User Guide - Digimap

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Address Layers OS MasterMap Address Layers contain approximately 28 million geographic features in Great Britain (which is England, Scotland and Wales, but not the Isle of Man, the Channel Islands or Northern Island). Addresses are available in two sets. The first Address Layer contains postal addresses with a unique identifier, references to the underlying OS MasterMap Topography Layer feature, and information on how and when the address may have changed. In Address Layer 2 each feature is provided with a unique identifier, a series of cross-reference identifiers to relevant features in other datasets, one or more postal addresses, a coordinate position on the British National Grid, one or more classifications and information on how and when that feature has changed. Figure 5 shows the addresses symbolised as letters and displayed in geographic relationship to each other. Figure 5: OS MasterMap Address Layers OS MasterMap Topography Layer user guide chapter 1 v1.3 – 07/2007 © Crown copyright Page 12 of 140
Integrated Transport Network (ITN) Layer OS MasterMap includes an ITN Layer that currently contains the Roads Network and Road Routing Information (information that may affect a driver’s choice of route) for Great Britain. The road network is in geometric sympathy with the underlying topographic features and includes cross references between network components and the features in the Topography Layer that they intersect. The Road Routing Information is only useable in conjunction with the roads network data, so can only be ordered together with the Roads Network theme. The Roads Network theme can be ordered on its own. The ITN Layer contains approximately 13 million road features and 1.5 million items of Road Routing Information. Figure 6 shows a selection of the road network. Each colour represents a different classification of road. Figure 6: OS MasterMap ITN Layer OS MasterMap Topography Layer user guide chapter 1 v1.3 – 07/2007 © Crown copyright Page 13 of 140
Page 2 and 3: OS MasterMap Topography Layer User
Page 4 and 5: Preface This user guide (hereafter
Page 6 and 7: Chapter 1 Introduction to OS Master
Page 8 and 9: The vector and raster data models T
Page 10 and 11: Currently, national cover is availa
Page 14 and 15: Imagery Layer The Imagery Layer com
Page 16 and 17: Chapter 2 Introduction to OS Master
Page 18 and 19: It is important for many applicatio
Page 20 and 21: Chapter 3 Feature life cycles and t
Page 22 and 23: One of the key differences between
Page 24 and 25: Joining of polygon features When tw
Page 26 and 27: The other type is a polygon closing
Page 28 and 29: Chapter 4 OS MasterMap Topography L
Page 30 and 31: A textual description is used for c
Page 32 and 33: Rail These are defined as features
Page 34 and 35: There are two situations where cons
Page 36 and 37: Figure 17 shows a sample of real-wo
Page 38 and 39: Table 3 Value of descriptive group
Page 40 and 41: This chapter has discussed the them
Page 42 and 43: Table 4: Attribution by feature typ
Page 44 and 45: Physical level The physical level a
Page 46 and 47: Text string Cartographic text that
Page 48 and 49: The advantages of supplying COU rat
Page 50 and 51: Supply of OS MasterMap Topography L
Page 52 and 53: Departed features are supplied in C
Page 54 and 55: Chapter 7 Change management and dat
Page 56 and 57: This is a more efficient way of sto
Page 58 and 59: Figure 28: Styling options with OS
Page 60 and 61: Annexe A Administrative boundary al
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OS MasterMap Topography Layer Techn
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Symbols ...........................
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Chapter 1 Key concepts This section
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Chapter 3 Theme definitions This ch
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Chapter 4 Feature attribution In OS
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CartographicSymbol Attribute Occurr
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Simple attribute name Type Descript
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Simple attribute name Type Descript
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Chapter 6 Attribute values Attribut
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The following table clarifies the u
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Descriptive group Feature type Desc
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Make Descriptive group Feature type
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Chapter 7 Geometry and topology Int
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Example class model Rectangle A rec
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Polygon boundary duplication A brea
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Chapter 9 GML output format The OS
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For geographically chunked data, if
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For example: 12365.563,8975.676
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Schema descriptions The W3C-provide
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descriptiveGroup descriptiveTerm ma
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Property application logic This sec
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Chapter 11 Data supply service The
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Annexe A Glossary The purpose of th
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georectified imagery The georectifi
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orthorectified imagery The Imagery
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Annexe B GML examples 1 A typical T
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Annexe C Cartographic style definit
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Fonts The gml2svg.xsl declares the
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Geometry: boundaryMereingChangeSy
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triangulationStationSymbol Style: s
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multiVegetationFillSymbol Style: st
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screeFillSymbol Style: stroke:#6666
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smallNonconiferousTreeFillSymbol St
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Definitions Transformation 1 Symbol
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Name: roughGrassAndMarshFillSymbol
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Name: roughGrassScatteredRocksAndHe
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nonconiferousTreesAndScrubPattern r
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Water bold Name - waterBoldLine str
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Parliamentary Name - parliamentaryL
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Acute accent on the following (for
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User Guide - Digimap

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