UK Precision GridShift is a CLI-based Python tool for reprojecting RGB Orthomosaics, Multispectral Orthomosaics, DSMs, and LAS Point Clouds from WGS84 UTM Zone 30N to British National Grid/Ordnance Datum Newlyn using Ordnance Survey OSTN15 and OSGM15 transformation grids.

• Reprojects orthomosaics, DSMs, and LAS point clouds from WGS84 UTM Zone 30N to the British National Grid
• Applies OSTN15 horizontal and OSGM15 vertical transformations
• Supports RGB, multispectral, DSM, and LAS datasets
• CLI-based for reproducible batch processing
• Compatible with local Conda environments and Google Colab.

Standard mathematical transformations (Helmert) can be off by up to 5 metres in the UK. This tool uses the OSTN15/OSGM15 grid shifts to preserve centimetre-level accuracy, provided the input datasets are of survey-grade quality.

⚠️ Please note: This tool is designed specifically for England, Scotland, and Wales. It is not suitable for Northern Ireland, which uses a different datum and geoid model.