# OS 3D Mesh Overview OS 3D Mesh beta data is created from aerial imagery originally captured as part of our national imagery capture program on a three-year cycle across the whole of Great Britain. ## Product applications OS 3D Mesh can be used within a Geographic Information System (GIS) or 3D modelling software to provide a 3D view of the Earth and features present on the surface. The product has been developed to enable the visualisation of an area and for detailed analysis of complex scenes in disciplines such as: * Urban planning * Citizen engagement * Telecommunications planning (for example, line-of-sight modelling) * Security (for example, viewshed analysis for threat detection at international events) * Asset monitoring and planning (for example, wind farm and electricity pylon location planning) * Flood risk assessment ## Accuracy OS 3D Mesh beta data is derived from imagery captured to update the National Geographic Database. Source imagery is captured at a ground sample distance (pixel size on the ground) of 15cm x 15cm. ## INSPIRE compliance The European INSPIRE data specification includes elevation datasets such as gridded digital terrain models and Triangulated Irregular Networks (TINS) but does not include 3D meshes. The OS 3D Mesh can therefore not be provided as an INSPIRE compliant dataset, unless and until INSPIRE brings 3D meshes into its remit. ## Product supply details OS 3D Mesh is available as OGC 3D Tiles. This format (often referred to as Cesium 3D Tiles) is an international standard widely used in both the gaming and geospatial data industries. The product will be created to order and supplied as a download. For large areas, the product will be broken down into smaller units for ease of use. --- # 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/upcoming-products/beta-products-information/os-3d-mesh-beta-product/overview.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.