El paisaje se define como un espacio geográfico con características morfológicas y funcionales similares en función de una escala "Escala (cartografía)") y una localización. Paisaje es todo lo que alcanza la visión, lo que llega a los sentidos. Está formado por volúmenes, colores, olores, movimientos, sonidos, etc. Diferentes personas presentan diferentes percepciones de un mismo paisaje.[4] La escala vendría definida por el tamaño del paisaje o, lo que es lo mismo, el tamaño de la "visión" del observador. Por ejemplo, un paisaje regional") como un gran desierto puede esconder paisajes diferenciales a escala local.
La localización es la posición del volumen del paisaje respecto a un sistema de referencia, modelizado por la cartografía.
En la tradición de ciencias del paisaje se han establecido tres elementos o subsistemas principales que componen los paisajes: abióticos (elementos no vivos), bióticos (resultado de la actividad de los seres vivos) y antrópicos (resultado de la actividad humana). Determinar estos elementos es lo que constituye el primer nivel del análisis geográfico. Las posibilidades combinatorias, prácticamente infinitas, que se pueden dar entre ellas determina las características de un paisaje en particular.[5].
The landscape in physical geography
The landscape arises from the interaction of the various geographical agents"). These agents are material and energetic from which forms and processes derive. They are classified as Lithosphere, Atmosphere, Hydrosphere and Biosphere. The latter differentiates the Anthroposphere (Technosphere"), a novel ecosystem")[6] formed by human populations and which plays a differentiated role as an agent of the landscape, even generating a new era in the history of the Earth (the Anthropocene).
The interaction of these agents forms the wide spectrum of landscapes defined by their geographical characteristics. The relationship that exists between all its constituent elements is multicausal and dynamic. Changes are both a product and a condition of the dynamics of landscapes, in which humans play a specific role.
The biosphere sits on the surface, which is the contact zone between the different spheres, and especially in the hydrosphere. The biosphere transforms the surface landscape but is then limited according to its functional characteristics to lithological reliefs, atmospheric characteristics (climates) and water availability.
In a special way, the anthroposphere formed by human beings in their social organization and in their settlement and use of the territory stands out in the biosphere. Since its influence covers almost every corner of the planet, the landscape is no longer defined by its natural agents, natural landscapes are only marginal and residual spaces.
In the definition of landscape given to us by the Spanish physical geographer María de Bolós, another theory of the landscape of a geophysical nature is evident, in which the existence of three fundamental elements is appreciated: the characteristics of the geosystem that defines them, the size referred to a spatial scale (epigeosphere, that is, a system open from the cosmos as well as towards the interior of the earth) and the period of time considered in the temporal scale (dating methods - absolute and relative - and time scales). chronological – megascale, macroscale, mesoscale and microscale).[7].
The age of a landscape is measured according to the author, as soon as it begins to function as a system, like the current geosystem that it is. Ancient landscapes are those in whose formation all the elements appear at the same time in a dynamic form that has long been similar to the current dynamics they present. New landscapes are not born out of nothing, but rather they are mostly radical or extensive anthropizations of the old ones, these can appear due to: "anthropogenic causes, climate changes, recent tectonic movements, modifications in the coastline, land emergence or formation of new islands" [among the main ones].[8].