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GeoServer Beginner's Guide

You're reading from   GeoServer Beginner's Guide Share and edit geospatial data with this open source software server

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Product type Paperback
Published in Feb 2013
Publisher Packt
ISBN-13 9781849516686
Length 350 pages
Edition 1st Edition
Languages
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Toc

Table of Contents (20) Chapters Close

GeoServer Beginner's Guide
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
1. GIS Fundamentals FREE CHAPTER 2. Getting Started with GeoServer 3. Exploring the Administrative Interface 4. Accessing Layers 5. Adding Your Data 6. Styling Your Layers 7. Creating Simple Maps 8. Performance and Caching 9. Automating Tasks: GeoServer REST Interface 10. Securing GeoServer Before Production 11. Tuning GeoServer in a Production Environment 12. Going Further: Getting Help and Troubleshooting Pop Quiz Answers Index

Understanding Styled Layer Descriptor


A map is generally composed of a set of layers. Each layer contains features of a determined type. When you ask GeoServer for a map, it has to extract features from the repository (for example, from a shapefile) and draw them according to some rules. Of course, it needs a repository for storing those rules and hence GeoServer developers need to decide a format for the storage medium containing rules.

Map rendering is not just a GeoServer problem; not surprisingly, it is common to all software-producing maps. Hence, it is not surprising that someone has defined a standard approach to styling layers. Indeed, GeoServer doesn't use a custom format for styles; instead it leverages on an OGC standard.

The standard describes the structure of the documents and which rules can be used. A document containing symbols' definitions and drawing rules is called a Styled Layer Descriptor (SLD) style and it is a text/XML file (its extension in GeoServer is .sld). SLD is...

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