dart: Flutter web gives completely wrong results when decoding polyline

[cedrichansen]

Decoding polylines on flutter web is completely wrong.

Using the provided example from https://pub.dev/packages/flexible_polyline, running on android works just fine and prints out the expected results

List<LatLngZ> decoded = FlexiblePolyline.decode("BFoz5xJ67i1B1B7PzIhaxL7Y");

results in the following on android/ios

 LatLngZ [lat=50.10228, lng=8.69821, z=0.0]
 LatLngZ [lat=50.10201, lng=8.69567, z=0.0]
 LatLngZ [lat=50.10063, lng=8.6915, z=0.0]
 LatLngZ [lat=50.09878, lng=8.68752, z=0.0]

But running the exact same code with flutter web gives the following:

LatLngZ [lat=50.10228, lng=8.69821, z=0]
LatLngZ [lat=21524.93849, lng=21483.53215, z=0]
LatLngZ [lat=42999.77359, lng=42958.36446, z=0]
LatLngZ [lat=64474.60822, lng=64433.19696, z=0]

The first address is correct, but subsequent addresses 2-4 are very large
If there are any additional params/options available that fix the decoding scheme based on web vs mobile, that would be an acceptable workaround until a better solution can be found

[ichsan210]

i have same issue, is the problem have fix?

[cedrichansen]

I have not found a fix using this package. I have switched to a completely different method, specifically, calling a server of mine which is responsible for getting directions/polyline, using google maps, and communicating that result via http. Not my favourite work around, but it works well for my use case

[VeaaC]

Sounds a bit like #52