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Green Open Space (GOS) is an essential element in urban spatial planning that functions to maintain air quality and ecosystem balance. This research aims to analyze the influence of GOS on the concentration levels of Carbon Dioxide (CO2​) in the urban area of Jayapura City. The study locations were focused on two areas with distinct characteristics: Jalan Sam Ratulangi, which has high vegetation coverage, and Jalan Percetakan, which is dominated by built-up areas and dense commercial activity. The methods used include spatial analysis utilizing Landsat 8 satellite imagery Band 4 (Red) and Band 5 (NIR) to calculate the NDVI (Normalized Difference Vegetation Index), a vegetation time series analysis from 2019–2024, and direct CO2​ concentration measurements taken at three different times (morning, noon, afternoon). The data was processed using ArcGIS with the Kriging Interpolation method to generate spatial distribution maps of CO2​ in both locations. The results show that Jalan Sam Ratulangi has a GOS area of 6.13 ha (94%), while Jalan Percetakan has only 2.95 ha (31%). This difference significantly impacts CO2​ levels, with an average concentration of 484 ppm at Sam Ratulangi, which is lower than Percetakan's average of 567 ppm. The highest CO2​​ value at Percetakan reached 649 ppm during the afternoon, whereas Sam Ratulangi recorded only 488 ppm. This study proves that the wider and healthier the GOS, the lower the CO2​​ concentration detected. These results demonstrate that vegetation plays a significant role in reducing carbon emissions in urban areas, supporting the crucial role of GOS in maintaining air quality and supporting sustainable urban development in Jayapura City.

This community service activity aims to enhance the understanding of spatial perspectives in legal permitting processes among urban property developers. The main issue identified is the lack of knowledge regarding zoning and spatial planning, which often leads to permit rejections or illegal developments. The program was implemented through public education, technical training, and simulations using digital zoning maps. Evaluation results showed an average increase of 31.6 points in participants’ understanding from pre-test to post-test. Furthermore, over 70% of participants were able to access zoning portals and began drafting permit documents in accordance with the spatial plan. This program contributes to building legally aware developer communities, supporting orderly urban spatial planning, and promoting sustainable and participatory development.

This study aims to analyze the spatial distribution patterns and business characteristics of Coffee Shops in Wai Mhorock Sub-district, Abepura District, Jayapura City. The rapid growth of Coffee Shops in this area is influenced by its strategic location, situated near educational institutions, shopping centers, and social activity hubs. The research employs a quantitative approach with spatial mapping techniques using Geographic Information Systems (GIS) and field surveys to identify the characteristics of each business. The results show that the spatial distribution of Coffee Shops in Wai Mhorock tends to be clustered, with a high concentration along main roads and community activity centers. The characteristics of the businesses vary in terms of venue concept, types of menus offered, operational hours, supporting facilities, and target consumers. Most Coffee Shops target young people such as students and university attendees by offering a cozy atmosphere and free internet access. In conclusion, understanding the spatial patterns and business characteristics of Coffee Shops can serve as a foundation for sustainable urban spatial planning and business development. This study also provides recommendations for entrepreneurs and local governments to consider location, accessibility, and environmental impacts in managing commercial space.

Public Green Open Space (RTH) is an essential element in urban spatial planning to support environmental sustainability. Through the process of photosynthesis, RTH helps absorb carbon dioxide (CO₂) produced by human activities, such as transportation and industry, thus contributing to climate change mitigation. This study aims to explore the role of RTH in absorbing CO₂ and the challenges faced in its management. The study was conducted using a systematic approach through literature analysis and case studies in several cities in Indonesia and around the world. The research results indicate that vegetation type, area size, and environmental conditions are the main factors affecting the carbon absorption capacity of RTH. Large trees have a significantly higher capacity to absorb CO₂ compared to shrubs and grass, with the ability to absorb up to 250.63 tons of CO₂ per year per tree. However, challenges such as limited RTH area, urbanization pressure, and lack of public awareness remain obstacles to optimal RTH management. The recommendations of this study include increasing the area and quality of RTH through data-based strategies, community participation in management, and the development of policies that support sustainability. With proper management, RTH can function as a climate change mitigation tool while improving the quality of life for urban communities.  

Effective urban spatial planning is a key element in supporting sustainable urban development. Tangerang, as one of the rapidly growing urban areas, faces significant challenges due to conflicts between increasing population density and the need for green spaces as ecological balancing elements. This study aims to analyze the issues of urban spatial planning in Tangerang, focusing on the factors driving the conflict between population density and the provision of green spaces. A qualitative approach was used, involving secondary data analysis from urban spatial planning documents, government policies, and relevant literature reviews.The findings indicate that high urbanization rates, discrepancies in the implementation of spatial planning policies, and low public awareness of the importance of green spaces are the primary factors exacerbating the problem. Additionally, the lack of green spaces has negative impacts on environmental quality, such as rising urban temperatures, increased flooding, and a decline in residents' quality of life. As a solution, this study recommends integrating spatial planning strategies based on ecological approaches, including optimizing zoning policies, developing vertical gardens in densely populated areas, and enhancing community participation in green space conservation. These findings are expected to contribute to more sustainable urban spatial planning in Tangerang and other cities facing similar challenges.