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SYNERGY APPROACH FOR IMPLEMENTING THE POLICY ON HIGH RESOLUTION IMAGERY TO ACCELERATE BASIC AND THEMATIC GEOSPATIAL INFORMATION

International Journal of Remote Sensing and Earth Sciences (IJReSES) Vol 11, No 1 (2014)
Publisher : National Institute of Aeronautics and Space of Indonesia (LAPAN)

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Abstract

Presidential Order no. 6/2012 mentioned explicitly to use ortho-rectifed image for the purposes of national program done by all Indonesian governmental agencies. Policy of uses, control quality, processing and distribution of high resolution of satellite data are regulated by this Order. There are some advantages of implementing this Order particularly in accelerating the national geospatial data and information, however, without synergy use of high resolution imagery (including integration, coordination and harmonization), in the present condition so far some obstacles have been discovered.  Without  synergic actions or approaches, the Order will not provide optimal impact as the main objectives to make more efficient in using the national budget. This article describes the needs of synergy approach to implement the Presidential Order no. 6/2012 concerning the uses, distribution of high remotely sensed imageries.

Application of Vector Auto Regression Model for Rainfall-River Discharge Analysis

Forum Geografi Vol 29, No 1 (2015): July 2015
Publisher : Universitas Muhammadiyah Surakarta

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Abstract

River discharge quantity is highly depended on rainfall and initial condition of river discharge; hence, the river discharge has auto-correlation relationships. This study used Vector Auto Regression (VAR) model for analysing the relationship between rainfall and river discharge variables. VAR model was selected by considering the nature of the relationship between rainfall and river discharge as well as the types of rainfall and discharge data, which are in form of time series data. This research was conducted by using daily rainfall and river discharge data obtained from three weirs, namely Sojomerto and Juwero, in Kendal Regency and Glapan in Demak Regency, Central Java Province. Result of the causality tests shows significant relationship of both variables, those on the influence of rainfall to river discharge as well as the influence of river discharge to rainfall variables. The significance relationships of river discharge to rainfall indicate that the rainfall in this area has moved downstream. In addition, the form of VAR model could explain the variety of the relationships ranging between 6.4% - 70.1%. These analyses could be improved by using rainfall and river discharge time series data measured in shorter time interval but in longer period.

Application of Vector Auto Regression Model for Rainfall-River Discharge Analysis

Forum Geografi Vol 29, No 1 (2015): Forum Geografi
Publisher : Forum Geografi

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Abstract

River discharge quantity is highly depended on rainfall and initial condition of river discharge; hence, the river discharge has auto-correlation relationships. This study used Vector Auto Regression (VAR) model for analysing the relationship between rainfall and river discharge variables. VAR model was selected by considering the nature of the relationship between rainfall and river discharge as well as the types of rainfall and discharge data, which are in form of time series data. This research was conducted by using daily rainfall and river discharge data obtained from three weirs, namely Sojomerto and Juwero, in Kendal Regency and Glapan in Demak Regency, Central Java Province. Result of the causality tests shows significant relationship of both variables, those on the influence of rainfall to river discharge as well as the influence of river discharge to rainfall variables. The significance relationships of river discharge to rainfall indicate that the rainfall in this area has moved downstream. In addition, the form of VAR model could explain the variety of the relationships ranging between 6.4% - 70.1%. These analyses could be improved by using rainfall and river discharge time series data measured in shorter time interval but in longer period.

Penyediaan Data Dasar dalam Pengembangan Kota

Forum Geografi Vol 9, No 1 (1995)
Publisher : Forum Geografi

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Abstract

Ketersediaan data dasar dalam pengembangan kota sangat diperlukan baik dalam rangka perencanaan tata ruang tingkat nasional, propinsi, maupun kabupaten/kotamadia. Hal ini mendukung amanat dalam GBHN 1993 bahwa pembangunan perkotaan ditingkatkan dan diselenggarakan secara berencana dan terpadu dengan memperhatikan rencana umum tata ruang, pertumbuhan penduduk, lingkungan permukiman, lingkungan usaha, dan lingkungan kerja serta kegiatan ekonomi dan kegiatan sosial lainnya agar terwujud pengelolaan perkotaan yang efisien dan tercipta lingkungan yang sehat, rapi, aman, dan nyaman. Permasalahan data dasar dalam perkembangan daerah perkotaan antara lain adalah data dasar dan peta dasar yang belum seluruhnya baku, dan data dasar sumberdaya alam, sumberdaya buatan, dan sumberdaya sosial ekonomi yang sangat dinamis. Pemutakhiran data dasar dan penyusunan basis data digital secara terpadu pada tingkat nasional, propinsi, dan kabupaten/kotamadia perlu terus dikembangkan.

Providing of Spatial Wetland Information for Supporting National Development

Forum Geografi Vol 20, No 2 (2006): December 2006
Publisher : Universitas Muhammadiyah Surakarta

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Abstract

The wetland has a strategic role in national development. The potential uses of the wetland are varied such as for agriculture, fisheries, industries, and forestry. The intensive use of the wetland for agricultural development in Sumatera, Kalimantan, Sulawesi, and Papua through transmigration projects has been run since in 1973. Unfortunately, not all the projects were well developed, causing the social, economic, and physical environmental problems. These problems resulted in the negative impact for the life of the transmigration people. For that reason, the community empowerment for the unlucky transmigration people by handling the physical and non physical aspects is very important. This paper will describe the importance of providing spatial data and information biophysical wetland as an initial step in empowering people who live in the wetland resource.

ASSESSMENT OF THE RICE FIELD SUSTAINABILITY IN JAVA ON BASIS OF REGIONAL SPATIAL USE PLANNING (RTRW)

GEOMATIKA Vol 16, No 1 (2010)
Publisher : Badan Informasi Geospasial in Partnership with MAPIN

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Abstract

The problems of the rice field sustainability in Java as the national rice producer are induced by the rice field land conversion into settlement and industrial areas due to the increase of population. The rice field conversion causes the decrease of both land quantity and quality. As mentioned in Act Number 26/2007 concerning Spatial Use management, the goal of implementing the spatial use management is to achieve the protection of spatial use function and the prevention of the negative impacts of the environment resulted from the spatial use implementation. The objective of this study is to assess the consistency of the governmental policies in implementing the Act Number 26/2007 to achieve the rice field sustainability on the basis of agro-ecological concept. By using the GIS modelbase, the rice field agro-ecological zones proposed as standard rice field areas for the benchmark of the sustainable rice field agriculture management system were synthesized from the spatial database of land system, land cover, area status, agro-climate, irrigation condition, social and culture integrated in the administration boundary layers. The results show that the governmental policies from non-agricultural sector in allocating the area status of the settlement areas as presented at the provincial regional spatial use planning map (RTRW map) have not fully consistent to the regulations as stated in Act Number 26/2007 for protecting the productive rice field function as the national rice producer. The potential loss of the rice production caused by the implementation of the rice field conversion into settlement areas allocated at the productive rice field agro-ecological zones is predicted 3.5 million tons per year.Key words: rice field agro-ecological zone, spatial use management, GIS modelbase, land conversion.ABSTRAKMasalah keberlanjutan lahan sawah di Jawa sebagai lumbung beras nasional dipicu oleh konversi lahan sawah menjadi daerah permukiman dan industri karena peningkatan jumlah penduduk. Konversi lahan sawah mengakibatkan penyusutan dan degradasi lahan sawah. Sebagaimana yang diamanatkan dalam Undang-Undang No.26/2007 tentang Penataan Ruang, tujuan penataan ruang adalah untuk melindungi fungsi penggunaan ruang dan mencegah dampak lingkungan sebagai akibat dari implementasi penggunaan ruang. Tujuan penelitian ini adalah untuk mengkaji konsistensi kebijakan pemerintah sebagai implementasi Undang-Undang No. 26/2007 dalam menjaga keberlanjutan lahan sawah berdasarkan konsep agrokologi. Dengan menggunakan basismodel SIG, zona agroekologi yang diusulkan sebagai acuan untuk penetapan luasan baku lahan sawah disintesa dari basisdata sistem lahan, penutup lahan, status kawasan, agroklimat, kondisi irigasi, dan sosial-budaya yang diintegrasikan dalam layer batas wilayah administrasi. Hasil penelitian menunjukkan bahwa kebijakan pemerintah di sektor non-pertanian dalam pengalokasian status kawasan permukiman ternyata tidak secara penuh konsisten dengan Undang-Undang No.26/2007 dalam menjaga keberlanjutan lahan sawah produkif sebagai lumbung beras nasional. Potensi kerugian proudksi beras dari akibat implementasi kebijakan tersebut diperkirakan mencapai 3,5 juta ton per tahun.Kata Kunci: zona agroekologi lahan sawah, penataan ruang, basismodel SIG, konversi lahan.

RISIKO BANJIR PADA LAHAN SAWAH DI SEMARANG DAN SEKITARNYA

MAJALAH ILMIAH GLOBE Vol 17, No 1 (2015)
Publisher : Badan Informasi Geospasial

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Abstract

Lahan sawah di wilayah Semarang dan sekitarnya berada pada dataran rendah pesisir yang rawan banjir, baik yang disebabkan oleh curah hujan yang tinggi maupun rob. Analisis risiko banjir diperlukan karena banjir merupakan ancaman bagi lahan sawah. Banjir dapat menyebabkan berkurangnya produktivitas lahan sawah, bahkan lahan sawah akan rusak dan tidak dapat ditanami padi jika tergenang banjir secara permanen. Penelitian ini bertujuan untuk menganalisis risiko banjir genangan pada lahan sawah berdasarkan kondisi bahaya dan kerentanannya. Lingkup penelitian mencakup analisis bahaya, kerentanan, dan risiko banjir genangan pada lahan sawah. Data yang digunakan dalam penelitian ini terdiri dari peta Rupa Bumi Indonesia (RBI), peta Sistem Lahan, citra penginderaan jauh resolusi tinggi, data curah hujan, debit sungai, tinggi pasang air laut, data statistik Potensi Desa (PODES), data statistik pertanian dan laporan banjir. Analisis kerawanan banjir merupakan gabungan antara kerawanan banjir genangan yang disebabkan oleh hujan dan rob. Analisis kerentanan banjir menggunakan data statistik PODES 2008 dan laporan kejadian banjir. Hasil penelitian menunjukkan bahwa banjir genangan rob merupakan ancaman dan berisiko pada pengurangan lahan sawah di wilayah ini. Selama periode 1994 – 2009 lahan sawah telah berkurang seluas 8.508,50 ha. Sebagian lahan sawah yang tergenang rob secara permanen telah dialihfungsikan ke penggunaan lain.Kata kunci: banjir genangan, rob, sawah, risikoABSTRACTPaddy field in Semarang and its surrounding areas are situated in low-lying flood-prone coastal area, whether caused by heavy rainfall and high tide. Flood risk analysis is required because flooding in this area is considered as a threat to the paddy field. Floods can lead to reduction of the paddy fields‟ productivity, even damaging and cannot be planted with rice if flooded occurred permanently. This study aimed to analyze the risk of flood inundation in paddy fields based on hazard and vulnerability factors. The scope of the research includes analysis of hazards, vulnerabilities, and risks of flood inundation in the paddy fields. The data used in this study consisted of topographic and land systems maps, high-resolution satellite remote sensed imageries, rainfall data, river discharge, tides, and statistical data of Village Potential (PODES), statistical data of agriculture and flood reports data. The analysis of flood vulnerability is a combination of flood vulnerability caused by high rainfall and tides. The flood vulnerability analysis conducted by using PODES 2008 statistical data and flood incidencereports. The results showed that the tidal flood inundation is the main threat and provide risk on the reduction of the paddy fields in this area. During the period of 1994 – 2009, the paddy field has been reduced by 8,508.50 hectares. Some of the paddy fields that have been flooded permanently due to tides have been converted to other uses.Keywords: flood inundation, tidal flood, paddy field, risk

DINAMIKA PEMANFAATAN LAHAN BENTANG ALAM GUMUK PASIR PANTAI PARANGTRITIS, KABUPATEN BANTUL

GEOMATIKA Vol 16, No 2 (2010)
Publisher : Badan Informasi Geospasial in Partnership with MAPIN

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Abstract

The sand dunes’ range or landscape in Parangtritis beach are not instantly formed instead they are formed over a long period of time to form their distinct and unique physical shapes. On the other hand, the existence of sand dunes is threatened by a number of forces which are potentially damaging to their survival. This research is intended to analyzing land utilization in the area of sand dunes.Keywords: Landuse, landscape, sand dune, coastal.ABSTRAKHamparan atau bentang alam gumuk pasir di Pantai Parangtritis tidak terbentuk secara instan, tetapi dalam kurun waktu yang cukup lama membentuk kenampakan fisik yang menarik dan unik. Disisi lain, keberadaan gumuk pasir menghadapi berbagai tekanan yang berpotensi merusak kelestariannya. Penelitian ini bertujuan menganalisis pemanfaatan lahan di kawasan bentang alam gumuk pasir.Kata Kunci: Penggunaan Lahan, bentanglahan, gumuk pasir, pesisir

KAJIAN DETEKSI DEGRADASI HUTAN DENGAN DATA MODIS DAN LANDSAT DALAM MEMAHAMI SKENARIO PENERAPAN REDD

MAJALAH ILMIAH GLOBE Vol 13, No 2 (2011)
Publisher : Badan Informasi Geospasial

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Abstract

Dalam studi ini data multi temporal satelit Landsat resolusi spasial 30 meter periodetahun 2003, 2006 dan 2009 dan data MODIS tahun 2003 dan 2008 digunakan untuk deteksi degradasi hutan wilayah Kalimantan, khususnya Kalimantan Timur. Deteksi level degradasi hutan menggunakan metode deteksi perubahan (change detection) dan analisa fragmentasi (fragmentation analysis). Kategori fragmentasi ditentukan berdasar pengelompokkan hutan dengan klas edge, perforated dan patch, sementara hutan alami dikelompokkan atas dalam hutan core pada buffer 250 sampai 500 acre. Selanjutnya dilakukan analisa faktor dasar (baseline factor) untuk memahami penerapan REDD sebagai respon terjadinya degradasi hutan. Hasil analisa data MODIS 2003-2008 menunjukkan terjadinya kecenderungan perubahan penurunan luas hutan sebesar 23,5% (7.256.931 ha). Dari 23,5% tersebut, sekitar 70,0% (5.089.851,7 ha) berupa perubahan penurunan pada hutan alami dan sekitar30,0% (2.167.079,3 ha) berupa penambahan hutan yang terkategori degradasi. Sebaliknya terjadi pula penambahan pada areal bukan hutan sekitar 30% (2.167.079,3 ha). Sementara analisa dengan data Landsat menunjukkan hasil kebalikan, yaitu selama periode 2003 – 2009 terjadi kenaikan jumlah hutan alami sebesar 3,5% (961.313 ha). Dari jumlah 3,5% tersebut, sebesar 7,8% (1.519.694 ha) berupa penambahan pada luasan hutan alami, dan berupa penurunan hutan terkategori degradasi sebesar 6,8% (558.381 ha) dan penurunan atas area bukan hutan sebesar 3,7% (961.313 ha). Adaptasi REDD pada masyarakat Kalimantan timur tersebar pada kelompok hutan terdegradasi (Patch, Perforated dan Edge). Kata Kunci: Hutan Tropis Basah, MODIS, Landsat, REDD, Hutan TerdegradasiABSTRACTSThis study used multi-temporal satellite Landsat imageries with 30-meter spatialresolution period in 2003, 2006 and 2009 and MODIS data in 2003 and 2008 for detection of forest degradation in Kalimantan region, especially East Kalimantan. Detection of degradation level was done using change detection method and fragmentation analysis. Categories were determined by grouping of forest fragmentation by class of edge, perforated and patches, while natural forests in the forest cores were grouped on the buffer 250 to 500 acres. Further analysis was conducted on baseline factors to understand the application of REDD as a response to forest degradation. Analysis result of MODIS data in 2003-2008 shows a trend of decreased forest area by 23.5% (7,256,931 ha). Of 23.5%, approximately 70.0% (11,793,319 ha) were in the form of changes to a decrease in natural forest and approximately 30.0% (4,536,388 ha) of forests are categorized addition of degradation. In contrast, there were also addition to non-forest area of about 30% (7,252,525 ha). Meanwhile, Landsat data analysis shows the opposite result. For example, during the period 2003 – 2009 there was an increase of 3.5% (961,313 ha) of natural forests. Out of the total 3.5% of these, 7.8% (1,519,694 ha) were in the form of addition to the natural forest area, and a decrease in forest degradation as many as 6.8% (558,381 ha) and a decrease of nonforest area of 3.7% (961,313 ha). Adaptation of REDD in East Kalimantan communities scattered in groups of degraded forests (Patch, Perforated and Edge).Keywords: Tropical Rain Forest, MODIS, Landsat, REDD, Degraded Forest

SURVEI CEPAT TERINTEGRASI UNTUK PEMANTAUAN DAN PENGAMBILAN KEPUTUSAN MENGATASI BANJIR DI SUNGAI BEKASI

MAJALAH ILMIAH GLOBE Vol 15, No 1 (2013)
Publisher : Badan Informasi Geospasial

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Abstract

ABSTRAKPenelitian ini bertujuan untuk mengaplikasikan metode survei penginderaan jauh geografis secara cepat danterintegrasi untuk pemantauan dan pengambilan keputusan dalam mengatasi bencana banjir. Lokasi penelitiandifokuskan di sepanjang Sungai Bekasi sampai Sungai Cikeas sebagai bagian dari DAS Bekasi. Peta Rupabumi danpeta citra penginderaan jauh tegak multi resolusi digunakan sebagai informasi geospasial utama, dilengkapi dengansurvei lapangan meliputi susur sungai menggunakan perahu karet dan survei darat serta wawancara denganpenduduk di sekitar bantaran sungai. Hasil penelitian menunjukkan bahwa di sepanjang bantaran Sungai Bekasi diDAS Hilir dan Sungai Cikeas di DAS Tengah dan Hulu telah banyak digunakan untuk berbagai penggunaan lahan,yaitu permukiman, kawasan industri, pemakaman, lapangan golf, gedung perkantoran, rumah sakit, dan fasilitasumum lainnya. Dengan semakin berkurangnya lahan bervegetasi di wilayah DAS Hulu dan Tengah, memperbesaraliran permukaan, dan berakibat seringnya terjadi banjir di sepanjang sempadan sungai Bekasi Bagian Hilir.Kata Kunci: Penginderaan Jauh, Multi Resolusi, Banjir, Survei Cepat Terintegrasi, Pengambilan Keputusan.ABSTRACTThis research aims to apply a method of integrated geographic remote sensing rapid survey for flood disastermonitoring and decision making in order to find a solution in the case of flood occurence. The research sites had beenfocused along the Bekasi River to Cikeas River. Topographic maps and remote sensing imagery map at small andlarge scales were used as the primary geospatial information, and supplemented by field surveys along the river usingrubber boats, land cover/ land use surveys and interviews around the riverbanks. The results showed that the floodplains along rivers in the lower watershed of Bekasi and Cikeas in the middle and upper watershed has been widelyused for a variety of land uses, such as settlements, industrial areas, cemeteries, golf courses, office buildings, andother public facilities. The decreasing amount of vegetated land in the upper and middle watershed resulted inincreasing of run off and more frequent flooding along the river banks down stream of Bekasi River.Keywords: Remote Sensing, Multi Resolution, Flood, Rapid Integrated Survey, Decision Making.