# Maps and Imagery Products Technical Specification ## Index The following pages contain general information relating to Maps and Imagery products: * [Georeferencing information](/os-downloads/products/maps-and-imagery-portfolio/maps-and-imagery-fundamentals/maps-and-imagery-products-technical-specification/georeferencing.md) * [Image file directory entries](/os-downloads/products/maps-and-imagery-portfolio/maps-and-imagery-fundamentals/maps-and-imagery-products-technical-specification/image-file-directory-tiff.md) * [Abbreviations used on OS 1:25 000 and 1:50 000 scale mapping](/os-downloads/products/maps-and-imagery-portfolio/maps-and-imagery-fundamentals/maps-and-imagery-products-technical-specification/abbreviations-used-on-os-1-25-000-and-1-50-000-scale-mapping.md) * [Product glossary](/os-downloads/products/maps-and-imagery-portfolio/maps-and-imagery-fundamentals/maps-and-imagery-products-technical-specification/product-glossary.md) Detailed information relating to each individual product's specification 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) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.os.uk/os-downloads/products/maps-and-imagery-portfolio/maps-and-imagery-fundamentals/maps-and-imagery-products-technical-specification.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.