Exception when running example app

[ankelkoss]

lib>src>geojson_parser.dart : 307
Exception has occurred.
_TypeError (type 'int' is not a subtype of type 'double' in type cast)

before

for (final coords in path as List<dynamic>) {
   if (pathIndex == 0) {
     // add to polygon's outer ring
     outerRing.add(LatLng(coords[1] as double, coords[0] as double));
   } else {
     // add it to a hole
     hole.add(LatLng(coords[1] as double, coords[0] as double));
   }
}

after

for (final coords in path as List<dynamic>) {
      final double latitude = coords[1] is int ? (coords[1] as int).toDouble() : coords[1] as double;
      final double longitude = coords[0] is int ? (coords[0] as int).toDouble() : coords[0] as double;

      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));
      }
}

[jozes]

@ankelkoss

Hi,
the parser was programmed according to the RFC for GeoJson which states that the coordinates are defined by decimal numbers. Unfortunately a lot of programs which output GeoJson don't stick strictly to the definition and if one of the coordinates is decimal number with .0 at the end they omit that decimal and hence we have an integer.

However, I will consider changing parsing as you suggested. Two additional "if" statements will definitely degrade the performance slightly as this is the most frequently executed part of the parser.

Here is the part of the RFC definition:
3.1.1. Position

A position is the fundamental geometry construct. The "coordinates"
member of a Geometry object is composed of either:

o one position in the case of a Point geometry,

o an array of positions in the case of a LineString or MultiPoint
geometry,

o an array of LineString or linear ring (see Section 3.1.6)
coordinates in the case of a Polygon or MultiLineString geometry,
or

o an array of Polygon coordinates in the case of a MultiPolygon
geometry.

A position is an array of numbers. There MUST be two or more
elements. The first two elements are longitude and latitude, or
easting and northing, precisely in that order and using decimal
numbers. Altitude or elevation MAY be included as an optional third
element.