This isn't a comprehensive guide to Gnuplot just my own notes on generating image layers for use with OpenLayers. There's a comprehensive collection of gnuplot demo scripts, and gallery of the plots, here http://gnuplot.sourceforge.net/demo_4.2/ From these I was able to see that gnuplot would be able to create the type of images I needed for my application. Default OpenLayers projection is EPSG:4326 - but check map.getProjectionObject() Use proj4 to reproject. The config file /usr/share/proj/epsg has a configfile for epsg:4326 It's simply +proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs ReferencesJavascript version of Proj4 here http://trac.osgeo.org/proj4js/ |