Web services like MapQuest and Google Maps have transformed the way we think about and use online maps. These services do more than just offer driving directions—they provide APIs that web developers can use to build customized map applications. In Map Scripting 101, author Adam DuVander takes a project-based approach to teaching beginning map scripters how to create useful and fun online map mashups like weather maps and local concert trackers. In addition to covering the basic principles of map scripting, DuVander shows you how to use Mapstraction, an open source JavaScript library that you can use to script any of the mapping services. You'll learn how to create and manipulate basic maps by setting zoom levels; show and hide markers; geocode addresses; customize maps for visitors based on their locales; and more. You'll also learn to work with complex GIS (geographic information system) data; formats like Google Earth's KML (keyhole markup language) and GeoRSS (a standard for enconding location as part of a webfeed); and to create graphical overlays on maps to better analyze data and trends. This is a perfect book for any web developer beginning with map scripting, whether their goal is to build a map to track earthquakes around the world, or to mark the best coffee shops in town.