The KML download gives you an option to download a high or low resolution KML. The high resolution KML is of high quality and hence, larger in size as compared to a low resolution KML. To view downloaded KML(s), use Google Earth or ArcGIS Explorer Desktop.
This page offers spatial data sets in a number of different formats hosted by the Virtual Kenya WorldMap database. The supported download formats include: Shapefiles, GML, CSV, Excel, GeoJSN, JPEG, PDF, and PNG, as well as WorldMap's own low-resolution KML.