Book Image

GeoServer Beginner's Guide - Second Edition

By : Stefano Iacovella
Book Image

GeoServer Beginner's Guide - Second Edition

By: Stefano Iacovella

Overview of this book

GeoServer is an opensource server written in Java that allows users to share, process, and edit geospatial data. This book will guide you through the new features and improvements of GeoServer and will help you get started with it. GeoServer Beginner's Guide gives you the impetus to build custom maps using your data without the need for costly commercial software licenses and restrictions. Even if you do not have prior GIS knowledge, you will be able to make interactive maps after reading this book. You will install GeoServer, access your data from a database, and apply style points, lines, polygons, and labels to impress site visitors with real-time maps. Then you follow a step-by-step guide that installs GeoServer in minutes. You will explore the web-based administrative interface to connect to backend data stores such as PostGIS, and Oracle. Going ahead, you can display your data on web-based interactive maps, use style lines, points, polygons, and embed images to visualize this data for your web visitors. You will walk away from this book with a working application ready for production. After reading GeoServer Beginner's Guide, you will be able to build beautiful custom maps on your website using your geospatial data.
Table of Contents (20 chapters)
Title Page
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
Index

Seeding a layer


As of now, we have used the GeoWebCache to store tiles produced by user requests. Of course, the following requests with equal parameters will hit the cache and GeoServer will not render a new map for them.

However, you can also precalculate the tiles for a layer to avoid some users experiencing a delay when requesting zoom levels and areas not yet cached.

The process of precalculating tiles is called seeding. This section will guide you in understanding how it works:

  1. Go to the Tile Layers page and look for the Packt:ne_50m_rivers_lake_centerlines layer. Click on the Seed/Truncate link for it:
  1. A new page will open. The GeoWebCache seeding is not integrated in the GeoServer web interface. What you see is the GeoWebCache interface:

  1. Scroll to the Create a new task section. You have to set the parameters for the seeding. The first one is the number of parallel processes; that is, threads that will request maps to GeoServer. As we have a single GeoServer instance, there is no gain...