Indonesia's urban green spaces dilemma: Balancing law,ecology,and public space,highlighting Jakarta

What happens when green space becomes a legal number rather than a living ecology?

Indonesia's urban laws require every city to dedicate 30% of its territory to Green Open Spaces (GOS)—a target intended to secure ecological balance and public well-being (Government of the Republic of Indonesia, 2007). Yet in practice, this number has become more symbolic than substantive. In cities like Jakarta, where density, land scarcity, and political competition make such allocation nearly impossible, the mandate survives through “creative interpretation” such as roadside strips, cemeteries, and ornamental landscaping are all counted as GOS (Wijaya and Christianti, 2025; Xing and Brimblecombe, 2020). What was meant as ecological preservation has become an arithmetic of legitimacy.

This paradox reveals a deeper question that extends far beyond Indonesia: When law defines space, does ecology disappear?

Urban geography has long understood “space” as more than measurable land—it is a social, political, and ecological construct (Harvey, 1973; Lefebvre, 1991). Yet planning frameworks often reduce it to quantifiable surfaces (Duivenvoorden et al., 2021; Panjaitan et al., 2022). Indonesia's green space law exposes this tension in extreme form: the legal abstraction of space transforms environmental ethics into bureaucratic metrics, where “greenness” can exist without ecological substance (Bisani et al., 2024; Zamanifard et al., 2018).

Jakarta illustrates the contradictions that arise from this abstraction. Despite repeated policy commitments and international sustainability rhetoric, the city's green coverage remains at 5.5% based on official data (DKI Jakarta Provincial Government, 2026). The gap between the legal ideal and material reality is not merely a failure of implementation, it is the result of a conceptual conflation. The law collapses ecological space (Jones, 2018) and public space (Duivenvoorden et al., 2021) into a single, undifferentiated category—treating both as interchangeable instruments of urban order. In doing so, it legitimizes the symbolic presence of greenery without addressing either ecological resilience or spatial justice.

This debate argues that Indonesia's GOS framework exemplifies a broader governance dilemma of urban modernity, when ecological intent is absorbed into legal form, cities produce spaces that appear sustainable but functionally hollow. Rather than asking whether Jakarta can meet its 30% target, we must ask what kind of “space” is being produced under this mandate—and for whom.

By reading Indonesia's green space policy through urban theory, this piece situates the dilemma within the politics of abstraction: how the production of law, the esthetics of compliance, and the discourse of sustainability converge to redefine “green” as a bureaucratic achievement rather than an ecological or social practice. Jakarta is not simply an exception but an exemplary case of how law and ecology become entangled in the making of urban legitimacy.

When law becomes landscape: How the 30% mandate constructs space

Jakarta's GOS regime operates through a hierarchical legal “cascade” that translates national environmental ambition into local land-use controls. At its apex, Law No. 26/2007 on Spatial Planning establishes the 30% quota as a national standard, which is operationalized through Government Regulation No. 21/2021 requiring local governments to embed the target in their planning instruments (Government of the Republic of Indonesia, 2007). In Jakarta, this mandate is localized through the Regional Spatial Plan 2030 (RTRW 2030), the provincial macro-plan that designates general green zones across the city. This structure legally anchors local ecological obligations in national law, creating top-down pressure to reconcile urban growth with the preservation of formally designated green territory.

The decisive translation occurs at the micro scale of the Detailed Spatial Plan (RDTR), currently governed by Governor Regulation No. 31/2022. Here, the abstract 30% mandate is converted into parcel-level controls, assigning each plot a Green Area Ratio and specific zoning designations that condition the issuance of building permits. By embedding the national quota into technical land parameters, the RDTR attempts to bridge state-level environmental goals with the realities of a hyper-dense metropolis. Yet where land values are high and space scarce, this translation often produces symbolic compliance, as ecological requirements are minimized or formalized without substantially altering urban form.

The law's definition of GOS—“an elongated or clustered area used as a place for plants to grow, whether naturally or intentionally planted”—reduces the idea of space to surface. The Indonesian term ruang (space), which in spatial law functions as a wadah—container—of social and ecological processes, is rendered flat by the qualifier “elongated/linear.” What once implied an ecosystem becomes a line on a map. This linguistic move quietly shifts the legal imagination of space from an ecological medium to a visual category, legitimizing roadside strips, medians, and ornamental lawns as sufficient representations of “green.”

Subsequent regulations reinforced and deepened this abstraction. Regulation of the Minister of Public Works No. 05/PRT/M/2008 operationalized GOS provision by dividing its functions into intrinsic (ecological) and extrinsic (social, cultural, economic), ostensibly prioritizing ecology while simultaneously legitimizing its dilution. In practice, plazas, sports fields, cemeteries, road buffers, and even medians could all be counted toward statutory targets, stretching the meaning of ruang to include spaces that are neither socially accessible nor ecologically substantial. The mandate thus shifted from preserving urban “lungs” to administratively assembling qualifying categories—meeting percentages through definitional elasticity rather than material greening (Ministry of Public Works of the Republic of Indonesia, 2008).

This elasticity was further institutionalized by Ministerial Decree No. 14/2022, introduced amid persistent difficulty in achieving the 30% quota mandated under Law No. 26/2007 on Spatial Planning. While rhetorically advancing a holistic, multifunctional paradigm through the Indonesia Green-Blue Index, the decree reframed GOS from a purely land-based metric into a performance-oriented system that places ecological, economic, and sociocultural functions on equal footing. Ecologically, it promotes the integration of green and blue infrastructures for flood mitigation and microclimate regulation; economically and socially, it positions GOS as productive and communal space, aligned with a community-based collaborative public space. Yet this functional turn simultaneously formalized compromise by recognizing Non-GOS—hardened areas paved with “eco-friendly” materials—alongside green paths, medians, vertical greenery, and porous pavements as countable GOS components. In doing so, the decree enables quality-based supplementation of scarce land resources, but also opens the possibility that technical compliance through engineered surfaces may substitute for the substantive ecological capacity that the 30% mandate originally envisioned (Government of the Republic of Indonesia, 2022; Ministry of Agrarian Affairs and Spatial Planning/National Land Agency of the Republic of Indonesia, 2022), thus naturalizing flexibility as virtue and translating ecological ideals into technical scoring systems and bureaucratic accommodation—so that the stronger the mandate appeared symbolically, the weaker it became in ecological precision, satisfying statutory thresholds on paper while leaving substantive ecological capacity largely unchanged.

Jakarta's spatial governance makes this dynamic visible. Confronted with density, speculative land markets, and administrative fragmentation, the city reinterprets the 30% target through legal creativity (Governor of the Special Capital Region of Jakarta, 2022). Road buffers, riverbanks, and cemetery grounds are recoded as GOS polygons in official plans, transforming dispersed fragments into a statistical achievement. Here, legality operates as landscape production: a city that fails to preserve ecology can still produce “greenness” on paper.

This is not a uniquely Indonesian paradox. It is symptomatic of what urban theorists describe as the technocratic production of space—where the politics of measure replaces the politics of meaning (Collier and Gruendel, 2022; Osterberg-Kaufmann et al., 2020). In Lefebvre's terms (1991), the conceived space of planners and lawmakers dominates the lived space of ecological and social relations. By setting an abstract quota detached from context, the law privileges formal compliance over material ecology. The same logic, as Harvey (1973) would note, displaces spatial justice, the quota can be met through private gardens in gated districts as easily as through public parks in low-income areas.

Thus, Indonesia's 30% rule should not be read merely as an environmental regulation but as a discursive technology—one that produces a visible, reportable “green city” while obscuring the uneven and fragile realities of urban nature (Gibney and Shannon, 2018; Jones, 2018; Kuklina et al., 2021; Yan et al., 2024). The law transforms greenness from a relational process into a visual sign of governance competence. This symbolic elasticity explains why Jakarta's official green cover can expand without improving ecological function or public access.

What emerges from this legal architecture is a tension between ecological intent and bureaucratic performance. The law aspires to preserve nature but operates through instruments of representation—maps, ratios, and classifications—that privilege appearance over substance. Once space is legislated as percentage, its ecological and social meanings become subordinated to measurability. The 30% figure, while rhetorically powerful, becomes a mirror reflecting the state's desire to appear sustainable rather than its capacity to nurture living ecologies.

Jakarta as the lived paradox of green space

If Indonesia's laws have transformed green space into a matter of legal appearance, Jakarta is where this abstraction acquires its most vivid spatial form. The capital's struggle to meet the 30% mandate is less a story of administrative failure than of structural impossibility. In a metropolis of 11 million people packed into 662 km², every hectare of land carries multiple, conflicting claims—housing, infrastructure, commerce, and governance. Within such an urban metabolism, “setting aside” 30% for nature is an aspiration that collides with political economy.

Unable to reconcile the law's numeric ideal with spatial reality, Jakarta's planners resort to creative compliance. Roadside medians, riverbanks, and cemetery grounds are mapped as “GOS” in spatial plans, transforming infrastructural remnants into indicators of sustainability (Governor of the Special Capital Region of Jakarta, 2022). These fragments, dispersed and inaccessible, function more as signs of greenness than as living ecologies or social commons. A tree-lined traffic corridor or a fenced-off memorial ground can now carry the same legal weight as an urban forest (Wijaya and Christianti, 2025).

This practice produces what might be called cartographic greenwashing—a phenomenon where “green” proliferates in maps, not in matter. The city's satellite images appear increasingly verdant, yet ground-level experience tells another story: heat intensifies, air quality declines, and genuine public parks remain rare and unevenly distributed (Jones, 2018; Kurniawan et al., 2025; UN Habitat, 2025). The North and Central districts, home to dense working-class settlements, possess the least greenery; the South, characterized by private gardens and gated communities, contributes disproportionately to the city's “green” statistics. The result is geography of environmental privilege: the law's quantitative justice masks profound qualitative inequities.

Jakarta's paradox also exposes how urban law, when detached from ecology, becomes a tool of political legitimation. Announcing progress toward the 30% target allows the state to perform sustainability, even as its ecological base erodes. This “performative governance” relies on visibility—what can be counted, mapped, or inaugurated. The governor's ribbon-cutting at a new plaza, even if paved and ornamental, satisfies the demand for progress. Citizens see green, the state sees compliance, and ecology remains silent.

These tensions are not unique to Jakarta, but the city amplifies them through its scale and symbolic role as Indonesia's urban showcase. It embodies the contradictions of global sustainable urbanism, where metrics of green coverage substitute for ecological vitality and esthetic politics outpace environmental ones. This reflects what Lefebvre (1991) describes as the dominance of conceived space, in which abstract representations govern and suppress lived ecological relations.

Jakarta does not simply fail to meet its 30% GOS target; it redefines what “green” means. Through legal abstraction and planning instruments, greenery is reduced to decorative roundabouts, memorial lawns, and roadside medians, turning ecological planning into esthetic accounting. Understanding Jakarta's GOS dilemma therefore requires shifting from how much green exists to what kind of greenness is institutionalized—one in which ecology survives mainly as symbol, the 30% target legitimizes overurbanization, and green space mediates state imagery more than human–nature relations.

The abstraction of space and the disappearance of ecology

The paradox of Indonesia's green space law stems from the way abstraction becomes authority. When the law defines “green space” as a quantifiable percentage, it transforms space into data. The ecological, social, and sensory dimensions of urban nature are subordinated to a number that can circulate across reports, maps, and plans. What counts is not whether a city sustains life, but whether it satisfies ratio.

This process can be understood through Lefebvre's (1991) theory of the production of space, which distinguishes among conceived space (the abstract, technocratic representations of planners), perceived space (the material configuration of the city), and lived space (the everyday experience and appropriation of space by residents). Indonesia's 30% GOS mandate exemplifies conceived space: a bureaucratic and mathematical abstraction that homogenizes the city into measurable units, defining what space should be without attending to what space does. In Jakarta, this abstraction collides with perceived space—an already overbuilt metropolis marked by land scarcity—and with lived space, where citizens experience a chronic lack of accessible, quality greenery. The result is a structural contradiction: rather than transforming urban ecology, the quota pressures the state to “green” whatever fragments can be legally classified as GOS—cemeteries, roadside strips, fenced lawns, engineered surfaces—thereby distorting the meaning of GOS. Even community-oriented initiatives such as RPTRA (Child-Friendly Integrated Public Space) and Taman Maju Bersama (a community-based collaborative public space), which function as vibrant lived spaces and partially reclaim the city from abstraction, must ultimately be translated back into percentages and categories. In this sense, the mandate generates what might be called representational ecology: environments that satisfy statistical and visual criteria on paper while leaving the deeper ecological metabolism of the city largely unresolved.

In Jakarta, this abstraction manifests materially. The city's official maps show a patchwork of green polygons that symbolize compliance, but these patches are disconnected, minimal, and often inaccessible. They embody the triumph of what Lefebvre called abstract space—a space that is homogeneous, fragmented, and governed by metrics rather than by relations. The ecological processes that sustain urban life—soil permeability, species diversity, hydrological flow—cannot be captured by the law's geometry, and thus, they vanish from its logic.

Harvey's (1973) idea of spatial justice, the issue is not merely how much green space exists, but who controls it, who can access it, and who bears responsibility for its provision. Jakarta's green quota regime formally divides obligations into 20% public and 10% private GOS, yet this numerical symmetry obscures a profound asymmetry in spatial distribution and institutional capacity. Private green areas within elite housing complexes and commercial estates readily fulfill the 10% mandate, but they are gated, exclusionary, and designed to enhance property value rather than collective well-being. In contrast, high-density kampungs (densely populated, low-rise settlements) and informal settlements—where ecological need is often greatest—remain structurally underserved. Here, the local government struggles to secure land for the 20% public provision, while the private mandate is effectively unenforceable due to tenure informality and extreme density.

Viewed through David Harvey's lens of the “Right to the City” and accumulation by dispossession, this arrangement generates a geography of exclusion in which ecological amenities cluster within affluent enclaves where greenery enhances land value, while poorer districts endure “green vacuums,” allowing legal compliance to coexist with material injustice. The law's generic metropolitan targets mask neighborhood-level inequities, enacting a fetish of fairness whereby proportional percentages stand in for substantive equity—formal justice without material justice. Simultaneously, the abstraction of space fosters an esthetic regime of planning that Jacobs (1961) would likely critique: instead of diverse, accessible, human-scale environments, green space becomes a bureaucratic unit divorced from everyday life. Ornamental lawns, fenced medians, and manicured plazas operate as monuments of compliance—designed to be seen rather than lived—translating ecological complexity into visual simplicity (Yang et al., 2025) and producing a city that appears sustainable even as it overheats.

Taken together, these theoretical perspectives illuminate the ontological loss embedded in Indonesia's green space policy. By treating space as a measurable object, the law severs the connection between representation and experience. Ecology becomes appearance. Public space becomes property. Sustainability becomes a spreadsheet.

Jakarta's paradox is thus not merely bureaucratic but philosophical: the city is not simply failing to meet the quota; rather, the law itself fails to conceptualize space ecologically, so that the more generic its definition becomes, the grayer the landscape grows—both materially and semantically—as “green” turns into an adjective detached from life. This abstraction fosters a particular urban blindness in which environmental success is equated with visibility—trees planted, square meters tallied—while the invisible processes that sustain ecosystems are neglected, ironically erasing the ecological knowledge the policy seeks to institutionalize. Ultimately, the 30% rule exposes a deeper tension in urban governance between the epistemology of measurement and the ontology of space: measurement promises control, comparability, and legitimacy, whereas space resists quantification through its social complexity and nonhuman entanglements. When measurement prevails, cities generate landscapes that are politically reassuring yet ecologically shallow—not the absence of green, but the proliferation of simulated nature that certifies governance while impoverishing life.

Between ecology and legitimacy: The dilemma of urban green space

At the heart of Indonesia's GOS policy lies a collision of two rationalities: ecological imperatives and political legitimacy. Both claim moral authority, both demand visibility. Yet when compressed into a single legal framework, they undermine each other. The result is a planning system that performs ecology for public reassurance while quietly eroding its substance.

Originally, GOS was conceived as an ecological safeguard. Law No. 26/2007 envisioned a network of urban vegetation that would moderate temperature, absorb water, and sustain biodiversity (Government of the Republic of Indonesia, 2007). In a country increasingly vulnerable to climate extremes, this ecological ambition was both necessary and visionary. But the law's promise of a “public” share—20% of urban land accessible to all—introduced a second, more populist dimension, the democratic right to open space. In principle, these two logics could coexist. In practice, they began to compete.

In Jakarta, that competition is visible in every new park, plaza, and landscaped median. City governments pursue projects that are publicly legible—parks that can be opened, photographed, and circulated—rather than ecologically consequential. Ecological restoration, which requires patience, maintenance, and often invisibility, cannot compete with the optics of inauguration. Thus, publicness becomes a political performance: to be seen as providing space replaces to act as preserving ecology.

This tension reveals what could be called the spectacle of green governance. Each newly planted plaza satisfies a civic desire for order and cleanliness, projecting an image of sustainability compatible with middle-class aspirations. Yet these same spaces often displace informal commons, restrict biodiversity, and increase surface heat through excessive paving. The city's ecological metabolism slows even as its symbolic greenery expands. As long as the landscape appears orderly, the illusion of progress endures.

Citizens, too, are drawn into this spectacle. The right to green space—an understandable demand in a suffocating metropolis—becomes conflated with the right to beautification. Trees and lawns signify urban civility; wild vegetation and unprogramed soils appear as disorder. In this social imaginary, ecology becomes aestheticized, and care becomes control. The law's fusion of ecological and social functions thus reshapes not only governance but public perception: green becomes a visual code of modernity rather than an ecological condition.

This dynamic also exposes the limits of Indonesia's sustainability discourse. Borrowing language from global frameworks such as the Sustainable Development Goals and the New Urban Agenda (Alpenberg et al., 2019; Jones, 2018; Owusu-Manu et al., 2020; UN Habitat, 2025), the GOS mandate positions itself within an international consensus on “resilient cities.” Yet its local enactment reveals the fragility of that consensus. The global language of inclusion and balance conceals a national preoccupation with compliance. What circulates upward is not ecological resilience but evidence of alignment—maps, reports, photographs—feeding an administrative desire for international legitimacy.

In theoretical terms, this dynamic marks a collapse between ecological and representational rationalities: the law attempts to serve both nature and nation, universalizing ecological responsibility through percentages while dramatizing political competence through visible parks and medians. Yet in fusing these imperatives, it conflates their ontologies—ecology operates through cycles, thresholds, and resilience, whereas politics operates through visibility, narrative, and performance—so that the 30% quota becomes the site where these logics collide and their contradictions are materially inscribed in urban space. Seen from this perspective, Jakarta's landscape reads as a living text of compromise, where ecological buffers are re-scripted as civic stages (Chen et al., 2024), highly visible parks often prove least ecological, and more functional remnants—mangroves, riverbanks, unpaved kampung gardens—remain marginalized or undervalued (Aristyowati et al., 2024). The result is a political ecology of legitimacy in which nature is mobilized less to sustain life than to certify governance.

Yet, to treat this as a uniquely Indonesian dilemma would miss its broader resonance. The conflation of ecology and legitimacy is an increasingly global urban condition. Across Asia, Africa, and Latin America, cities pursue green certification, eco-districts, and sustainability metrics that privilege measurability over metabolism (Dollah et al., 2023; Jones, 2018; Kuklina et al., 2021; Kurniawan et al., 2025; Owusu-Manu et al., 2020; Wijaya and Christianti, 2025). What Jakarta makes explicit is the philosophical cost of that pursuit: when ecology is folded into law, and law into optics, the meaning of “space” itself changes. Space ceases to be a field of coexistence and becomes a stage of compliance.

The way forward, then, is not to abandon quotas but to repoliticize space beyond measurement. Cities need frameworks that distinguish—yet carefully relate—the ecological and the civic (Collier and Gruendel, 2022; Slave et al., 2025). Some spaces must privilege ecological integrity even when they lack social visibility; others must prioritize accessibility while acknowledging ecological limits. Treating all green as one collapses both. To move beyond the current paradox, urban governance must restore difference to the concept of space: difference between life-supporting systems and life-affirming places.

In this sense, Jakarta's failure is instructive rather than exceptional. It reminds us that the challenge of urban sustainability lies not only in implementation but in imagination. As long as green space remains defined by numbers, reports, and maps, it will remain politically successful and ecologically fragile. True reform begins not with more greenery, but with a redefinition of what we mean by space—from something to be counted, to something to be cared for.

Conclusion: Beyond green quotas, toward spatial care

Jakarta's struggle to fulfill the 30% green space mandate reveals a paradox at the heart of contemporary urban governance: the city's maps are greener than its streets, its rhetoric richer than its soil. What began as an ecological safeguard has devolved into a bureaucratic spectacle in which the appearance of compliance eclipses the substance of care. This contradiction is not merely administrative but ontological, exposing how legal abstractions convert ecology into representation and, in doing so, redefine what counts as “green.” Within Indonesia's planning framework, GOS signifies a ratio rather than a relation, translating soil, water, and vegetation into measurable percentages presumed universally applicable, even though space is always produced through uneven histories and socioecological interdependencies (Slave et al., 2025). Jakarta exemplifies this epistemological drift: roadside medians, decorative plazas, and fenced lawns privilege green visibility over ecological function, rendering the city greener in imagery yet grayer in lived reality—landscapes that pose rather than breathe (Hu et al., 2024). At a deeper level, the 30% quota becomes a political ritual of reassurance, enabling the state to signal alignment with global sustainability norms while sidestepping structural inequalities; when citizens demand parks, governments supply countable, photogenic surfaces, producing a regime of green performativity in which visibility ultimately eclipses vitality.

To move beyond symbolic compliance, Jakarta's GOS policy must shift its underlying logic from accumulation to coverage. The central question is no longer “how much green space is provided?” but “to what extent urban residents are actually covered by it in their everyday environment.” The 30% mandate, while effective as a bureaucratic key performance indicator (KPI), reflects a form of spatial idealism that assumes large areas of land can be readily allocated for green space—an assumption that does not hold in Jakarta's high-density reality. As a result, the policy risks prioritizing measurable achievement over actual environmental presence.

Under these conditions, relying on extensive and continuous green surfaces is neither realistic nor necessary at the neighborhood scale. What Jakarta requires is not the maximization of green area, but the sufficient distribution of accessible and functional green spaces that can sustain local environmental conditions. This position may appear, at first glance, to carry a populist undertone, as it prioritizes everyday accessibility over aggregate territorial targets. However, this framing is not incidental. In this sense, GOS should be understood as a fundamentally populist spatial provision—a form of space that is expected to be delivered by the state and experienced directly by residents in their daily lives. Proximity, therefore, is not a rigid planning requirement, but a way to reveal whether this provision is truly realized—for instance, whether green space can be reached within a 5–10 min walk (approximately 300–500 m) from where people live. A city may satisfy its KPI in aggregate terms, yet remain effectively uncovered where it matters most. In dense kampung environments, green space that is distant, fragmented, or inaccessible is, in practical terms, absent.

At the same time, the issue is not only how much GOS exists, but how it is administratively recognized and reported. Jakarta's current framework allows a wide range of spaces to be counted as GOS without sufficient consideration of their ecological capacity or public accessibility, enabling bureaucratic accomplishment without ensuring substantive performance. The core problem lies in the absence of a clear baseline for what qualifies as GOS. The proposed weighted functional ratio addresses this by differentiating spaces based on ecological performance and social function. For illustration, a site may be assessed using a weighted ratio (e.g. 60:40 between ecological and social aspects), where a fully accessible, vegetated park approaches full recognition, while a fenced strip or ornamental median receives only partial credit. This ratio is not fixed, but demonstrates how differentiation can be operationalized. In doing so, it restores a minimum standard to GOS and ensures that reported provision more accurately reflects ecological function and public use.

Ultimately, Jakarta's paradox is an invitation. It urges us to confront a broader disciplinary complacency: the assumption that what is measurable is also meaningful (Howes, 2012). The urban future will not be secured by more trees per capita or higher green ratios, but by the ability of cities to sustain the fragile interdependence between ecology, justice, and imagination. To care for space, then, is not to count it but to inhabit it—to let it breathe, decay, and renew beyond the reach of quotas.