OS NGD Core Principles


The following Core Principle pages provide an overview of the OS National Geographic Database (NGD). They cover the core elements of its design, including the format of data you can access, the coordinate reference systems used, and how Change-Only Updates (COUs) will be provided, amongst other topics.

These pages should be used in conjunction with the more detailed pages within the Data Structure section which are specifically focussed on the different OS NGD themes, collections and feature types.

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