Les plans directeurs de la Grande Guerre.

A century on from the First World War, many papers are published on the Great War. Approaches are mainly historic or social, but not geographic and spatial. Nevertheless, for archaeology of the Great War, genealogical researches, and duty of memory, lecturers consult battle maps or directing plans extracts. Then the objective of this article is double. Firstly, it puts directing plans in the context of the French cartography evolution. Indeed, the trench warfare, with an uninterrupted line of entrenched German and Anglo-French forces from Lorraine to Belgium's coast, imposed cartographic innovations. And secondly, keys of reading directing plans (coordinate and projection systems, scales, legend) are proposed. [ABSTRACT FROM AUTHOR]