Jean-Baptiste Demonte writes that the latest version of "GMap3 JQuery Plugin for Google Maps" has been released. This plugin makes it easier for JQuery developers to add the Google Maps JavaScript control to their web applications.

A simple example can be found on the home page of the project website (GMap3.Net). The site also includes a list of more sophisticated examples which will be of use to developers. Finally, the software is released under an open source license and can be downloaded at GitHub.

This article was previously published on GeoChalkboard, and has been reproduced here with permission. GeoChalkboard is published by Geospatial Training Services who provide a range of geospatial web courses.

In the first article in our series on the ArcGIS Server API for Flex we covered some basic concepts including how to create maps and add layers. We covered both tiled and dynamic map service layers. In this brief article you will learn how to apply a definition expression to your dynamic map service layer to restrict the features displayed from a layer. For instance, in the figure below we are plotting only those counties that suffered a population loss from 2000 to 2007.