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Indonesian Journal of Geography

ijg
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Published by Universitas Gadjah Mada

ISSN : 00249521 EISSN : 23549114 DOI : -

Core Subject : Science,

Earth & Planetary Sciences

Indonesian Journal of Geography ISSN 2354-9114 (online), ISSN 0024-9521 (print) is an international journal of Geography published by the Faculty of Geography, Universitas Gadjah Mada in collaboration with The Indonesian Geographers Association. Our scope of publications includes physical geography, human geography, regional planning and development, cartography, remote sensing, and geographic information system. IJG publishes its issues three times a year in April, August, and December.

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Articles 613 Documents

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Comparison Pan Evaporation Data with Global Land-surface Evaporation GLEAM in Java and Bali Island Indonesia Trinah Wati; Ardhasena Sopaheluwakan; fatkhuroyan fatkhuroyan
Indonesian Journal of Geography Vol 50, No 1 (2018): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

This paper evaluates the variability of pan evaporation (Epan) data in Java and Bali during 2003-2012 and compares to GLEAM (Global Land-surface Evaporation: the Amsterdam Methodology) data version v3.b namely actual evaporation (E) and potential evaporation (Ep) in the same period with statistical method. Gleam combines a wide range of remotely sensed observations to the estimation of terrestrial evaporation and root-zone soil moisture at a global scale (0.25-degree). The aim is to assess the accuracy of Gleam data by examining correlation, mean absolute error, Root mean square error and mean error between Epan and Gleam data in Java and Bali Island. The result shows the correlation between Epan with Ep Gleam is higher than Epan with E Gleam. Generally, the accuracy of Gleam data is a good performance to estimate the land evaporation in Java and Bali at annual and monthly scale. In daily scale, the correlation is less than 0.50 both between Epan with E Gleam and between Epan with Ep Gleam. In daily scale, the average errors ranging from 0.15 to 3.09 mm according to RMSE, MAE, and ME.The result of this study is essential in providing valuable recommendation for choosing alternative evaporation data in regional or local scale from satellite data.

Acceleration of Land Certification with Unmanned Aerial Vehicle in Toll Road Construction Area Bambang Edhi Leksono; Agoes Soewandito Soedomo; Levana Apriani; Nanin Trianawati Sugito; Atifah Rabbani
Indonesian Journal of Geography Vol 51, No 1 (2019): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Toll roads is one important component to improve the progress of a country, because with the addition of toll roads, the accessibility easier and can advance the economic movement. One of the toll road construction that is underway is construction of Cileunyi - Sumedang - Dawuan (Cisumdawu). The Cisumdawu Toll is prepared to tackle congestion on Jalan Cadas Pangeran and facilitate access to Kertajati International Airport. The construction of the Cisumdawu toll road itself is inseparable from land acquisition problems. Land acquisition is a process to purchase community-owned land which passed by toll road. Land acquisition requires a land certificate to facilitate legal affairs, unfortunately many land in rural areas do not yet have a certificate. This certification process can be assisted by unmanned aerial vehicle (UAV) technology to map parcel data. This research examines how UAV assist in the acceleration of certification for land parcels to be acquired.

Assessing the Potential of LAPAN-A3 Data for Landuse/landcover Mapping Zylshal Zylshal; Rachmad Wirawan; Dony Kushardono
Indonesian Journal of Geography Vol 50, No 2 (2018): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

LAPAN-A3 / LAPAN-IPB is the third generation of micro-satellite developed by Indonesian National Institute of Aeronautics and Space (LAPAN). The satellite carries a multispectral push-broom sensor that can record the earth's surface at the visible and near-infrared spectrum. Being launched in June 2016, there has no been many publications related to the use of LAPAN-A3 multispectral data for landuse/landcover (LULC) mapping. This paper aims to provide information regarding the use of LAPAN-A3 data for the LULC extraction maximum likelihood algorithm as well as neural network and then evaluate the results. The LAPAN-A3 image was geometrically corrected by using Landsat-8 OLI image as reference data. Three test areas with a size of 1200x945 pixels are then selected for pixel-based classification with the two aforementioned algorithms. For comparison, both LAPAN-A3 and Landsat-8 data were classified for 3 test areas. Accuracy assessment was performed on both datasets using manually interpreted SPOT-6 Pansharpened image as reference data. Preliminary results showed that LAPAN-A3 were able to extract 10 different LULC classes, comprises of built-up area, forest, rivers, fishponds, shrubs, wetland forests, rice fields, sea, agricultural land, and bare soil. The overall accuracy of LAPAN-A3 data is generally lower than Landsat-8, which ranges from 49.76% to 71.74%. These results illustrate the potential of LAPAN-A3 data to derive LULC information. The lack of necessary parameters to perform radiometric correction and blurring effect are several issues that need to be solved to improve the accuracy LULC.

Multidimensional Land-use Information for Local Planning and Land Resources Assessment in Indonesia: Classification Scheme for Information Extraction from High-Spatial Resolution Imagery Projo Danoedoro
Indonesian Journal of Geography Vol 51, No 2 (2019): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Suitable land-cover/land-use information is rarely available in most developing countries, particularly when newness, accuracy, relevance, and compatibility are used as evaluation criteria. In Indonesia, various institutions developed their own maps with considerable differences in classification schemes, data sources and scales, as well as in survey methods. Redundant land-cover/land-use surveys of the same area are frequently carried out to ensure the data contains relevant information. To overcome this problem, a multidimensional land-use classification system was developed. The system uses satellite imagery as main data source, with a multi-dimensional approach to link land-cover information to land-use-related categories. The land-cover/land-use layers represent image-based land-cover (spectral), spatial, temporal, ecological and socio-economic dimensions. The final land-cover/land-use database can be used to derive a map with specific content relevant to particular planning tasks. Methods for mapping each dimension are described in this paper, with examples using Quickbird satellite imagery covering a small part the Semarang area, Indonesia. The approaches and methods used in this study may be applied to other countries having characteristics similar to those of Indonesia

Well Water Site Selection at Local Scale Using Geographical Information System for Flood Victim in Malaysia Koh Liew See; Nayan Nasir; Saleh Yazid; Hashim Mohmadisa; Mahat Hanifah; A. Rahaman Zullyadini
Indonesian Journal of Geography Vol 50, No 2 (2018): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Clean water supply is a major problem among flood victims during flood events. This article aims to determine the sites of well water sources that can be utilised during floods in the District of Kuala Krai, Kelantan. Field methods and Geographic Information Systems (GIS) were applied in the process of selecting flood victim evacuation centres and wells. The data used were spatial data obtained primarily, namely the well data, evacuation centre data and flood area data. The well and evacuation centre data were obtained by field methods conducted to determine the position of wells using global positioning system tools, and the same for the location of the evacuation centres. Information related to evacuation centres was obtained secondarily from multiple agencies and gathered into GIS as an evacuation centre attribute. The flood area data was also obtained via secondary data and was digitised using the ArcGIS software. The data processing was divided into two stages, namely the first stage of determining the flood victim evacuation centres to be used in this research in a structural manner based on two main criteria which were the extent to which an evacuation centre was affected by the flood and the highest capacity of victims for each district with the greatest impact to the flood affected population. The second stage was to determine the location of wells based on three criteria, namely i) not affected by flood, ii) the closest distance to the selected flood victim evacuation centre and iii) located at different locations. Among the main GIS analyses used were locational analysis, overlay analysis, and proximity analysis. The results showed that four (4) flood evacuation centres had been chosen and matched the criteria set, namely SMK Sultan Yahya Petra 2, SMK Manek Urai Lama, SMK Laloh and SK Kuala Gris. While six (6) wells had been selected as water sources that could be consumed by the flood victims at 4 evacuation centres in helping to provide clean water supply, namely Kg. Keroh 16 (T1), Kg. Batu Mengkebang 10 (T2), Lepan Meranti (T3), Kg. Budi (T4), Kg. Jelawang Tengah 2 (T5) and Kg. Durian Hijau 1 (T6). With the presence of the well water sources that can be used during flood events, clean water supply can be distributed to flood victims at the evacuation centres. Indirectly, this research can reduce the impact of floods in the future, especially in terms of clean water supply even during the hit of a major flood.

Assessment the Relationship of Maternal Child Health Accessibility, Infant Mortality and Fertility in Sagar district, Madhya Pradesh Kalyan Sundar Som
Indonesian Journal of Geography Vol 51, No 1 (2019): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Equitable provision of health care services and full coverage of health accessibility are the major challenge for developing countries to achieve the sustainable development goal (SDG 3 and 10). A geographical information system (GIS) is an effective platform for knowing how much area and population are covered by the existing MCH (maternal child health) services network for better health care planning. The aim of this study is to assess the geographical accessibility of MCH services and how they give impact on infant mortality and fertility in Sagar District. To uncover the answer, this study used buffer zone analysis, service area analysis, and multiple regression analysis. The findings highlight lower accessibility has prevailed in the study area in which 41 percent village was underserved by the buffer zone analysis while 62 percent was underserved by the service area analysis out of 2075 village. It is diversified from higher accessibility in north western Khurai plain region to lower in the central upland exclude the Sagar community development Block. We also find that health accessibility can explain 53 percent of the infant mortality of the district and IMR may control 33 percent of the children ever born in the district.The service area and buffer mapped output may have policy implication for the future establishment of the health center and road network. This policy can be helpful for reducing infant mortality and fertility through this they achieved SDG target.

Monitoring Vegetation Change in the Dryland Ecosystem of Sokoto, Northwestern Nigeria using Geoinformatics Abubakar Magaji Jibrillah; Mokhtar Ja'afar; Lam Kuok Choy
Indonesian Journal of Geography Vol 51, No 1 (2019): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

The dryland ecosystem of Sokoto state, in the North-western part of Nigeria has been witnessing gradual loss of vegetation cover in the recent decades caused by natural and human induced drivers of ecosystem change. This negative trend poses great challenges to both the physical environment and the people of the area, particularly due to the fragile nature of the ecosystems in the region and the peoples’ over dependence on it for their livelihoods. This study tries to monitor and assess the rate of change in the spatial distribution of vegetation in the area over the time and identify the drivers responsible for changing the vegetation. This is with a view to providing evidence-based information to the policy makers that would guide them in making informed decisions that would assist in conserving the vegetation and the entire ecosystem of the area. Using multi-temporal MODIS-NDVI satellite data, image processing and GIS techniques, this research work tries to monitor and assess gradual change in vegetation cover in Sokoto state, North-western Nigeria. Correlation analysis was also used to measure the degree of relationship between vegetation change and some drivers of ecosystem change in the area. The findings of the research reveal a gradual but persistent decline in vegetation cover in the area, both during the rainy and dry seasons. This is also show a strong positive relationship with the rainfall distribution and a perfect negative relationship with the population distribution of the area. This indicate that, both climate change and anthropogenic drivers plays a significant role in changing vegetation distribution of the area. Anthropogenic drivers however, play a more significant influence. The degree of relationship is however, stronger during the dry season, making the ecosystem more vulnerable during the dry season due to increasing aridity. Although change in the vegetation cover of the area seems to be gradual and unnoticed, if left unchecked the long-term cumulative impacts could have serious negative impacts on both the structure and functions of the ecosystems of the area. This could in turn, affect the livelihoods and socio-economic development of the area.

The Risk Assessment of Multi Hazard Area: A Case of Mitigation Consider in Spatial Planning of Bukittinggi City Firmansyah Firmansyah; Deden Syarifudin; Jajan Rohjan
Indonesian Journal of Geography Vol 51, No 3 (2019): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

The city of Bukittinggi in West Sumatra Province is geographically prone to multi hazard. The located along the active fault line of Sumatra namely Ngarai Sianok that shifted eleven centimeters per year, which is surrounded by two volcanoes, namely Mount Singgalang and Mount Marapi. Looking at the potential of multihazard disasters, this study aims to analyze the multi-disaster that is the input for development policy. The method used to assess factors with Davidson standardization model and superimpose. To obtain the level of importance of disaster risk factors used weighting by using analytical hierarchy process method by expert judgement. The study results show areas at high risk for earthquake, landslide, fire and flood disasters and disaster mitigation measures to reduce risks to hazard, vulnerability and resilience factors. Contribution in this reseach that spatial multi-hazard consideration should be undertaken as a consideration of development policies in order to reduce disaster risk.

Urban sediment in infiltration wells: A lesson from the northern area of greater Yogyakarta city Slamet Suprayogi; Sudarmadji Sudarmadji; Muhammad Ngainul Malawani
Indonesian Journal of Geography Vol 51, No 3 (2019): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

The development of housing in Yogyakarta eventually led to increased levels of runoff. To mitigate runoff increases, infiltration wells were constructed in a specific network. The northern part of Yogyakarta is now facing urbanization, and there are many housing blocks that are being constructed complete with the runoff drainage system. This study aims to reveal the role of the infiltration wells network about runoff and its effectiveness concerning the sediment load in the urban area. The drainage networks in the research area function as a watershed, but not with a single outlet. The runoff flow was spreading through the drainage system and did not accumulate on the single outlet. It can be seen that some infiltration wells supposed as a well, which is a place of accumulation of runoff and sediment. Most of the infiltration wells have been filled with sediment up to over a quarter, or even more than half, of their carrying volume. Granulometry measurement shows that the percentage of clay, loam, sand, and gravel in each well tend to differ for every sample. The differences between filled wells and their sediment grain depend on the location of those wells. Maintenance of the wells is required, such as sediment dredging, to rejuvenate them and improve their efficiency.

Inter-Provincial Spatial Linkages of Crime Pattern in Indonesia: Looking at Education and Economic Inequality Effects on Crime Dian Trisnawati; Khoirunurrofik Khoirunurrofik
Indonesian Journal of Geography Vol 51, No 2 (2019): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Crime is one of social issues and it becomes spatial phenomenon as the inclination of crime rate in a particular region affecting its neighboring regions. This paper aims to explore the inter-provincial spatial linkages of crime rate in Indonesia and examine the effects of lack of education and economic inequality on criminal occurrences. Panel data of 33 provinces in Indonesia from 2007-2013 periods are explored and discover the existence of spatial linkages of crime rate among provinces. The spatial autocorrelation (SAC) model shows that the economic gap amid the society become the trigger for crime occurrence. Criminal actions are expected to increase as the Gini index is high since the inequality can make social jealousy is inevitable and triggering criminal actions. Furthermore, lack of education is also proven significantly in affecting crime rate, imply that education level may affect individual’s decision to commit criminal actions.

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