User Guide - Digimap

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1:50 000 Scale Colour Raster and Gazetteer<strong>User</strong> guideContentsSectionPage noPreface ..................................................................................................................................................3Chapter 1 Introduction .............................................................................................................................51:50 000 Scale Colour Raster...................................................................................................51:50 000 Scale Gazetteer .........................................................................................................5Chapter 2 Content.....................................................................................................................................71:50 000 Scale Colour Raster...................................................................................................71:50 000 Scale Gazetteer .........................................................................................................7Chapter 3 Scale.........................................................................................................................................9Coordinates...............................................................................................................................9Coverage...................................................................................................................................9Chapter 4 Formats..................................................................................................................................10TIFF.........................................................................................................................................10TIFF compressions explained............................................................................................10BMP ........................................................................................................................................10BMP structure .........................................................................................................................10PCX.........................................................................................................................................10PCX structure..........................................................................................................................10Chapter 5 Data compression.................................................................................................................11Image compression.................................................................................................................11Lossless compression .......................................................................................................11Lossy compression ............................................................................................................11TIFF.........................................................................................................................................11Chapter 6 Georeferencing .....................................................................................................................12Chapter 7 Revision .................................................................................................................................13Annexe A Product and service performance report form ..................................................................14v2.0.1 – 01/2008D05300_191:50 000 Scale Colour Raster and Gazetteer user guide contents v2.0.1 – 01/2008 © Crown copyright Page 2 of 33
PrefaceThis user guide (hereafter referred to as the guide) is designed to provide an overview of1:50 000 Scale Colour Raster and 1:50 000 Scale Gazetteer (hereafter referred to as the product) and itgives guidelines and advice on how a customer might derive the maximum benefit from the product. Itassumes a general knowledge of geographic information. If you find an error or omission in this guide, orotherwise wish to make a comment or suggestion as to how we can improve the guide, please contact us atthe address shown below under contact details or complete the product and service performance report format annexe A and return it to us.Contact detailsOur Customer Service Centre will be pleased to deal with your enquiries:Customer Service CentreOrdnance SurveyRomsey RoadSOUTHAMPTONSO16 4GUGeneral enquiries (calls charged at local rate): 08456 05 05 05Dedicated Welsh Language HelpLine: 08456 05 05 04Textphone (deaf and hard of hearing users only please): +44 (0)23 8079 2906Email: customerservices@ordnancesurvey.co.ukor visit the Ordnance Survey website at: www.ordnancesurvey.co.ukUse of the productThe terms and conditions upon which the product, including this guide, is made available to you and yourorganisation are contained in the customer contract made between you and Ordnance Survey. If there is aninconsistency between the terms of your customer contract and this guide, then the terms of your customercontract prevail. If you or your organisation has not signed a valid current customer contract then you are notentitled to use the product.Purpose and disclaimerThis guide is provided for guidance only and does not constitute any warranty, representation, undertaking,commitment or obligation (express or implied) about the product or its suitability for any particular or intendedpurpose. Any warranties, representations, undertakings, commitments and obligations given byOrdnance Survey about the product and/or its suitability for any particular or intended purpose are set out inyour customer contract. It is your responsibility to ensure that this product is suitable for your intendedpurpose.Ordnance Survey does not accept any liability (whether for breach of contract, negligence or otherwise) forany loss or liability you or any third party may suffer in relying on this guide and any guidance, suggestion,advice or explanation provided in it. Any liability that Ordnance Survey has to you in relation to the product,its supply, use, accuracy, data supplied, functionality or any other liability arising out of or in connection withthe product is limited as set out in your customer contract.We may change the information in this guide at any time without notice.We do not accept responsibility for the content of any third party websites referenced or accessed in orthrough this guide, any contractual documentation, and/or the Ordnance Survey website.Copyright in this guideThis guide (including for the avoidance of doubt any mapping images reproduced herein) is© Crown copyright 2008. All rights reserved.Any part of this guide may be copied for use internally in your organisation or business so that you can usethe product for the purpose for which it is licensed to your organisation or business (but not otherwise).1:50 000 Scale Colour Raster and Gazetteer user guide preface v2.0.1 – 01/2008 © Crown copyright Page 3 of 33
Page 4 and 5: No part of this guide may be reprod
Page 6 and 7: 1:50 000 Scale Gazetteer has the fo
Page 8 and 9: Each record contains the informatio
Page 10 and 11: Chapter 4Formats1:50 000 Scale Colo
Page 12 and 13: Chapter 6GeoreferencingTo be able t
Page 14 and 15: Annexe AProduct and service perform
Page 16 and 17: IntroductionPurpose of this specifi
Page 18 and 19: Chapter 2Legend1:50 000 Scale Colou
Page 20 and 21: 1:50 000 Scale Colour Raster and Ga
Page 22 and 23: Chapter 3GeoreferencingA definition
Page 24 and 25: TIFFColour image directory (TIFF)Ta
Page 26 and 27: data structureThe defined logical a
Page 28 and 29: eal-world objectThe real-world feat
Page 30 and 31: CO_CODE COUNTY FULL_COUNTYDZ Dudley
Page 32 and 33: CO_CODE COUNTY FULL_COUNTYSH Shrops

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