Vegetation maps show the boundaries of plant communities and land types. Vegetation is classified on the basis of differences in floristic composition.
If vegetation cover is less than 10%, the land is defined as sparsely vegetated or non-vegetated land and classified on the basis of land type (e.g., lava fields and hydrothermal clay).
Digital image maps (orthophoto maps) are used for fieldwork. Satellite remote sensing is also useful for classification of vegetation and land types, and infrared Spot-5 images have been used in recent years in addition to image maps.