Bug 57270 - UWP map custom renderer ignores custom icon and mapspan
Summary: UWP map custom renderer ignores custom icon and mapspan
Alias: None
Product: Forms
Classification: Xamarin
Component: Windows ()
Version: 2.3.4
Hardware: PC Windows
: Normal normal
Target Milestone: ---
Assignee: Bugzilla
Depends on:
Reported: 2017-06-08 10:59 UTC by NMackay
Modified: 2017-06-21 13:25 UTC (History)
2 users (show)

Tags: ac, uwp, map, mapspan, pins
Is this bug a regression?: ---
Last known good build:

PCL UWP demo project (109.76 KB, application/x-rar)
2017-06-08 10:59 UTC, NMackay

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Description NMackay 2017-06-08 10:59:15 UTC
Created attachment 22773 [details]
PCL UWP demo project


This bug repo highlights three issues that exist in the UWP map renderer

1) If you change the map marker icon in the renderer the existing marker icon remains although the new asset is shown also, intermittent since 2.3.3 when we 1st wrote this renderer.

2) The mapspan is been ignored (appeared in 2.3.4)

3) If you rotate the map the app crashes, comment out the following line in the renderer:

_nativeMap.RotateInteractionMode = MapInteractionMode.Disabled;

Tested on Nokia Lumia 650, OS build 10.0.15063.297
Windows SDK: 10.0.14393.0

As it stands the map control is pretty unusable for us in UWP at present.

Comment 1 Jimmy [MSFT] 2017-06-08 18:52:06 UTC
Hey Norman, thanks for filing this! I was able to reproduce all three issues with

Fortunately I did notice some improvements when testing with 2.3.5-pre3:

- The rotation crash seems to be resolved
- The MapSpan seems to now work intermittently 

As for the map marker issue, I think what is happening is that unlike on iOS or Android, if multiple markers are placed at the same coordinates in the UWP they will all be visible instead of only the topmost.

However I'm not sure if this is a platform issue or something we can fix on our end. But in the meantime, a quick workaround for this is to only add the pin to your custom pin collection and _not_ the Forms Map collection on UWP. This will prevent the default pin from being added to the control.

I'll confirm this report so we can look further into the map span and marker issues. Thanks!
Comment 2 NMackay 2017-06-08 19:16:19 UTC
Thanks Jimmy
Comment 3 NMackay 2017-06-12 09:27:08 UTC
Hi Jimmy,

Thanks for the custom pins tip, I can confirm that resolves the duplicate marker issue.

The mapspan is the main blocking issue now.

Comment 4 NMackay 2017-06-14 12:18:17 UTC
I can confirm I'm seeing better results with mapspan in 2.3.5 pre3.