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Defence Estate Quality Management System (DEQMS) Davis Langdon Certification Services

Objective Compliance Element Spatial Data Management Plan (SDMP)

Implementation & Operation

The SDMP shall be used by spatial data users both within Defence and Defence Contractors, and data managers within E&IG. It is the responsibility of data users to implement the SDMP Specifications and produce data in accordance with the specifications.

The SDMP is made up of three main Sections:

  • Section 1 provides an introduction to the SDMP, the scope of implementation and other background information to the document.
  • Section 2 contains the General Data Specification that describes data formats, file naming conventions, metadata requirements, the approved datum and coordinate systems, measurement units, accuracy and other E&IG data standards.
  • Sections 3 onwards contain a set of specific data type specifications that shall be implemented by all spatial data users. The data specifications cover the key E&IG data types, the Master Site Plan and the Spaces (Floor) Plans, in addition to specifications for engineering detail survey, aerial photography, master planning, environmental data and other data types.

Data Users shall implement all requirements defined in Section 2, and the specific data requirements in Sections 3 onwards as determined by the type of data to be created or updated.

Appendices support the SDMP, providing detail of the E&IG Spatial Data Management Specification, the full Metadata Specification and additional appendices to support the core data specification and data type specifications.

A set of Template Datasets are provided as part of the SDMP to assist in the implementation of the SDMP specification. The templates include example data that has been collected in accordance with the SDMP specifications.

SDMP Specification Process

SDMP Specification Process


A Spatial Data Overlay Management Plan (SDOMP) can be developed to guide business areas in defining their spatial operational data layers. For a particular spatial dataset the SDOMP outlines:

  • Roles and responsibilities
  • Background & business requirements
    • Dataset description
    • Purpose
    • Audience
    • Legislative requirements
    • Metadata
  • Data collection
    • Current process / methodology
    • Sources of data
    • Spatial data type
    • Aspatial data requirements
    • Standards
  • Data access
    • Limitations
    • Recommended use
  • Data storage

Technical Authorities may develop these plans and increase detail over time but the objective of the template is to ensure the ideal data is captured and stored in NSIMS (GEMS) for planning and reporting purposes.

For more information on developing your SDOMP please contact the spatial team at Estate Geospatial