# Land and Terrain Portfolio ## Land and terrain products This portfolio provides data describing the surface of the ground and details how the land is used. It allows you to classify surface characteristics, model elevation and slope, locate greenspace, and depict the extent and function of specific human activities and uses. The following downloadable products are available within the Land and Terrain Portfolio:

			Cover image
OS MasterMap Greenspace Layer	A detailed dataset of public and private greenspaces within urban areas for Great Britain.	N.B. This product will become End of Life on 31 March 2027* and will be withdrawn.*	MasterMap-Greenspace-5.png	os-mastermap-greenspace-layer
OS MasterMap Sites Layer	A dataset containing the detailed extents of important locations such as airports, schools, hospitals, utility and infrastructure sites, and more.		Sites_layer_Cover.png	os-mastermap-sites-layer
OS Open Greenspace	An open dataset depicting the location, access and extent of spaces, such as parks and sports facilities likely to be accessible to the public.		Open-Greenspace-5.png	os-open-greenspace
OS Open Linked Identifiers	An open dataset of cross-referenced identifiers detailing relationships between Unique Property Reference Numbers (UPRNs), Unique Street Reference Numbers (USRNs) and Topographic Identifiers (TOIDs).		LinkedIDs_banner_small.png	os-open-linked-identifiers
OS Open TOID	An open dataset of unique identifiers for landscape and built environment features with a generalised location extracted from OS MasterMap products.		open-toid-data.xdc094ecd (1).webp	os-open-toid
OS Terrain 5	Provides a highly detailed digital terrain model (DTM) of Great Britain as a grid of heighted points or contours at 5metre intervals.		Terrain-5-5.png	os-terrain-5
OS Terrain 50	An open height dataset of contours with spot heights, breaklines, coastline, lakes, ridges and formlines for Great Britain provided at 10metre intervals.		Terrain-50-1.png	os-terrain-50

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OS MasterMap Greenspace Layer

OS MasterMap Sites Layer

OS Open Greenspace

OS Open Linked Identifiers

OS Open TOID

OS Terrain 5

OS Terrain 50