jozes / flutter_map_geojson Goto Github PK

Hey, great package!

Using leaflet I get the bounds of a geojson using the getBounds() method.

https://leafletjs.com/reference.html#map-getbounds

Used like this

map.fitBounds(geojson.getBounds());

I was wondering if this package supports something similar?

Cheers,

Alex

for example, i am using the world data from here to draw country borders https://datahub.io/core/geo-countries coutries.geojson,
Next i am using your plugin to parse thedata

  Future<void> startParam() async {
    osmController = MapController();
  
    final data = await rootBundle.loadString('assets/countries.geojson');

    myGeoJson.parseGeoJsonAsString(data);
    setState(() {});
  }

and using it normally in the flutter_map in polyline

  PolylineLayer(
                    polylines: myGeoJson.polylines,
                  ),

nothing happens there was a error initially in ur plugin regarding exceeding the lat lan value being under 180 so, updated your code as such

 case 'MultiPolygon':
          {
            for (final polygon in f['geometry']['coordinates'] as List) {
              final List<LatLng> outerRing = [];
              final List<List<LatLng>> holesList = [];
              int pathIndex = 0;
              for (final path in polygon as List) {
                List<LatLng> hole = [];
                for (final coords in path as List<dynamic>) {
                  double latitude = coords[1] as double;
                  double longitude = coords[0] as double;
                  if (longitude > 180) {
                    longitude = longitude - 360;
                  } else if (longitude < -180) {
                    longitude = longitude + 360;
                  }
                  if (pathIndex == 0) {
                    // add to polygon's outer ring
                    outerRing.add(LatLng(latitude, longitude));
                  } else {
                    // add it to a hole
                    hole.add(LatLng(latitude, longitude));
                  }
                }
                if (pathIndex > 0) {
                  // add to polygon's list of holes
                  holesList.add(hole);
                }
                pathIndex++;
              }
              polygons.add(polygonCreationCallback!(outerRing, holesList,
                  f['properties'] as Map<String, dynamic>));
            }
          }
          break;
      }

i don't get any results or update, what am i missing here .? could u give it a try ?

Is it possible to color code the terrain based on this plugin? For example is the terrain is at your current altitude then color code it red, if the terrain is below 500 feet then color code it yellow, and if below thousand feet then color code it green ?

I need to filter data according to filter name. I cannot do it directly because the plugins directly parse the data

Latest flutter_map package contains a lot of bug fixes and improvements

Just checking out your library here! Cool stuff. I don't see onTap/press for Polygons. Am I missing it? Thanks!

Hi,

Thank you for the great library.
I attached a complex Geojson, which also has coordinates and other types such as description and so on; do you think your library supports those?
mygeodata.zip

I want to get the polygon properties even in string format. Is it possible to do this?

Hello!

Thanks for this code. I'm having an issue while reading some geojson. Here is a screen capture that documents the issue:

As you can see, the selected point contains an int in the coordinates and the conversion assumes they are double value.

Hello, I encountered a crash problem
There are strange lines, and it will crash if you zoom in.

I put the wrong question. Sorry.

The next version of flutter_map is coming soon, with breaking changes for all users and plugins!

Expected CHANGELOG: https://github.com/fleaflet/flutter_map/blob/release-prep/CHANGELOG.md
Likely to be merged PR with significant impacts: fleaflet/flutter_map#1615
Release prep PR: fleaflet/flutter_map#1632
New documentation (path liable to change): https://docs.fleaflet.dev/v/v6-1
Expected migration instructions, suitable for most users: https://docs.fleaflet.dev/v/v6-1/getting-started/migrating-to-v6
List of commits since v5 (more to come): fleaflet/flutter_map@v5.0.0...master

in geojson corrdination value
[
[
212.1079454740286,
56.97082786802997
],
[
224.46248916782633,
64.50936114954698
],
[
245.94986061613014,
75.8975769875282
],
[
13.041330817213094,
77.07190622818226
],
[
212.1079454740286,
56.97082786802997
]
]
when it convert to latlng its give an error because latlng range is
Latitude is specified in degrees within the range [-90, 90]. Longitude is specified in degrees within the range [-180, 180).
how we can handle this json

Thank you for your work. It is really helpful, but I have some geojson data which sometimes contains coordinates like [10,47.7875]. The first value is not a double value; therefore, the casting e.g here:

type 'int' is not a subtype of type 'double' in type cast

Expected behavior:
Correct parsing of non-double coordinates.

I want to check whether my car is in the position of the polygon drawn on the map or not.
When the position of my car is inside the polygon, the color of the polygon becomes blue and when it leaves the polygon, it changes color to red

In short, how can I change the color of each polygon after the map is fully loaded?