Levantamiento fotogramétrico de las atalayas medievales del Altiplano más septentrional de Granada

[EN] The district of Baza took up more than a fourth of the Nasrid kingdom of Granada, the last Islamic region in the Iberian Peninsula (thirteenth to fifteenth centuries). This area encompassed the northern highlands of this region, the Almanzora river valley and other areas that would later be incorporated into the province of Almeria. The province of Granada came to include the municipalities that nowadays constitute the Baza and Huéscar highlands. There are more than thirty preserved watchtowers in these areas. They are in strategic points with wide visibility, enabling communication through smoke signals during daylight or beacons at night. In the Nasrid period this system was reinforced, and new towers were built in locations of special relevance. They are usually made in masonry with gravel filling, with circular base and cylindrical or tapered shape, with the solid base and a single chamber with elevated access for the tower watch, from which the plume of smoke could rise through a hole in the terrace. The upper part was intended for the canopy and, if necessary, to make a beacon. This network not only allowed the information about what was happening in the district to reach the main fortresses, and ultimately, to arrive to the Alhambra citadel, the seat of the Nasrid dynasty. This paper is focused in the digital survey that has been carried out on the towers preserved in these areas, in the northern border of the Nasrid kingdom of Granada, allowing a scientific and comparative analysis of this group of defensive elements from a morphological, architectural and constructive point of view.