scholarly journals DYNAMIC MORPHOLOGICAL CHANGES OF SPIT IN APRIL–MAY 2014 IN OPAK RIVER MOUTH, BANTUL, DAERAH ISTIMEWA YOGYAKARTA

2015 ◽  
Vol 6 (2) ◽  
Author(s):  
Yan Restu Freski ◽  
Agung Setianto ◽  
Srijono Srijono

As an oceanic coast, the beaches in the southern part of Java Island are predominantly influenced by ocean energy which is driven by periodical monsoon. This periodical process impacts the dynamic changes of spit in the river mouth system. Therefore, spit is a key to study the process in the southern coast of Java Island especially in Opak River Mouth. It needs a deep-root explanation about the morphological changes and the sedimentological mechanism. This research project was built by data such as spit geometry, aerial photographs and spontaneous wind direction. The supporting data included multitemporal IKONOS-Quickbird images from Google Earth and aerial photographs. These data were collected from field-work investigation and laboratorywork. The spit geometry was compiled by Global Positioning System handheld tracking along the edge of spit and crosschecked by aerial photograph using pole. The ultimate interpretation and periodic models were built by data reconstruction based on the geometry of spit and spontaneous wind direction. Spit changed weekly due to monsoon transition in April to May 2014. The morphological changes could be noted as the spit starting to be cut off by the highrate flow of Opak River. The process continued until the net drift moving westward. Keywords: April, coast, May, Opak river mouth, spit.

WARTA ARDHIA ◽  
2014 ◽  
Vol 40 (3) ◽  
pp. 147-162
Author(s):  
Yati Nurhayati ◽  
Susanti Susanti

Teknlologi ADSB is a new technology in the observation plane which is a combination of global positioning system (GPS), so that the aircraft can be traced to the position, velocity, wind direction, and altitude. This tool can be installed in the aircraft or ground stations and more superior than the radar.ADS-B is indeed a revolutionary look, start with only the antenna and the tool less than for a small refrigerator can detect aircraft and air traffic displays.Automatic Dependent Surveillance- Broadcast (ADS-B) is a detection technology where each plane passing owned transponder emits every two times per second information altitude, position, speed, direction, and other information to ground stations and other aircraft. This information is obtained from the information the Global Positioning System (GPS) or backup Flight Management System (FMS) in each plane. Teknlologi ADSB adalah teknologi baru dalam pengamatan pesawat terbang yang merupakan kombinasi global positioning system (GPS), sehingga pesawat bisa terlacak posisi, kecepatan, arah angin, dan ketinggian. Alat ini bisa dipasang di pesawat atau stasiun darat dan lebih unggul dari radar. ADS-B ini memang terlihat revolusioner, dengan hanya berbekal antenna dan alat kurang dari sebesar lemari es kecil dapat mendeteksi pesawat terbang dan menampilkan lalu lintas udara.Automatic Dependent Surveillance- Broadcast (ADS-B) adalah teknologi pendeteksi dimana setiap pesawat lewat transponder yang dimiliki memancarkan setiap dua kali dalam tiap detik informasi ketinggian, posisi, kecepatan, arah, dan informasi lainnya ke stasiun darat dan pesawat lainnya. Informasi ini didapat dari informasi Global Positioning System (GPS) atau backup Flight Management System (FMS) yang ada di pesawat masing-masing.


2014 ◽  
Vol 4 (1) ◽  
Author(s):  
H. Mehrabi ◽  
B. Voosoghi

AbstractPrecision, reliability and cost are the major criteria applied in optimization and design of geodetic networks. The terrestrial networks are being replaced quickly by permanent and campaign Global Positioning System (GPS) networks. These networks must be optimized using the same three criteria. In this article the optimization of the observational plan of local GPS networks (Second Order Design (SOD)) is considered using the precision criterion. This study is limited to the selection of optimal numbers and the best distribution of the non-trivial baselines throughout the network. This objective is accomplished based on the SOD solution through the analytical method in operational research by the means of quadratic programming algorithm. This presented method is tested on a real GPS network and appears to be a useful technique in terms of cost reduction in the field work by the provided observational plan and optimal distribution of the baselines throughout the network. Results indicate that weights of almost 36% of the baselines are negligiblewhen compared to the weights of the rest of the baselines; therefore, they could be eliminated fromthe observational plan, resulting in a 36% saving in the fieldwork cost.


2020 ◽  
Author(s):  
Omar F. Althuwaynee ◽  
In-Tak Hwang ◽  
Hyuck-jin Park ◽  
Swang-Wan Kim ◽  
Ali Aydda

<p>In 1998, intense rainfall events hit the Pohang state, south west of Korea, which results in highest number of landslides registered in this area (generally the area has a relatively short history of landslide inventorying). The current inventory was digitized using Aerial photographs (lack of photogeological stereoscopic analysis of the aerial images) and coupled with basic field verification (due to limit funding available). Leaving the applied susceptibility maps models performed, using this inventory, with high degree of uncertainty.  Currently a research initiative carried to audit the landslide inventory using freely available aerial photographs and the time tuning function in Google earth for aerial archives. We notice some slopes area covered with deformed forest types that is similar in texture to that seen in digitized locations of landslides inventory. Due to long retune period of similar rainfall event, and with an assumption that the available landslides inventory might not complete. A certain hypothesis of additional investigation including field work to audit the landslides incidents is highly needed. In the current research, we assumed that, some dormant slopes caused by the 1998 event can be reactivated with the current extreme (uncontrolled) uses of slopes by human activities (constructions of real estate’s projects). To that end, a methodology of three main stages were proposed.</p><p>Stage one; Dormant susceptibility map (DSM) coupled with landslide susceptibility map will be produced. Machine learning supervised classification of eXtreme Gradient Boosting algorithms and Ensemble Random Forest, that run on tree-based classification assumption considering only active and dormant landslides as well as stable ground. Stage two; field work needs to be designed by geological and geotechnical experts to collect the doubtful locations by guidance of DSM and consider the new locations as dormant inventory. However, the areas of low dormant susceptibility (or mutual zones with Landslide susceptibility) will be recommended for advanced filed work and soil sampling test to complete the landslides identification of such highly urbanized area. Stage three; knowing the contour depths of diluvial and alluvial deposits can be useful for extracting areas that are more prone to landslides. Especially in the case of a rigid bedrock beneath the diluvial crust. Therefore, reconstructing the Quaternary formation thickness using boreholes repository and then represent the entire study area using CoKriging surface interpolation technique with elevation model. The current research results will provide us a better understanding of landcover stability conditions and their spatial prediction features.</p><div> <div> </div> <div>[email protected]</div> <div>[email protected]</div> </div>


HortScience ◽  
2013 ◽  
Vol 48 (2) ◽  
pp. 158-163
Author(s):  
Justin A. Porter ◽  
David Berle ◽  
Hazel Y. Wetzstein

Accurate mapping, inventory assessment, and habitat descriptions are critically important for the development of plant conservation strategies of rare plants. Georgia plume, Elliottia racemosa (Ericaceae), is a rare threatened plant endemic only to the state of Georgia. In this study, census and distribution data were collected and the ecological habitat characterized for all known populations of georgia plume using geographic information system/global positioning system (GIS/GPS)-based methods. Causes for population losses and decline were assessed by evaluating both extant populations and historically reported but currently inactive sites. Landowner permission was obtained to visit 56% (32 of 57) of all known recorded populations. Over 40% of visited locations no longer contained georgia plume; 58% of inactive sites were associated with anthropogenic disturbances including farming and timber. Populations not visited by ground were evaluated using aerial photographs: of 29 putative populations, 66% were judged highly unlikely to contain georgia plume based on current land use. Census data verified that many populations have few individuals: 75% contained less than 45 individuals; over one-third contained 12 or fewer individuals. Over 80% of extant populations had an area of less than 0.3 ha. Field and aerial assessments of recent and historically noted populations confirm that georgia plume has disappeared from many previously reported locations and that fewer than two dozen populations may remain.


Author(s):  
Frederico Uelinton Basso Cotrim ◽  
Marco Aurélio Arantes ◽  
Silvia Sidnéia Da Silva ◽  
Edilson Carlos Caritá

Atualmente, no Brasil, a dengue é uma das maiores preocupações em relação às doenças infecciosas, se constituindo em um problema de saúde pública. Trata-se de uma virose transmitida pelo Aedes aegypti, mosquito transmissor, que pica apenas durante o dia. A utilização de Sistemas de Informações Geográficas pode ajudar na análise e no planejamento do combate à dengue, pois estão presentes na vida das pessoas, disponibilizam informações geoespaciais, e por meio de Sistema de Posicionamento Global (Global Positioning System – GPS) integram mapas digitais, permitindo diversas aplicações, como por exemplo, dispositivos portáteis de navegação e até mesmo o Google Earth. O objetivo deste estudo é apresentar o uso de um Sistema de Informação Geográfica (SIG) na análise da evolução da distribuição espacial dos casos de dengue nas grandes regiões e unidades federativas do Brasil. Para atingir o objetivo foi desenvolvido um software SIG utilizando o Sistema de Gerenciamento de Banco de Dados (SGBD) PostgreSQL 9.5 e sua extensão espacial PostGIS 2.2, o Framework .NET 4.5, a linguagem C# e a biblioteca SharpMap 1.1. Para a base de dados do software foram utilizados dados geográficos disponibilizados pelo Instituto Brasileiro de Geografia e Estatística e da empresa privada Gismaps Sistemas. As informações estatísticas referentes à ocorrência dos casos de dengue do período de 1990 a 2014 foram obtidas do Portal da Saúde do Governo Federal. A partir dos resultados apresentados no software foi possível analisar a posição e o percentual de crescimento dos casos de dengue, ao longo dos anos, nas grandes regiões e unidades federativas. O SIG demonstrou ser uma ferramenta valiosa no auxílio ao estudo dos casos de dengue, possibilitando um fácil entendimento de sua distribuição espacial.


2019 ◽  
Vol 7 (8) ◽  
pp. 248 ◽  
Author(s):  
Mustapha El Jakani ◽  
Said Ettazarini ◽  
Hassan Rhinane ◽  
Mohammed Raji ◽  
Mohamed Radid ◽  
...  

The Oum Er-Rbia estuary is located on the Atlantic littoral of Morocco. It undergoes severe clogging due to the sand deposition in its outlet. The current study examined the indicators of the morphodynamic evolution in the littoral system including the Oum Er-Rbia estuary and the neighboring beaches over 1970–2017. The methodology adopted was based on the analysis and the interpretation of aerial photographs and Google Earth images under a GIS environment and field work. The morphodynamic evolution was discussed by taking into account the evolution of hydraulic facilities installed in the watershed area, especially the construction of dams, as well as the dredging works in the Oum Er-Rbia estuary. The results highlight the morphologic evolution estimated in terms of surface units observed in the estuary and the neighboring beaches. The evolution of the littoral system was mainly influenced by the closest dam location and by the dredging works, in addition to the regulation of the river flow by the installation of hydraulic facilities upstream.


2020 ◽  
Vol 13 (1) ◽  
pp. 120
Author(s):  
Massimo Conforti ◽  
Michele Mercuri ◽  
Luigi Borrelli

In mountainous landscapes, where strongly deformed pelitic sediments outcrop, earthflows can dominate denudation processes and landscape evolution. This paper investigated geological and geomorphological features and space-time evolution over a 65-year time span (1954–2019) of a large earthflow, representative of wide sectors of the Apennine chain of southern Italy. The landslide, with a maximum length of 1.85 × 103 m, affects an area of 4.21 × 105 m2 and exhibits two source zones: a narrow and elongated transport zone and a lobate accumulation zone. Spatial and temporal morphological changes of the earthflow were assessed, comparing multi-source and multi-temporal data (aerial photographs, Google Earth satellite images, Light Detection and Ranging (LiDAR) and Unmanned Aerial Vehicles (UAV) system data). Geomorphic changes, quantified using Digital Terrain Models (DTMs) of differences, highlighted an extensive lowering of the topographic surface in the source area and a significant uplift at the landslide toe. Moreover, the multi-temporal analysis showed a high increase of landslide surface (more than 66%) during the last 65 years. The volumetric analyses showed that different sectors of the earthflow were active at different times, with different rates of topographic change. Overall, the used approach highlighted the great potentiality of the integration of multi-source and multi-temporal data for the diachronic reconstruction of morphological landslide evolution.


Respati ◽  
2018 ◽  
Vol 13 (3) ◽  
Author(s):  
Andhy Sulistyo ◽  
Anton Yudhana ◽  
Sunardi Sunardi ◽  
Resmi Aini

INTISARINyamuk  Aedes  Aegypti menularkan penyakit DBD (Demam Berdarah Dengue) ke manusia dengan gigitannya. Breeding Place  merupakan berkembangbiaknya  jentik nyamuk di tempat penampungan air yang tidak beralaskan tanah  kurang  menjadi pantauan oleh masyarakat. GPS (Global Positioning System) adalah sistem satelit navigasi dan pemantauan posisi koordiinat bumi. Proses pengambilan lokasi Breeding Place tersebut akan diperoleh koordinat yang disebut waypoint (garis lintang dan bujur pada peta). Google Maps dan GoogleEarth saat ini telah tersedia untuk Android dan menawarkan keseluruhan layanan yang dimiliki Google. Salah satu fitur yang bermanfaat bagi banyak orang adalah informasi titik koordinat  GPS lintang dan bujurnya.Google Maps dirancang untuk memenuhi kebutuhan dari penggunanya. Seperti mencari bisnis lokal, melihat peta, mendapatkan petunjuk, informasi lalu lintas real-time, melihat jadwal keberangkatan masih banyak lagi.Sementara Google Earth dapat membawa  pada  virtual tempat-tempat indah yang berbeda di belahan bumi. Google Earth dapat diasumsikan sebagai bagian dari Google Maps. Tapi, lebih mengutamakan pengalaman daripada utilitas.Penelitian ini bertujuan membandingkan tingkat akurasi antara Gooogle Maps dan Google Earth dengan metoda linier jarak(phytagoras) untuk mengetahui titik koordinat Breeding Place di lingkungan penduduk. Hasil uji linier jarak data diolah menggunakan  standar deviasi untuk mengindikasikan ketelitian atau kedekatan setiap individual data terhadap data lainnya, pada suatu pengamatan terhadap objek tertentu. Dengan semakin besarnya nilai standar deviasi, maka tingkat ketelitian data hasil pengukuran dapat dikatakan burukKata kunci —GPS,Breeding Place,Gooogle Maps,Google Earth. ABSTRACTAedes Aegypti mosquitoes transmit DHF (Dengue Hemorrhagic Fever) to humans with bites. Breeding Place is the breeding of mosquito larvae in water shelters that are not grounded and are not monitored by the community. GPS (Global Positioning System) is a navigation satellite system and monitoring the Earth's coordinating position. The process of taking the location of the Breeding Place will be obtained by the coordinates called waypoint (latitude and longitude on the map). Google Maps and Google Earth are now available for Android and offer all of Google's services. One feature that is useful for many people is information on the latitude and longitude GPS coordinates. Google Maps is designed to meet the needs of its users. Like looking for a local business, looking at maps, getting instructions, real-time traffic information, see more departure schedules. While Google Earth can bring to virtual different beautiful places in the hemisphere. Google Earth can be assumed as part of Google Maps. But, prioritizing experience rather than utility.This study aims to compare the level of accuracy between Gooogle Maps and Google Earth with the linear distance method(phytagoras) to find out the coordinates of Breeding Place in a population environment. The linear test distance of the data is processed using standard deviations to indicate the accuracy or proximity of each individual data to other data, in an observation of a particular object. With the increasing standard deviation value, the level of accuracy of the measurement data can be said to be badKeywords— GPS,Breeding Place,Gooogle Maps,Google Earth.INTISARINyamuk  Aedes  Aegypti menularkan penyakit DBD (Demam Berdarah Dengue) ke manusia dengan gigitannya. Breeding Place  merupakan berkembangbiaknya  jentik nyamuk di tempat penampungan air yang tidak beralaskan tanah  kurang  menjadi pantauan oleh masyarakat. GPS (Global Positioning System) adalah sistem satelit navigasi dan pemantauan posisi koordiinat bumi. Proses pengambilan lokasi Breeding Place tersebut akan diperoleh koordinat yang disebut waypoint (garis lintang dan bujur pada peta). Google Maps dan GoogleEarth saat ini telah tersedia untuk Android dan menawarkan keseluruhan layanan yang dimiliki Google. Salah satu fitur yang bermanfaat bagi banyak orang adalah informasi titik koordinat  GPS lintang dan bujurnya.Google Maps dirancang untuk memenuhi kebutuhan dari penggunanya. Seperti mencari bisnis lokal, melihat peta, mendapatkan petunjuk, informasi lalu lintas real-time, melihat jadwal keberangkatan masih banyak lagi.Sementara Google Earth dapat membawa  pada  virtual tempat-tempat indah yang berbeda di belahan bumi. Google Earth dapat diasumsikan sebagai bagian dari Google Maps. Tapi, lebih mengutamakan pengalaman daripada utilitas.Penelitian ini bertujuan membandingkan tingkat akurasi antara Gooogle Maps dan Google Earth dengan metoda linier jarak(phytagoras) untuk mengetahui titik koordinat Breeding Place di lingkungan penduduk. Hasil uji linier jarak data diolah menggunakan  standar deviasi untuk mengindikasikan ketelitian atau kedekatan setiap individual data terhadap data lainnya, pada suatu pengamatan terhadap objek tertentu. Dengan semakin besarnya nilai standar deviasi, maka tingkat ketelitian data hasil pengukuran dapat dikatakan burukKata kunci —GPS,Breeding Place,Gooogle Maps,Google Earth. ABSTRACTAedes Aegypti mosquitoes transmit DHF (Dengue Hemorrhagic Fever) to humans with bites. Breeding Place is the breeding of mosquito larvae in water shelters that are not grounded and are not monitored by the community. GPS (Global Positioning System) is a navigation satellite system and monitoring the Earth's coordinating position. The process of taking the location of the Breeding Place will be obtained by the coordinates called waypoint (latitude and longitude on the map). Google Maps and Google Earth are now available for Android and offer all of Google's services. One feature that is useful for many people is information on the latitude and longitude GPS coordinates. Google Maps is designed to meet the needs of its users. Like looking for a local business, looking at maps, getting instructions, real-time traffic information, see more departure schedules. While Google Earth can bring to virtual different beautiful places in the hemisphere. Google Earth can be assumed as part of Google Maps. But, prioritizing experience rather than utility.This study aims to compare the level of accuracy between Gooogle Maps and Google Earth with the linear distance method(phytagoras) to find out the coordinates of Breeding Place in a population environment. The linear test distance of the data is processed using standard deviations to indicate the accuracy or proximity of each individual data to other data, in an observation of a particular object. With the increasing standard deviation value, the level of accuracy of the measurement data can be said to be badKeywords— GPS,Breeding Place,Gooogle Maps,Google Earth.


2018 ◽  
Vol 130 (1) ◽  
pp. 18
Author(s):  
George Hook

The colonial artist Eugene von Guérard travelled extensively throughout south-eastern Australia sketching thousands of views during his three-decade-long sojourn in Australia. His field drawings are renowned for their fidelity to nature and observational accuracy, but the validity of the latter claim depends on comparing drawings with the view at the sites where he sketched. The location of the view in some artworks, such as Mount Kosciusko, seen from the Victorian Border, has eluded art historians and aficionados who have ventured into the field. This article discusses the collation of clues from historical narratives, maps and surveying techniques to limit the search area for the vantage point where he sketched the view on which he based his painting of the Kosciuszko massif. Novel use of spatial technology utilising satellite imagery, Global Positioning System (GPS) and Shuttle Radar Topography Mission (SRTM) data, particularly digital elevation models, to locate the actual site is explored, and the topographical accuracy of his sketches evaluated when compared with photographs taken from close to the site. Finally, the potential value of using spatial technology in art history field work is discussed.


Al-Ahkam ◽  
2016 ◽  
Vol 26 (1) ◽  
pp. 65
Author(s):  
Anisah Budiwati

<p>There are at least three ways to determine the position or the coordinates of a spot on the Earth's surface. They are: istiwa' sticks, Global Positioning System (GPS), and Google Earth. Istiwa' stick is used without technology operations, while GPS and Google Earth are used with technology. Until now, the use of GPS and Google Earth is still a passively consumptive, without their critical analytical effort. This qualitative research using descriptive analytic mathematical methods. The objective of this study is the to know the theory, applications, and accuracy of the istiwa' stick, GPS, and Google Earth comparatively. The study found that the istiwa' stick is one of the alternatives way to determine the coordinates of the Earth which uses the theory of spherical trigonometry calculations simply without assistance. Whereas GPS and Google Earth use principles of geodetic scientifically. In terms of applications, the most practical and accurate is GPS,<br />and then followed by Google Earth, and the last is istiwa' stick.</p><p><strong><br /></strong></p><p><strong></strong>Setidaknya ada tiga cara untuk menentukan posisi atau titik koordinat suatu tempat di permukaan Bumi, yaitu tongkat istiwa’, Global Positioning System (GPS), dan Google Earth. Tongkat istiwa’ digunakan tanpa bantuan teknologi, sedangkan GPS dan Google Earth digunakan dengan teknologi. Sampai saat ini, penggunaan GPS maupun Google Earth masih bersifat konsumtif pasif, tanpa adanya upaya analitis kritis. Penelitian<br />kualitatif ini menggunakan metode deskriptif analitik matematis. Penelitian ini memiliki tujuan untuk mengetahui teori, aplikasi, maupun akurasi tongkat istiwa’, GPS, dan Google<br />Earth secara komparatif. Penelitian ini menemukan bahwa tongkat istiwa’ adalah salah satu alternatif penentuan titik koordinat Bumi yang menggunakan teori perhitungan<br />spherical trigonometry secara sederhana tanpa bantuan, sedangkan GPS dan Google Earth menggunakan prinsip keilmuan geodesi yang lebih teliti. Dari segi aplikasi, yang<br />paling praktis dan akurat adalah GPS. Kemudian disusul Google Earth, dan tongkat istiwa’.</p>


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