# Investigating Media-User Interaction for Public Play Space in a Smart City
## 2 Media City of Public Space and Spatiality of Play Space
### Case Analysis of Media City and Spatiality of Public Play Space  
The digilog strategy model for strengthening user participation in public play spaces is based on ICTs', and media interaction plays an essential role in media content communication connecting users and spatial relationships. In the case of the media facade of Diamond Bridge in Busan, it is an attraction visited by about 1 million tourists during the fireworks festival every year, which is a representative event, and it is a local place valuable city that not only highlights the characteristics of the place, but also actively expresses human activities [8] (Figure 4). Therefore, the characteristic of the urban brand value of local attractions is a community place that elicits empathy for users and a local place with a community network that connects users' lives [9]. When comparing the changes in landscape media signs before construction in 1993 and after 2003, the Diamond Bridge was highlighted as an active tourist attraction from the general landscape facility of Diamond Bridge in 1993 to Diamond Bridge Media in 2003 (Figure 4). Currently, in most coastal and urban landscapes, media facades that provide image information on landscape facilities and building facades have limitations in their visual information delivery methods. This is because they only deliver commercial visual information, not a public space with user participation. Instead of participating in the delivering the experience that users hope to obtain in a public space, they remain in the media space and are exposed to the media environment [5,10] (Figure 4). Therefore, the digilog strategy model should consider participatory media interaction using user devices. It is not simply a physical architectural appearance, but a media public communication space that establishes a relationship between the user and the public space. Media communication that establishes a relationship between the user and the public space should be  
Figure 4: The appearance of Diamond Bridge before the 1993 construction started and the landscape media facade after the construction started in 2003 at Gwangalli Beach, Busan. (**A,B**) general life information media color (2019), (**C**) BTS concert event period (2022), (**D**) Fireworks Festival (2018), (**E**) Drone Shows (2022), (**F**) Natural scenery before the construction of the Diamond Bridge. Figure 3: The ICTs’ future smart city planning presents a digilog strategic plan. communicated in the public space with feedback regarding the user's needs through manipulation and participation (Figures 3 and 5, Table 1). Therefore, for the digital technology and user participation place-oriented digital log strategy model, we intend to derive an interactive media model in a public play space to analyze user behavior with the keywords of open, participation, sharing, and cooperation (Figure 3, Table 1). As the criteria for model derivation, media interaction spatial type, and media-user interaction techniques, case analysis was conducted. As a result, as a type criterion, (A) the subjective intention of the designer or artist is conveyed visually in one direction, and (B) participation is drawn through interaction with the user [11] (Tables 1 and 2). (A), (B) The two types are divided into (a) screen, (b) facade, and (c) object media technology expression methods according to the physical architecture and object structure. It is the (a) screen, (b) facade, and (c) object media descriptions that are closely related to the surrounding environment of the public play space. The surrounding environment greatly influences media technology expression by light (Tables 1 and 2). Therefore, it is divided into projection mapping and multi-display (LED) technology as major categories. First of all, depending on the surrounding environment, projection mapping technology, which is mainly expressed indoors, is affected by the brightness of light, so it is effective in a dark room ((a) Screen).