Neogeography is a diverse set of practices that operate outside, or alongside, or in the manner of, the practices of professional geographers. Rather than making claims on scientific standards, methodologies of neogeography tend towards the intuitive, expressive, personal, absurd, and or artistic, but may just be idiosyncratic applications of "real" geographic techniques. This is not to say that these practices are of no use to the cartographic/geographic sciences, but that they just usually don't conform to the protocols of professional practice.
Neogeography covers a broad field of activity, which includes urban exploration, site specific sculpture, land/earth art, geo-tagging, guided walks, ephemeral cities, imaginary urbanism, altered maps/radical cartography, travel writing, psychogeography, place based photo blogging, etc.