Add SMO-WGS84-TO-BNG Ruby gem

[Sebasmadridmx]

Summary

• Adds smo_wgs84_to_bng (v0.1.1) to the Ruby Exchange Gems catalog
• Pure Ruby gem for converting between WGS84 (GPS lat/lon) and OSGB36 British National Grid (easting/northing) using a 7-parameter Helmert transformation
• ~3–5 m accuracy across Great Britain, batch conversion support, forward and reverse transforms

Gem details

• RubyGems: https://rubygems.org/gems/smo_wgs84_to_bng
• Source: https://github.com/Sebasmadridmx/SMO-WGS84-TO-BNG
• License: MIT
• Dependencies: Zero runtime dependencies (pure Ruby stdlib)
• Tests: Minitest suite included
• Security: No eval, no shell execution, no deserialization, no file/network I/O in core logic

Test plan

• rake test passes locally
• Gem published and installable from RubyGems
• Round-trip conversion (WGS84 → BNG → WGS84) verified
• Input validation and error handling tested

🤖 Generated with Claude Code

[sonarqubecloud]

Quality Gate failed

Failed conditions
C Security Rating on New Code (required ≥ A)

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