OS MASTERMAP KEY EXPLAINED - COLOUR CODES AND SYMBOLS

MasterMap Colour Key

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The following table shows the RGB values for the area fills on an OS MasterMap map.

COLOUR HEADING TYPE R G B
undefined   Area Fills   Building 255 220 175
Screenshot 2021-07-08 at 17.18.20.png   Area Fills   Structure 255 215 195
Screenshot 2021-07-08 at 17.18.29.png   Area Fills   Glasshouse 255 204 153
Screenshot 2021-07-08 at 17.17.45.png   Area Fills   Heritage 255 220 175
Screenshot 2021-07-08 at 17.19.49.png   Area Fills   Manmade Surface 210 210 170
Screenshot 2021-07-08 at 17.20.34.png   Area Fills   Multiple Surface (e.g., paved and natural environment) 255 255 204
Screenshot 2021-07-08 at 17.20.41.png   Area Fills   Natural Environment 220 255 190
Screenshot 2021-07-08 at 17.20.44.png   Area Fills   Natural Environment 204 255 204
Screenshot 2021-07-08 at 17.20.49.png   Area Fills   Path 204 204 204
Screenshot 2021-07-08 at 17.22.18.png   Area Fills   Step 210 210 170
Screenshot 2021-07-08 at 17.22.23.png   Area Fills   Road 215 215 215
Screenshot 2021-07-08 at 17.22.27.png   Area Fills   Rail 204 204 204
Screenshot 2021-07-08 at 17.22.32.png   Area Fills   Water - Inland Water 190 255 255
Screenshot 2021-07-08 at 17.22.37.png   Area Fills   Water - Foreshore 204 255 255
Screenshot 2021-07-08 at 17.24.04.png   Area Fills   Water - Tidal 190 255 255
Screenshot 2021-07-08 at 17.24.07.png   Area Fills   Unknown Fill (Traffic Islands, etc.) 210 210 170
Screenshot 2021-07-08 at 17.24.12.png   Area Fills   Unclassified Fill (e.g. under development at the time of capture) 255 255 255
Screenshot 2021-07-08 at 17.24.17.png   Area Fills   Agricultural Land 186 212 167
Screenshot 2021-07-08 at 17.24.21.png   Area Fills   Constructed Water 152 204 217
Screenshot 2021-07-08 at 17.24.25.png   Area Fills   Sloping Masonry 183 184 138
Screenshot 2021-07-08 at 17.24.29.png   Area Fills   Mud 245 240 225

Symbols Key

Shared symbol geometry of Mastermap.

Screenshot 2021-07-08 at 17.36.25.png   Boulder Screenshot 2021-07-08 at 17.37.40.png Culvert Screenshot 2021-07-08 at 17.39.02.png Marsh
Screenshot 2021-07-08 at 17.36.19.png   Non-Coniferous  Tree Screenshot 2021-07-08 at 17.38.53.png Manmade Landform Screenshot 2021-07-08 at 17.39.43.png Scree
Screenshot 2021-07-08 at 17.36.41.png   Circle Screenshot 2021-07-08 at 17.38.45.png Heath undefined Rough Grass
Screenshot 2021-07-08 at 17.36.47.png   Circle Fill Screenshot 2021-07-08 at 17.38.38.png Coppice Screenshot 2021-07-08 at 17.39.29.png Rock Fill
Screenshot 2021-07-08 at 17.36.54.png   Coniferous Tree Screenshot 2021-07-08 at 17.37.50.png Heritage Site Screenshot 2021-07-08 at 17.39.22.png Orchard
Screenshot 2021-07-08 at 17.37.10.png   Bench Mark Screenshot 2021-07-08 at 17.38.23.png Water Point Screenshot 2021-07-08 at 17.39.15.png Natural Landform
Screenshot 2021-07-08 at 17.37.17.png Air Height Screenshot 2021-07-08 at 17.38.17.png Triangulation Station undefined Multi Vegetation
Screenshot 2021-07-08 at 17.37.23.png Boundary Mereing Screenshot 2021-07-08 at 17.38.08.png Spot Height undefined Point
Screenshot 2021-07-08 at 17.37.29.png Boundary Post Screenshot 2021-07-08 at 17.38.31.png Bush undefined Cross
Screenshot 2021-07-08 at 17.37.35.png Flow Arrow Screenshot 2021-07-08 at 17.38.01.png Road Flow undefined Landform Disused

Line styles

STYLE TYPE
Screenshot 2021-07-08 at 19.43.21.png   Default
Screenshot 2021-07-09 at 10.40.37.png   Default Dashed
Screenshot 2021-07-08 at 19.43.36.png   Building
Screenshot 2021-07-09 at 10.40.30.png   Building Overhead
Screenshot 2021-07-08 at 19.43.51.png   Water Bold
Screenshot 2021-07-08 at 19.44.02.png   Water Dashed
Screenshot 2021-07-09 at 10.40.23.png   Water
Screenshot 2021-07-08 at 19.44.19.png   Underground
Screenshot 2021-07-08 at 19.44.25.png   Structure Overhead
Screenshot 2021-07-08 at 19.57.58.png   Landform
Screenshot 2021-07-08 at 19.58.27.png   Standard-gauge rail
undefined   Parish
Screenshot 2021-07-08 at 19.58.37.png   Electoral
Screenshot 2021-07-08 at 19.58.45.png   County
Screenshot 2021-07-08 at 19.58.50.png   Parliamentary
Screenshot 2021-07-08 at 19.58.56.png   District
Screenshot 2021-07-08 at 19.59.05.png   Closing
Screenshot 2021-07-09 at 10.39.58.png   Motorway
Screenshot 2021-07-09 at 10.39.53.png   Primary Route
Screenshot 2021-07-09 at 10.39.43.png   A Road
Screenshot 2021-07-08 at 22.58.48.png   B Road
Screenshot 2021-07-08 at 22.59.03.png   Minor Road
Screenshot 2021-07-08 at 22.59.21.png   Local Street
Screenshot 2021-07-08 at 22.59.39.png   Private Road Public Access
undefined   Private Road Restricted Access
Screenshot 2021-07-09 at 10.39.15.png   Pedestrianised Street
Screenshot 2021-07-08 at 23.00.09.png   Alley
Screenshot 2021-07-08 at 23.00.19.png   Ferry
Screenshot 2021-07-08 at 23.00.41.png   Carriageway

This blog post describes the default data display styles in OS MasterMap. It defines the colours, fonts, symbols, and line styles that are used in the visual presentation and printing of OS MasterMap provided by MapServe as an official partner of the Ordnance Survey. The Ordnance Survey has selected colours that are consistent throughout the Internet. In the colour palette, the specific colours used are described by both their RGB and decimal values.

Symbols are used in two ways:

  1. Point symbols are used to indicate the location of certain features inside data, such as a phone call box or bollard. The symbol reflects the feature's location and kind. They are applied to the visual representation by translating them to the position of the feature they represent and rotating them by a specified amount if the orientation attribute is provided.
  2. Fill symbols are used to indicate some aspect of a polygon feature and are dispersed as a pattern fill throughout the polygon. For example, the symbol might reflect topographic surface information such as plant kind. Because of the overheads associated with using pattern fills in many modern software systems, it is observed that pattern fills are not widely used. They are optional depending on the user's needs and system capabilities.

Line styles are used to help users differentiate between different sorts of linear features. For example, some variations can be created to highlight:

  • Obstructing detail.
  • Non-obstructing detail.
  • Underground detail.
  • Overhead detail.
  • Building outlines.
  • Water limits and linear features.
  • Landform detail.
  • Narrow-gauge railways.
  • Statutory boundaries.
  • Polygon-closing features.

The Font used is : Arial®

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For more information about OS MasterMap visit our blog post

All information above is provided and it is a copyright of the ©Ordnance Survey.