Archaeological techniques - introduction

Archaeological techniques can be divided into intrusive and non-intrusive categories. Intrusive techniques, such as excavation, involve the destruction of the archaeological resource as part of the process of investigation and should only be used when necessary, as part of a clearly defined research strategy. Non-intrusive techniques include field walking, landscape survey, aerial photography and geophysical survey. Non intrusive techniques may be used to gather as much information about the archaeological implications of a development as possible, in the early stages of the planning process but they may also be used to develop a greater understanding of sites, monuments or landscapes alongside excavation or on their own.