Euroscope Coordinates Reducer

An optimization tool for TopSky and GroundRadar map files. This tool applies the Ramer-Douglas-Peucker (RDP) algorithm to significantly reduce coordinate density in large map sectors while maintaining logical integrity and visual precision.

Key Features

• Safety Guards:
  • Chain Detection: Detects connected lines and only simplifies them if they form a significant chain (>3 segments).
  • Infrastructure Protection: Isolated segments (like runway lines) and small polygons (<5 points) are preserved exactly as they appear in the source.
• Redundant Data Cleaning: Automatically removes zero-length segments and duplicate points that often bloat exported SCT data.

Performance Benchmark

File Type	Original Size	Optimized Size	Reduction
SKBO TMA	6.6 KB	3.2 KB	~50.8%
SKRG	547.0 KB	123.3 KB	~77.5%

Usage

1. Place your source files in the Input folder.
2. Run the optimization script:

   python CoordinateReducer.py

   To use a custom simplification threshold (epsilon):

   python CoordinateReducer.py --epsilon 0.00005

3. Find your optimized, high-performance files in the Output folder.

Configuration

You can fine-tune the simplification threshold (epsilon) directly from the command line. The default is 0.00001 (approximately 1 meter). Higher values will simplify the paths more aggressively, while lower values will preserve more detail.

You can also specify custom input/output directories:

python CoordinateReducer.py --input MySourceDir --output MyResultDir

Technical Details

The tool uses a non-destructive parsing approach. Any lines that are NOT coordinates or lines (like COLOR:, FOLDER:, ZOOM:, or comments) are passed through exactly as they were. When a segment is small enough to not require simplification, the script reuses the original string from the file to ensure 100% precision and zero floating-point drift.