To mercator and to wgs84 function #230
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- Update documentation to use proper Dart doc syntax with types in [] - Convert var to final where appropriate - Maintain consistent documentation style across the codebase - Improve readability of function parameter documentation
- Removed lib/src/point_on_feature.dart - Removed lib/point_on_feature.dart - Removed benchmark/point_on_feature_benchmark.dart - Removed test/components/point_on_feature_test.dart These files are now part of the point_on_feature_final branch and pull request
- Updated convertCoordinates, toMercator, and toWGS84 functions to use Position type instead of List - Added proper altitude preservation during coordinate conversions - Improved error handling with ArgumentError and descriptive messages - Added tests to verify conversions and altitude preservation - Updated Progress.md to mark functions as implemented
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Created Two Main Functions:
Based this branch off original omercator and oWsg co-ordinate function
geoToMercator(): Transforms WGS84 coordinates to Web Mercator projection
geoToWgs84(): Converts Web Mercator coordinates back to WGS84
Implemented in Clean, Distinct Files:
lib/src/to_mercator.dart: Contains WGS84→Mercator transformation logic
lib/src/to_wgs84.dart: Contains Mercator→WGS84 transformation logic
Updated lib/transform.dart to export both functions
Full GeoJSON Support:
Both functions handle all standard GeoJSON types
Support for Position, Point, LineString, Polygon, MultiPoint, MultiLineString, MultiPolygon
Complete handling of Feature and FeatureCollection objects
Preservation of properties and metadata
Key Features:
Accurate mathematical transformations based on spherical Mercator formulas
Altitude preservation throughout transformations
mutate parameter for performance optimization
Comprehensive error handling and input validation
Robust type safety with appropriate casting
Testing:
Created dedicated test files for each transformation direction
Tests cover all supported GeoJSON object types
Verified round-trip accuracy
All tests passing successfully
Usage Examples:
Created example files demonstrating real-world usage
Included examples for different GeoJSON types
Demonstrated round-trip conversion accuracy