKVL ONE DEP (OAKVL1) DEPARTURE ROUTING" to see it. Thanks for pointing that out. The Nav Canada plates and schemes will take me a bit of getting used to. Your point about not hand-rolling DPs with user waypoints is well taken. However, it was hard VMC and I was able to get advisory guidance from FF, so I felt it was acceptable. I wouldn't try it in actual, however.
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Posted By: M20J
Date Posted: 18 Jul 2016 at 10:41am
| In FF you can move between plate pages by swiping with 3 fingers, that's the easiest way to move through the 3 pages of the OAKVL1. |
Posted By: JBSmitty
Date Posted: 21 Jul 2016 at 5:32pm
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In Foreflight, you can change the lat/Lon to DD-MM-SS to match the IFD format. Go to More/Settings Units/Time to make the change. ------------- Jim Smith, SR22 |
Posted By: AUXAIR
Date Posted: 21 Jul 2016 at 6:00pm
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Or you can set both ForeFlight and the IFDs to DD-MM.mm, which I find much easier to deal with.
------------- David E. Cessna 182 RG II |
Posted By: paulr
Date Posted: 21 Jul 2016 at 11:34pm
| This is the winning suggestion-- thanks! I didn't know you could do that in FF. |
Posted By: Mirslaw
Date Posted: 23 Apr 2019 at 1:20am
| I thought we were talking about Avidyne in this forum. Who cares about Foreflight? I don’t. |
Posted By: Catani
Date Posted: 23 Apr 2019 at 5:37pm
Well, there's one vote at least.
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Mirslaw wrote: