jifalops / dart-latlong Goto Github PK

I don't know if it would be outside the scope of this library, but I have situations related to flutter_map where I grab the LatLngBounds of FlutterMap-view to filter vector data from a source and would like to load a bit more than just the viewport so if user pans around a bit, it is already loaded, but also not loading the entire world.

For that something that can grow LatLngBounds in all directions would be helpful. Although I understand it then becomes a matter of what projection is used, distance units and might make it to complicated for the scope of this library? But for my use case even just growing it by X % would be enough as it is not a precise buffer operation, just to manage buffering of data.

Add constructor to a LatLng object to allow initializing object from Degree Minutes Seconds (DMS).

eg:

var p1 = LatLng.fromDMS(.....),

Because vector_map_tiles >=5.0.0 depends on latlong2 ^0.9.0 and szwtracktrace depends on latlong2 ^0.8.0, vector_map_tiles >=5.0.0 is forbidden.
So, because szwtracktrace depends on vector_map_tiles ^6.0.2, version solving failed.

Upraded latlong2 to ^0.9.0. Now I get the following:

Because vector_map_tiles >=5.0.0 depends on flutter_map ^5.0.0 and szwtracktrace depends on flutter_map ^6.0.1, vector_map_tiles >=5.0.0 is forbidden.
So, because szwtracktrace depends on vector_map_tiles ^6.0.2, version solving failed.

Is calculating the bearing between two points within scope of this library?

Is it implemented?

If not, is there a known algorithm that will accurately calculate the bearing between two points?

Use case: I'm standing at point A, what compass bearing should I use to walk in a straight line to reach point B?

the longitude's second number is one higher than expected
I tested by putting the input into google maps -> correct
output into google maps -> off by a bit
then created by own calculator and that was it

`: Error: The parameter 'center' can't have a value of 'null' because of its type 'LatLng', but the implicit default value is 'null'.

• 'LatLng' is from 'package:latlong2/latlong.dart' ('/Users/myname/.pub-cache/hosted/pub.dartlang.org/latlong2-0.8.1/lib/latlong.dart').
  Try adding either an explicit non-'null' default value or the 'required' modifier.
  LatLng center,
  ^^^^^^
  /Users/myame/.pub-cache/hosted/pub.dartlang.org/flutter_map-0.14.0/lib/flutter_map.dart:294:18: Warning: Operand of null-aware operation '??' has type 'LatLng' which excludes null.
• 'LatLng' is from 'package:latlong2/latlong.dart' ('/Users/mynamme/.pub-cache/hosted/pub.dartlang.org/latlong2-0.8.1/lib/latlong.dart').
  }) : center = center ?? LatLng(50.5, 30.51),`

the limitation causes at least the following issues with flutter_map
fleaflet/flutter_map#468
fleaflet/flutter_map#1201
fleaflet/flutter_map#1338
fleaflet/flutter_map#1452
fleaflet/flutter_map#1582

It is a regressed issue on Firebase Crashlytics with the following details.

Non-fatal Exception: io.flutter.plugins.firebase.crashlytics.FlutterError: Unsupported operation: Infinity or NaN toInt. Error thrown null.
at Distance._round(Distance.dart)
at Distance.as(Distance.dart:83)

It is used with the Haversine calculator

Tthis library can calculate the distance between two points:

final Distance distance = new Distance(calculator: Haversine());
distance(
    LatLng(x1,y1),
    LatLng(x2,y2),
);

How to calculate the distance from point (LatLng) to the route line (LineString: List)?