Portal de Periódicos da CAPES

Keyhole Markup Language

2013; Springer International Publishing; Linguagem: Inglês

10.1007/978-1-4614-7900-0_17

2197-5744

Deborah Nolan, Duncan Temple Lang,

Data Analysis with R

In this chapter, we explore two innovative tools for interactive visualization: Google Earth and Google Maps. Google Earth renders Keyhole Markup Language (KML) documents for viewing on a virtual earth browser, and similarly, Google Maps displays KML-formatted data on two-dimensional maps in a Web browser. KML is a grammar of XML for marking up spatial data. With it we can place plotting symbols on a map, augment these points with additional information, overlay R plots on the earth, animate points that have times associated with them, and draw arbitrary objects on the earth. We describe plotting functions in R that we have developed for creating KML displays with these features. We also discuss how to embed Google Earth in a Web page to create interactive mash-ups using KML, SVG, HTML, JavaScript, and R.