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GeoServer Beginner's Guide

GeoServer Beginner's Guide

By : Iacovella
3 (2)
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GeoServer Beginner's Guide

GeoServer Beginner's Guide

3 (2)
By: 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 (13 chapters)
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Working with tiles


In the previous section, you used an OpenLayers map of width 600 and height 400. The server sent you a single image of that size when you used the Single tile option. Switching to the tiled mode, OpenLayers split the map in tiles of 256x256 pixels. So, it sends 9 GetMap requests to GeoServer. In the following image, you can see the blue rectangle covering the 600x400 area of the map, while the 9 256x256 squares are the tiles:

Each request to the server is the same for any single tile, except the bbox parameter specifying the area.

Note

The bounding box parameter is called bbox. The value for bbox is the latitude and longitude of the area you're calling from GeoServer. The format for this parameter is bbox=minx,miny,maxx,maxy.

If your map's height and width are fairly small, using a single tile will likely take less time to render. This depends on your data filter and number of features too, but it is a good rule of thumb. Using a single tile will also be useful if you need...

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