Geoid (E-Journal)
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VALIDASI ALGORITMA ESTIMASI KONSENTRASI CHL-A DENGAN MENGGUNAKAN CITRA SATELIT LANDSAT 8(Studi Kasus : Laut Selatan Pulau Lombok, NTB)
No full textLombok southern sea has a high marine productivity which signifies fertility of a body water. Chl-a is one of the factors associated with fertility in the Lombok southern sea. Remote sensing can be used for mapping the distribution of Chl-a more efficient and accurate to extract the physical parameters of the water. Physical parameters accuracy is derived from remote sensing data depending on atmospheric correction algorithms and algorithms model to calculate the concentration of Chl-a.In this study, Landsat 8 was used to validate the existing estimation concentration algorithm of Chl-a by in-situ data collected in Lombok southern sea. Atmospheric corrected reflectance by 6SV and Flaash, as well as surface reflectance product from USGS were used as input of that algorithm. The algorithm with 6SV-reflectance produced highest accuracy with NMAE of 26.095%.Instead of using existing algorithm, a new algorithm following local characteristics of Lombok southern sea was developed. The developed algorithm based on log Rrs( 4) and log (Rrs ( 5)) produced high correlation (R2 = 0.551). Chl-a concentration estimation from Landsat 8 data, through atmospheric correction of 6SV produced NMAEof 13.484%
ANALISIS KOMPONEN HARMONIK PENGAMATAN PASANG SURUT MENGGUNAKAN ALAT PENGAMAT PASANG SURUT BERBASIS SENSOR ULTRASONIK (Studi Kasus: Desa Ujung Alang, Kampung Laut, Cilacap)
No full textTide observations done using two method, simple ways and automatics ways using sensors [4]. Currently in Indonesia there is agency that provider tidal observations data automatically, the Geospatial Information Agency which has 128 observation stations (Geospatial Information Agency, 2016). But the observation stations are only located in major ports and several beaches in Indonesia. While 2/3 of Indonesia is waters that would require mapping bathymetry and tide observations when it will construction, so required for alternative instrumens of automated tidal observers that more flexible and inexpensive. This study aims to determine the analysis of the harmonic components generated by the automatic tide observations using ultrasonic sensors.Tide observations made during the 15 days. The locations were situated in the waters of Ujung Alang, which is part of Segara Anakan river located in Cilacap, Central Java.The Observations data are used to define mean sea level and 9 harmonic components (K1, O1, P1, M2, S2, N2, K2, M4 and MS4). The calculation of Fomzahl value produce type of tides in mix semidiulnal with F= 0,557
PENENTUAN BATAS PENGELOLAAN WILAYAH LAUT DAERAH ANTARA PROVINSI JAWA TIMUR DAN PROVINSI BALI BERDASARKAN UNDANG-UNDANG REPUBLIK INDONESIA NOMOR 23 TAHUN 2014
No full textUndang-Undang Republik Indonesia Nomor 23 Tahun 2014 Tentang Pemerintahan Daerah merupakan pembaharuan dari undang-undang sebelumnya yaitu Undang-Undang Nomor 32 Tahun 2004 dikarenakan beberapa hal yang sudah tidak sesuai lagi dengan perkembangan keadaan pada saat ini. Beberapa perubahan dalam hal penentuan batas wilayah pengelolaan laut daerah yang terkandung dalam Undang-Undang Nomor 23 Tahun 2014 dari undang-undang sebelumnya yaitu mengenai penentuan garis pantai, batas wilayah bagi hasil kabupaten/kota, serta kewenangan setiap daerah baik provinsi maupun kabupaten/kota.Penelitian ini merupakan bentuk pengaplikasian Undang-Undang Nomor 23 Tahun 2014 dalam memperbaharui penentuan batas wilayah pengelolaan laut daerah. Metode yang digunakan untuk menentukan batas wilayah pengelolaan laut daerah dalam penelitian ini adalah metode kartometrik dengan menggunakan data Citra Satelit SPOT 7 dan Peta Lingkungan Pantai Indonesia (LPI). Objek penelitian ini adalah wilayah perbatasan antara Provinsi Jawa Timur dan Provinsi Bali yang diwakili oleh Kabupaten Banyuwangi (Jawa Timur) dan Kabupaten Buleleng sampai Kabupaten Jembrana (Bali). Dari penelitian ini dihasilkan median line sepanjang 40,3 km yang dibentuk oleh 41 titik, serta diperoleh luas wilayah pengelolaan laut Provinsi Jawa Timur sebesar 23.336,81 Ha dan Provinsi Bali sebesar 23.376,94 Ha serta batas wilayah bagi hasil kelautan untuk kabupaten/kota. Dihasilkan juga peta batas pengelolaan wilayah laut daerah sesuai lokasi penelitian ini
Analisa Hubungan Perubahan Muka Air Laut, Perubahan Volume Es Di Kutub Selatan Dan Curah Hujan Dengan Menggunakan Satelit Altimetri(Studi Kasus : Laut Selatan Pulau Jawa Tahun 2011 - 2014)
No full textOne of the impacts of climate change is sea level change. It is the result of the world's major thawing of coating ice, the North Pole and South Pole. Besidesfrom the effects of change ofice volume , sea level changes greatly influenced by the phenomenon of rain interpreted by rainfall.The effects of sea level change significantly also felt by residents of Indonesia which are predominantly located on the coast.Changes in sea level can be observed by using satellite Altimetry . One of them is the Jason-2 satellites mission. The change ofice volume can also be observed by satellite Altimetry that is through Cryosatmission.While the rainfall measurement, observed by satellite Tropical Rainfall Measuring Mission (TRMM).In this study, the monitoring of sea level change is carried out on the South Java sea in a period of 4 years (2011-2014) by taking three points of observation, namely Bodies Cilacap, Sadeng and Prigi. On the other hand, the monitoring of ice volume is carried out on the Antarctic at the same time. The result of data processing shows the trend of sea level changes in the southern Java with the value of -3,2 mm / year. In contrast, the trend of ice volume change in the South Pole has a value of 206.069 m3/year. The correlation between the value of sea level change s and ice volume change in the South Pole gives the correlation value of 0,044,the correlation values showed aweakThe correlation between the value of sea level changes and changes in rainfall gives the correlation value of of 0.716 (Cilacap), 0.720 (Sadeng), 0.773 (Prigi), the correlation values showed a strong correlation
ANALISISPEMODELAN TIGA DIMENSI ELEVASI PERMUKAAN DAN PERUBAHAN VOLUME LUMPUR MENGGUNAKAN CITRA SATELIT WORLDVIEW-2 UNTUK MONITORING BENCANA LUMPUR SIDOARJO
No full textSejak awal terjadinya bencana lumpur Sidoarjo pada 29 Mei 2006 silam, telah terjadi lebih dari 10 kali jebolan tanggul penahan lumpur. Yang terakhir terjadi pada akhir tahun 2014 lalu, mengakibatkan rumah warga yang berada di Desa Gempolsari, Kecamatan Tanggulangin, terendam lumpur. Untuk mencegah hal yang sama terulang kembali, maka perlu dilakukan monitoring untuk mengetahui pola persebaran lumpur dan elevasinya yang berada di dalam tanggul penahan. Dengan menggunakan citra satelit resolusi tinggi WorldView-2 bulan Agustus 2014 dan Juli 2015, maka tutupan lumpur dapat diklasifikasikan menjadi 4 kelas berbeda, yaitu Air Berlumpur, Lumpur Basah, Lumpur Mulai Mengering, dan Lumpur Kering.Menurut hasil pengolahan data observasi lapangan menggunakan GPS geodetik metode kinematik, diketahui bahwa volume total lumpur di dalam tanggul utama pada bulan Maret 2014 adalah 44.039.123,365 m3, dan bulan Juli 2015 sebesar 47.646.879,058 m3. Berdasarkan hasil pemodelan 3 dimensi permukaan lumpur, aliran lumpur pada bulan Maret 2014 cenderung mengarah ke utara. Sedangkan pada bulan Juli 2015 aliran lumpur lebih terkonsentrasi di dekat pusat semburan, membuat tanah bagian bawah mengalami sledding dan penurunan. Dengan demikian, permukaan lumpur menjadi terlihat seperti kaldera atau fitur kawah gunung lumpur. Dan sampai dengan bulan Juli 2015, tutupan lumpur didominasi oleh klasifikasi Lumpur Kering
ANALISIS KUALITAS AIR LAUT UNTUK PENENTUAN LOKASI BUDIDAYA KERAPU BEBEK MENGGUNAKAN CITRA SATELIT LANDSAT-8 (Studi Kasus : Teluk Lampung, Lampung)
No full textCromileptes Altivelis is one kind of exported fish commodities which are common in some areas of Indonesia. It cultured using Keramba Jaring Apung (KJA). Lampung Bay is one of the waters area that have potential as a location for the cultivation of those fishs. Determination of location for Cromileptes Altivelis aquaculture activities has strongly influenced by the quality of water because it affects the metabolism of fish growth. Described in the Standar Nasional Indonesia (SNI) 6487.4:2011 on Enlargement Production Cromileptes Altivelis in Keramba Jaring Apung (KJA) where the salinity, sea surface temperature, and pH are the important parameters that can affect the quality of sea water. In this research, the method that used to determine the location of CromileptesAltivelis aquaculture was remote sensing using Landsat-8 satellite imagery. This was because the Landsat-8 could work at visible wave (visible spectrum) where there are channels that can be used to extract quality parameters of ocean water. In determining the concentration of sea water quality parameters, this research used Son, et al algorithm and Syariz, et al algorithm to determine the value of salinity and sea surface temperature.Condition of water quality parameters in the Bay of Lampung was quite in accordance with the limit values listed in SNI 6487.4:2011 to be location of CromileptesAltivelis. Dominance value of sea surface temperature distribution was 26.05-30.05 C, dominance value of salinity distribution was 31.40-39.25 psu, and dominance value of pH distribution was 7.00–13.99. Based on the analysis of sea water quality parameters in Lampung Bay, territorial waters obtained 85.171,76 ha area corresponding to the location of Cromileptes Altivelis aquaculture
APLIKASI SISTEM INFORMASI GEOGRAFIS UNTUK INVENTARISASI DAN EVALUASI ASET BANGUNAN MILIK PEMERINTAH KOTA SURABAYA (STUDI KASUS : SURABAYA PUSAT)
No full textSurabaya is the capital city of East Java Province and the second largest population in Indonesia after DKI Jakarta in which has 2.947.816 populations.The Increase of the building assets belonging to the Surabaya Government is not consistent with the good asset management by the government. Thus, this condition causes some of the government assets are change over towards the private parties due to such legal problems, for example the absence of building certificate. Therefore, inventoryand evaluating towards the building assets of Surabaya Government are necessary to be conducted.This research took place in Central Surabaya including Genteng District, Tegalsari District, Bubutan District and Simokerto District. Hence, this research aims to mapping the assets of Surabaya Government to establish the Geographic Information System (GIS), and also to evaluate the legal aspects of Surabaya Government buildings assets. This research use data from the Departemen of Building and Land Management, Departement of Education dan Departemen of Healthand also any other data obtained during the research.By using GIS, the evaluation of the legal aspects found that the buildings assets owned by Surabaya Government in Central Surabaya in which do not have a certificate is about 70,22% and only 29,78% of building assets in which already have the certifiact
PEMODELAN ALIRAN MATERIAL SEDIMEN AKIBAT ARUS PASANG SURUT UNTUK PEMELIHARAAN KEDALAMAN PERAIRAN PELABUHAN (Studi Kasus :Pelabuhan Tanjung Perak-Teluk Lamong, Surabaya)
No full textTides is a phenomenon rise and fall of the sea water periodically due to moon and sun gravity. Tides able to raise ocean current is called a tidal current. A tidal current influence the transport of sediment contained in the waters. The process of the deposition of sediment in the waters can affected the shape of topography at the base of waters, one of them is called silting up. The silting up of the sea waters can cause problems if there is in port waters, especially in the ways of shipping and port ponds. The depth of the sea no longer in accordance with the draft of the boats can cause a ship crash. Hence, it needs maintenance the depth of port waters territory by port authority.In this research, done modelling the flow of sediment material due to a tidal current to know the location where happened the largest depth changing in order maintenance the depth in port waters. Modelling the stream and the flow of sediment done in a numerical simulation on tides and grain size parameter. Based on the result of modelling, the largest sediment material flow happened in the estuary of Kali Semampir at coordinate (693905,38; 9204010,30) when the tides is high, with solid flux value 0,000584 m³/s. While the greatest of depth waters change in port ponds Zamrud with the change equals 0,9 m, so that it needs waters depth monitoring in this area routinel
ANALISA PERBANDINGAN NILAI TANAH DENGAN NJOP UNTUK MENINGKATKAN POTENSI PAD (PENDAPATAN ASLI DAERAH) KHUSUSNYA PBB DAN BPHTB(Studi Kasus : Area Terdampak Akses Jembatan Suramadu Sisi Madura)
No full textDalam pengelolaan Pajak Bumi dan Bangunan Perkotaan dan Pedesaan (PBB P2), selain penetapan tarif pajak, Pemerintah Daerah juga mempunyai kewenangan untuk menetapkan besarnya Nilai Jual Objek Pajak NJOP tanah per m2,dipakai sebagai dasar untuk menghitung NJOP tanah masing-masing bidang tanah. Penetapan NJOP dilakukan dengan metode perbandingan data pasar (market data approach).
Dalam penelitian ini berdasarkan nilai tanah dengan penilaian massal dengan pendekatan data harga pasar yang menggunakan metode massal dan dibandingkan dengan nilai tanah berdasarkan NJOP. Data harga tanah yang dihitung adalah data harga pasar tanah dengan nilai bangunan yang sudah dikeluarkan dan disesuaikan juga dengankarakteristik kondisi sosial ekonomi daerah.
Hasil Penelitian menunjukkan bahwa perbandingan yang sangat signifikan adalah besarnya penerimaan dari data Nilai Jual Objek Pajak (NJOP) untuk PBB sebesar Rp1,488,000,000 dan BPHTB sebesar Rp2,344,000,000. Sedangkan dari data harga pasar untuk PBB Rp5,465,000,000 dan BPHTB Rp 13,842,000,000. Dan besarnya kenaikan untuk PBB adalah 367% dan BPHTB 590%
Kata Kunci :Penilaian Massal, Metode Penilaian Tanah, PBB (Pajak Bumi dan Bangunan),BPHTB (Bea Perolehan Hak Atas Tanah dan Bangunan)
ANALISA KETELITIAN DAN KESESUAIAN PEMODELAN 3D DENGAN PENDEKATAN GEOMETRI DAN TEKNIK STRUCTURE FROM MOTION (SFM) PADA OBYEK BANGUNAN
No full text3D modeling has become an activity that required by other field, such as for research, visualization, inventory, maintenance, and mapping. Buildings are target object of 3D modeling, one of them is Laboratorium Rekayasa Forensik ITS building as public facility. Photogrammetry as an art, a science and technology focusedon image processingis one of basic of3D modeling, especially Close Range Photogrammetry. Modeling of existing objects can be formed from photos with several methods. 3D Modeling methods that have been developed are Geometry-approach and SFM techniques.
Modeling result using Geometry-approach and SFM techniques will be qualified as good if the 3D model has accuracy level 3 (LoD 3). The object research tested are accuracy and suitability of model result to real object. Accuracy is tested by comparing ICP value of observation against ICP value of georeferenced model.The visual aspect is tested by view teh similarity of structure and texture result. While modeling suitability tested using some aspect, that is visually, detail geometry, processing duration, specification, cost, format, data, observation, performance, and file size.
From this research generate 3D model of Laboratorium Rekayasa Forensik ITS building that qualified LoD 3, with RMSE value (Easting, Northing, Height) < 50 cm and suitable architecture to real object for both methods, Geometry-approach and SFM technique. Modeling 3D using both methods has each characteristic in detail aspet, duration aspect, specification aspect, cost aspect, data aspect, observation aspect, performance aspect, and file size aspect