Maximum map extent

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Author	Jian Huang
File Name	maxextent.zip
Language	JavaScript
Last Modified	Aug 8 2010
Status of work	ESRI Attribution and Licensing Agreement
Software	ArcGIS Server (10.0 and prior)
File Size	2 bytes
Downloads	728
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Summary
Often times, a web map is composed of a base map layer and a operational map layer. The operational layer focuses on a specific area most likely. However, the base map could cover the whole world. It leads to a question how to limit the map to a specific extent. Another frequently asked question is how to stop the map being panned outside the world boundary. Currently JavaScript API doesn’t support wrapping world map, so if it pans outside the world boundary, strange white space will show up on the map. In order to resolve those questions, the solution can be broken into two steps: 1. Setting the scale levels to limit the visible scales. It can be achieved by following the online sample “set visible scales”. But it doesn’t prevent users from panning the map outside the focused area. 2. Defining the extent boundary that map cannot move outside, which is illustrated in this sample.

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