Civil Engineering and Architecture 10(1): 1-11, 2022 http://www.hrpub.org DOI: 10.13189/cea.2022.100101 Assessment of Green Open Space in the Transit-Oriented Development Area in Jakarta T Endangsih 1,2,* , B Prayitno 3 , A Kusumawanto 3 1 Architecture Study Program, Faculty of Engineering, Budi Luhur University, Indonesia 2 Doctoral Program, Department of Architecture and Planning, Faculty of Engineering, Universitas Gadjah Mada, Indonesia 3 Departement of Architecture and Planning, Faculty of Engineering, Universitas Gadjah Mada, Indonesia Received June 11, 2021; Revised December 10, 2021; Accepted December 23, 2021 Cite This Paper in the following Citation Styles (a): [1] T Endangsih, B Prayitno, A Kusumawanto , "Assessment of Green Open Space in the Transit-Oriented Development Area in Jakarta," Civil Engineering and Architecture, Vol. 10, No. 1, pp. 1 - 11, 2022. DOI: 10.13189/cea.2022.100101. (b): T Endangsih, B Prayitno, A Kusumawanto (2022). Assessment of Green Open Space in the Transit-Oriented Development Area in Jakarta. Civil Engineering and Architecture, 10(1), 1 - 11. DOI: 10.13189/cea.2022.100101. Copyright©2022 by authors, all rights reserved. Authors agree that this article remains permanently open access under the terms of the Creative Commons Attribution License 4.0 International License Abstract The Jatinegara Station area has developed as a commercial area causing the surrounding residential areas to develop into dense settlements and have limitations in providing facilities and infrastructure, especially green open spaces. Along with the increasing intensity of commercial activities, this has an impact on changing green open spaces into built-up land. The purpose of this study was to examine the existing condition of green open space in the Jatinegara TOD area and then compare it with the standards set by the local government. The results of this comparison are used to provide input on the design of green open spaces in the research area. This goal is achieved by using a quantitative approach. The analysis of the need for green open space is calculated based on the standard of 30% of the total area. The need for green open space is 20 m 2 per person and the Gerarchis method is used to calculate the need for green space based on oxygen demand. The analytical method used in this research is descriptive quantitative analysis. As the first step is to identify the characteristics of green open space, analyze the availability of green open space and its form and typology. Based on the results of the study, it can be concluded that the availability of green open space affects the environmental quality of the TOD area. The form and typology of green open spaces found in the study area are urban forest green open spaces and sub-district environmental parks. Therefore, the existence of green open spaces needs to be maintained through the development and arrangement of green open spaces by taking into account the types of vegetation that can absorb CO 2 . Keywords Gerarkis, Total Population, Area, O 2 , Green Open Space 1. Introduction The growth of big cities in Indonesia at this time tends to be urban sprawl, which results in further travel and longer travel times. This growth is experienced by the City of Jakarta as a Metropolitan City and it's a satellite city which is currently in the process of becoming a Megapolitan City, so that it will cause environmental problems that are very diverse and complex, one of which is air pollution as a result of the use of motorized vehicles as the main means of transportation, be it work, school, or shopping. Where they live outside Jakarta with their daily activities or activities carried out in Jakarta. Thus the transportation of Jakarta and its surrounding satellite cities form a very close dependence and connection. Based on the Jakarta report in 2020 figures, the population of DKI Jakarta reached 10.56 million, an increase of 9.9% compared to the previous census results in 2019. If population growth is not controlled, the need for facilities will be even higher. Physical development is towards the maximum, while on the other hand, the development of open space is towards the minimum, thus changing the face of the whole city. The direct result of the imbalance between the built environment (built) and the protected environment (nature) causes a decrease in the quality of the urban environment