Merge pull request #44 from wingkwong/develop

Release: 0.10.2

Author: wingkwong

CHANGELOG.md

@@ -1,5 +1,10 @@
 # CHANGELOG
 
+## 0.10.2 
+
+- Fixed Shoelace formula
+- Added Unit Conversion
+
 ## 0.10.1
 
 - Added Example README.md 

lib/src/core/GeodesicMeasurements/polygon_area_by_points.dart

@@ -25,8 +25,8 @@ class PolygonArea {
       final LatLng currentPoint = polygonPoints[i];
       final LatLng nextPoint = polygonPoints[(i + 1) % polygonPoints.length];
 
-      area += (currentPoint.latitude + nextPoint.latitude) *
-          (currentPoint.longitude - nextPoint.longitude);
+      area += (currentPoint.latitude * nextPoint.longitude -
+          nextPoint.latitude * currentPoint.longitude);
     }
 
     area = area.abs() / 2.0;

lib/src/util/unit_conversion.dart

@@ -0,0 +1,123 @@
+/// Unit Distance Conversion
+extension UnitConversions on num {
+  /// Metric Units
+  double get millimetersToMeters => this / 1000.0;
+
+  /// Meter To Millimeters
+  double get metersToMillimeters => this * 1000.0;
+
+  /// Centimeter to Meters
+  double get centimetersToMeters => this / 100.0;
+
+  /// Metres to Centimeters
+  double get metersToCentimeters => this * 100.0;
+
+  /// Decimeters to Meters
+  double get decimetersToMeters => this / 10.0;
+
+  /// Meters to Decimeters
+  double get metersToDecimeters => this * 10.0;
+
+  /// Kilometers to Meters
+  double get kilometersToMeters => this * 1000.0;
+
+  /// Meters to Kilometers
+  double get metersToKilometers => this / 1000.0;
+
+  /// Imperial Units
+
+  /// Inches to Centimeters
+  double get inchesToCentimeters => this * 2.54;
+
+  /// Centimeters to Inches
+  double get centimetersToInches => this / 2.54;
+
+  /// Feet to Meters
+  double get feetToMeters => this * 0.3048;
+
+  /// Meters to Feet
+  double get metersToFeet => this / 0.3048;
+
+  /// Yards to Meters
+  double get yardsToMeters => this * 0.9144;
+
+  /// Meters to Yards
+  double get metersToYards => this / 0.9144;
+
+  /// Miles to KiloMeters
+  double get milesToKilometers => this * 1.60934;
+
+  /// KiloMeters to Miles
+  double get kilometersToMiles => this / 1.60934;
+
+  /// Nautical Units
+
+  /// Nautical Miles to Kilometers
+  double get nauticalMilesToKilometers => this * 1.852;
+
+  /// Kilometers to Nautical Miles
+  double get kilometersToNauticalMiles => this / 1.852;
+
+  /// Astronomical Units
+
+  /// Astronomical to Meters
+  double get astronomicalUnitsToMeters => this * 149597870700.0;
+
+  /// Meters to Astronomical
+  double get metersToAstronomicalUnits => this / 149597870700.0;
+
+  /// Light Years
+
+  /// Light Years to Meters
+  double get lightYearsToMeters => this * 9.461e15;
+
+  /// Meters to Light Years
+  double get metersToLightYears => this / 9.461e15;
+
+  /// Parsecs
+
+  /// Parsecs To Meters
+  double get parsecsToMeters => this * 3.086e16;
+
+  /// Meters to Parsecs
+  double get metersToParsecs => this / 3.086e16;
+
+  /// Micrometers To Meters
+  double get micrometersToMeters => this / 1e6;
+
+  /// Meters To Micrometers
+  double get metersToMicrometers => this * 1e6;
+
+  /// NanoMeters To Meters
+  double get nanometersToMeters => this / 1e9;
+
+  /// Meters To Nanometers
+  double get metersToNanometers => this * 1e9;
+
+  /// Picometers To Meters
+  double get picometersToMeters => this / 1e12;
+
+  ///Meters to PicoMeters
+  double get metersToPicometers => this * 1e12;
+
+  /// Femtometers To Meters
+  double get femtometersToMeters => this / 1e15;
+
+  /// Meters To FemtoMeters
+  double get metersToFemtometers => this * 1e15;
+
+  /// Attometers To Meters
+  double get attometersToMeters => this / 1e18;
+
+  /// Meters To Attometers
+  double get metersToAttometers => this * 1e18;
+
+  /// Square Meters to Square Kilometers
+  double get squareMetersToSquareKilometers => this / 1e6;
+
+  /// Square KiloMeters to Square Meters
+  double get squareKilometersToSquareMeters => this * 1e6;
+
+  /// Meters To Square Kilometers
+  double get metersToSquareKilometers => this * this / 1e6;
+}

pubspec.yaml

@@ -1,6 +1,6 @@
 name: geodesy
 description: A Dart library for geodesic and trigonometric calculations working with points and paths
-version: 0.10.1
+version: 0.10.2
 homepage: https://github.com/wingkwong/geodesy
 
 environment:
@@ -10,5 +10,5 @@ dependencies:
   latlong2: ^0.9.0
 
 dev_dependencies:
-  lints: ^2.1.1
+  lints: ^3.0.0
   test: ^1.16.8