Not all tiles are loading if i use Zoom Levels like 14.7

[eazy2x]

1st, forgive me if the problem is on my side, still new in programming/flutter.

I am trying to build a Map view, which whereever you are (Latitude - north/south) always displays the same distance (in meter) on the screen, with fixed zoom Level. Seeing that Zoom Level ist a double, i thought, cool no big deal, but now if i set it to 14.7 as an example this happens:

The tiles at the corners wont load until you move a bit closer to them in the map view, any way to trigger them loading a bit earlier or maybe fix that (if thats really an "issue")?

Oh and i use Mapbox, 'mapbox.dark', dont mind the Hexagons on top of the map they are markers.

[johnpryan]

This looks like a bug to me, do you have a lat/long and and size to reproduce the issue?

[ibrierley]

Reminds me a bit of this bug #525 but I think the latest version superceded, but that code is still in there if someone else is using it.

…

On Mon, Apr 27, 2020 at 11:51 PM John Ryan ***@***.***> wrote: This looks like a bug to me, do you have a lat/long and and size to reproduce the issue? — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#605 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AA5YN5LNOSFWGVBG4BGKRB3ROYD6VANCNFSM4MSKH6AA> .

[eazy2x]

This happens anywhere, anytime (if you havent cached the map arround) but just with 14.7 zoom set (zoom, maxzoom and minzoom) i noticed it. Some decimals like 15.2 work fine, seems only the last bit until you reach the next Level? This example anyway is at LatLng(64.137125, -21.902071); (iceland)

Might also be different depending on phone screen size/ratio? I am using Nexus 6 api 28 for the emulator.

[ibrierley]

I have a pull request in that link above, it's only one tiny change in a file you could temp try and then restore to original. It would be interesting to see if you can try it and see if it helps at all. Ian

…

On Tue, Apr 28, 2020 at 8:30 AM eazy2x ***@***.***> wrote: This happens anywhere, anytime (if you havent cached the map arround) but just with 14.7 zoom set (zoom, maxzoom and minzoom) i noticed it. Some decimals like 15.2 work fine, seems only the last bit until you reach the next Level? This example anyway is at LatLng(64.137125, -21.902071); (island) Might also be different depending on phone screen size/ratio? I am using Nexus 6 api 28 for the emulator. — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#605 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AA5YN5O6OHGWWZLMRL5LEYTRO2A2RANCNFSM4MSKH6AA> .

[eazy2x]

sorry accidently closed

[eazy2x]

i tested 0.8.2 now (changed yaml file/pub get) which should revert that (and other stuff) but same issue, using 14.7 zoom wont load tiles if they are at the edges of the screen.

[ibrierley]

any way for you to have a minimal example that breaks it that people could try ?

[eazy2x]

Basicly used the "on_tap" page in examples, using that and set all zoom levels to 14.7 should do the trick. And i removed AppBar, even hide status bar, not sure if that has an effect (but even sides left/rigth wont load if it's just a bit in the screen)

[ibrierley]

Have you tried 0.9.0 ?

…

On Tue, Apr 28, 2020 at 9:32 AM eazy2x ***@***.***> wrote: Basicly used the "on_tap" page in examples, using that and set all zoom levels to 14.7 should do the trick. — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#605 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AA5YN5I4MHQHIUKREIKBRNLRO2IABANCNFSM4MSKH6AA> .

[eazy2x]

did some testings:

it is worst at 14.5 getting better slowly until 15 is fine. Then 15.0 - 15.49 has no problem at all (same as 14.0 - 14.49 has no issue)

so just the .5 to .99 range is causing the problem

[eazy2x]

Have you tried 0.9.0 ?
…

sure, before i used "any" so should have been, going back to 0.8.2 was my quick way to test the package before your pull (checked dates) as i have no clue how to change it manually.

[ibrierley]

Works fine for me at that zoom level 14.7, but may be you need to be more specific with the code changes (latlngs and if it's just the flutter_map zoom to 14.7 or whatever) to replicate.

…

On Tue, Apr 28, 2020 at 9:44 AM eazy2x ***@***.***> wrote: Have you tried 0.9.0 ? … <#m_-5830518606377145422_> sure, before i used "any" so should have been, going back to 0.8.2 was my quick way to test the package before your pull (checked dates) as i have no clue how to change it manually. — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#605 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AA5YN5KTE5SG2T6CAAUKK5LRO2JP7ANCNFSM4MSKH6AA> .

[eazy2x]

oh and i think it depends on the latitude you are on, swapped to Singapore (near 0) and at 14.5 i have barely an issue (just a tiny bit), so issue seems to come with the stretch factor of the map, going nort/south

the very problem i am working on right now (to show fixed size window with same meters)
working formulas i foud here:
https://gis.stackexchange.com/questions/110730/mercator-scale-factor-is-changed-along-the-meridians-as-a-function-of-latitude