# Maps and Imagery Products Overview

## Index

The following pages contain general overview information relating to the Maps and Imagery products:

* [Metadata](/os-downloads/products/maps-and-imagery-portfolio/maps-and-imagery-fundamentals/maps-and-imagery-products-overview/metadata.md)
* [Data compression](/os-downloads/products/maps-and-imagery-portfolio/maps-and-imagery-fundamentals/maps-and-imagery-products-overview/data-compression.md)
* [Data measures](/os-downloads/products/maps-and-imagery-portfolio/maps-and-imagery-fundamentals/maps-and-imagery-products-overview/data-measures.md)

Detailed product information relating to each individual product in the portfolio can be found in the following pages:

* [1:25 000 Scale Colour Raster Technical Specification](/os-downloads/products/maps-and-imagery-portfolio/1-25-000-scale-colour-raster/1-25-000-scale-colour-raster-technical-specification.md)
* [1:50 000 Scale Colour Raster Technical Specification](/os-downloads/products/maps-and-imagery-portfolio/1-50-000-scale-colour-raster/1-50-000-scale-colour-raster-technical-specification.md)
* [1:250 000 Scale Colour Raster Technical Specification](/os-downloads/products/maps-and-imagery-portfolio/1-250-000-scale-colour-raster/1-250-000-scale-colour-raster-technical-specification.md)
* [GB Overview Maps Technical Specification](/os-downloads/products/maps-and-imagery-portfolio/gb-overview-maps/gb-overview-maps-technical-specification.md)
* [MiniScale Technical Specification](/os-downloads/products/maps-and-imagery-portfolio/miniscale/miniscale-technical-specification.md)
* [OS Open Zoomstack Technical Specification](/os-downloads/products/maps-and-imagery-portfolio/os-open-zoomstack/os-open-zoomstack-technical-specification.md)
* [OS OpenMap – Local Technical Specification](/os-downloads/products/maps-and-imagery-portfolio/os-openmap-local/os-openmap-local-technical-specification.md)
* [OS VectorMap District Technical Specification](/os-downloads/products/maps-and-imagery-portfolio/os-vectormap-district/os-vectormap-district-technical-specification.md)
* [OS VectorMap Local Technical Specification](/os-downloads/products/maps-and-imagery-portfolio/os-vectormap-local/os-vectormap-local-technical-specification.md)


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