This article provides an approach to the geographic and quantitative interpretation of tourism intensification, drawing on the concepts of fractals, and fractal dimension (D). Exploring tourism intensification in Lisbon, we first present a geographic construct that represents the spatial layout of tourism based on crowd-contributed spatial signatures advocating a collective sense of the “tourist city.” Then, we assess the tourism-related intensification patterns, based on the estimation of D, for different years. Significant statistical associations can be found between D and tourism intensification across the urban space. Intensification on tourism cores is more homogeneously distributed, yet it evolves into a more compact form of spatial organization. On the other hand, there is a decline in the degree of homogeneity of tourism intensification from tourism cores to the periphery. This approach has also proved useful for exploring tourism intensification in destinations at different hierarchical levels, such as in Lisbon and Oporto metropolitan areas.

本文利用分形和分形维数（D）的概念，对旅游业集约化进行了地理和定量解释。在研究里斯本的旅游业集约化之后，我们首先提出一种地理构造，该构造物基于人群参与的空间特征来代表旅游业的空间布局，倡导一种“旅游城市”的集体意识。然后，我们基于D的估计，评估不同年份与旅游相关的集约化模式。在D之间可以发现重要的统计关联以及整个城市空间的旅游业集约化。旅游核心的集约化分布更均匀，但演变为空间组织的紧凑形式。另一方面，从旅游核心到周边，旅游集约化的同质化程度有所下降。事实证明，这种方法对于探索不同等级目的地的旅游集约化非常有用，例如里斯本和波尔图大都会地区。