## 1 Introduction  
Space syntax includes both a set of theories and tools for describing, analysing and understanding the spatial configuration of cities, buildings and spaces. The initial question posed by space syntax was whether the arrangement of urban forms had an impact on levels of street use, thereby developing an objective measurement investigating the complex relationship between the static, spatial attributes of cities and the dynamic patterns of human activity. At present, empirical studies have proven positive correlations between spatial configuration and the presence of pedestrians, proposing alternative approaches and measurements for walking via space syntax terms [1; 2; 3; 4; 5]. While using space syntax to investigate the patterns of pedestrian movement and walking behaviour is useful, it is often criticised as reductive and embodied in the premise that physics can explain almost everything [6]. Given this, we argue that such studies which focus on the relationship between static spatial configuration and dynamic pedestrian behaviour, characterise walkable space as ordered, measurable and unified, meaning that space is considered on the basis of a particular logic and rationale, but which may fail to take account of people's heterogeneous actions and behaviours in daily living. Recent studies note that street vendors as a characteristic feature of many neighbourhoods frequently appropriate spaces where many people regularly walk, particularly in many cities of the Global South [7; 8; 9; 10; 11]. The ubiquitous phenomenon of street vending attunes to time-related demands of a heterogeneous pedestrian body, leading to ever-changing spatial attributes, and its spatial distribution can be seen as an alternative way of mapping and understanding pedestrian movement [11; 12]. In other words, mapping street vending locations appears to be another way of subjectively understanding pedestrians and walking behaviour, which can be compared with the quantitative and objective approach of space syntax. Therefore, we are intrigued by understanding the nuance between the two phenomena of spatial configuration and street vending distribution in relation to pedestrian movement. Apart from investigating pedestrian movement, space syntax is used in obtaining an understanding of economic activity and land use value in a place. Prior to space syntax, most pedestrian movement models were thought to depend on the notion of 'attractors', such as shops and retail malls [13]. However, the proposition of 'natural movement theory' indicates that the configuration of the urban grid is the primary generator for human movement if other things are equal [14]. [PERSON] (1996) further proposed that urban spatial configuration impacts land-use distribution by attracting movement-seeking activities [15]. Land-uses, in turn, attract more movement, leading to a'spiral of multiplier effects' [16] (p. 5) or a 'positive feedback loop' [15] (p. 53). This cyclical process is called'movement economy'. For instance, one study in Santiago indicates that street market locations were almost three times more likely to be found in streets with the highest Integration/Choice values than the rest of the city on a global scale [17]. Another study in Beijing suggests that most food markets (89 out of 183) were registered at locally well-integrated streets (top 10% highest axial integration); with 12 markets directly opening onto streets with the top 20% highest Integration value within the middle-scale network [18]. Street vendors not only relate to pedestrian movement but also belong to urban economic activities. Some studies note that street vendors can perceive alternative features of physical settings in a specific place (e.g., time-related demands of emerging pedestrians), and they focus on local demands to operate an ephemeral and transient market space at the local scale [19; 20; 21; 22]. Namely, the static built environment and regular land use become uncertain and ever-changing caused by the temporal appearance of street vendors.