scholarly journals Using spatial technology to locate the view illustrated in Eugene von Guérard’s painting of the Kosciuszko massif

2018 ◽  
Vol 130 (1) ◽  
pp. 18
Author(s):  
George Hook
Keyword(s):  
Global Positioning System ◽  
Art History ◽  
Field Work ◽  
Shuttle Radar Topography Mission ◽  
Historical Narratives ◽  
Observational Accuracy ◽  
Digital Elevation ◽  
Eastern Australia ◽  
Global Positioning ◽  
Spatial Technology

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.

scholarly journals Optimal observational planning of local GPS networks: assessing an analytical method

2014 ◽  
Vol 4 (1) ◽  
Author(s):  
H. Mehrabi ◽  
B. Voosoghi
Keyword(s):  
Global Positioning System ◽  
Analytical Method ◽  
Cost Reduction ◽  
Operational Research ◽  
Field Work ◽  
Programming Algorithm ◽  
Positioning System ◽  
Global Positioning ◽  
Gps Networks ◽  
Selection Of

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.

Evaluation of Low Cost Digital Cameras for Producing Photogrammetric Output from UAV

2018 ◽  
Vol 7 (2.29) ◽  
pp. 792 ◽  
Author(s):  
Syafiq Sukor ◽  
Anuar Ahmad
Keyword(s):  
Global Positioning System ◽  
Mean Squared Error ◽  
Low Cost ◽  
Control Point ◽  
Ground Control ◽  
Digital Cameras ◽  
Squared Error ◽  
Digital Elevation ◽  
Global Positioning ◽  
Elevation Model

Recently there a lot of improvement in digital photogrammetry and this allow photogrammetry to become faster and cheaper . This study discuss about two type of low cost camera which is the compact camera (Canon Power Shot SX230 ) and action camera (Xiaomi yi) where both of them have different lens distortion. This study is conducted within UTM (Universiti Teknologi Malaysia) Skudai campus at Kolej  Tun Razak. Both of the Canon Power Shot SX230 and Xiaomi yi camera would be attach to the UAV  to take aerial photo with three different altitude which is 60 meter, 80 meter and 100 meter with a similar flight path. Check point (CPs) and Ground control point (GCPs) were also established using rapid static technique of Global Positioning System (GPS) and Total Station. The Canon Power Shot SX230 and Xiaomi yi camera is then calibrated using checkboard calibration this is done by using Agisoft  Lens software. Then all of the pictures that been taken by the Canon Power Shot SX230 and the Xiaomi yi would be processed by using Agisoft Photoscan software to generate Digital Elevation Model (DEM), orthophoto and contour line. The accuracy of DEM was determined based on Root Mean Squared Error (RMSE) value. Both of the result is then analyze visually and statically. Overall both of the camera gives a slight different in accuracy. 

scholarly journals Vertical Accuracy of Digital Elevation Models Based on Differential Global Positioning System

2021 ◽  
pp. 91-99
Author(s):  
Aqeel A. Abdulhassan ◽  
Ahmed A. Naji ◽  
Haqi H. Abbood
Keyword(s):  
Global Positioning System ◽  
Thermal Emission ◽  
Quantitative Description ◽  
Positioning System ◽  
Significant Information ◽  
Essential Information ◽  
Practical Applications ◽  
Digital Elevation ◽  
Global Positioning ◽  
Differential Global Positioning System

The Digital Elevation Model (DEM) has been known as a quantitative description of the surface of the Earth, which provides essential information about the terrain. DEMs are significant information sources for a number of practical applications that need surface elevation data. The open-source DEM datasets, such as the Advanced Space-borne Thermal Emission and Reflection Radiometer (ASTER), the Shuttle Radar Topography Mission (SRTM), and the Advanced Land Observing Satellite (ALOS) usually have approximately low accuracy and coarser resolution. The errors in many datasets of DEMs have already been generally examined for their importance, where their quality could be affected within different aspects, including the types of sensors, algorithms, terrain types, and other features. Ground control points (GCPs) used in this study were observed through the utilization of differential global positioning system (DGPS) with dual frequencies. Statistical indices were used to compare, evaluate, and validate the DEMs data against DGPS data. Statistical analysis of DEMs pointed out that SRTM accuracy was higher, with Root Mean Square Error (RMSE) of ±6.276m as compared to the other DEMs. ASTER showed the biggest residual error with an RMSE of ±10.241m. Nevertheless, ALOS was noticeably improved by having an RMSE of ±6.988m.

Movements and habitat selection by wild dogs in eastern Victoria

2010 ◽  
Vol 32 (1) ◽  
pp. 23 ◽  
Author(s):  
Alan Robley ◽  
Andrew Gormley ◽  
David M. Forsyth ◽  
Alan N. Wilton ◽  
Danielle Stephens
Keyword(s):  
Habitat Selection ◽  
Home Range ◽  
Global Positioning System ◽  
Canis Lupus ◽  
Home Ranges ◽  
Canis Lupus Familiaris ◽  
Eastern Australia ◽  
Global Positioning ◽  
Wild Dog ◽  
Wild Dogs

To investigate movements and habitat selection by wild dogs we attached satellite-linked global positioning system (GPS) units to nine wild dogs (Canis lupus dingo and Canis lupus familiaris) captured in eastern Victoria in summer 2007. Units estimated locations at 30-min intervals for the first six months and then at 480-min intervals for six more months. DNA testing revealed all these wild dogs to be related. Home ranges of males were almost three times larger than those of females (males: 124.3 km2 ± 56.3, n = 4; females: 45.2 km2 ± 17.3, n = 5) and both sexes preferred subalpine grassland, shrub or woodland at the landscape and home-range scales. Wild dogs were recorded more often than expected within 25 m of roads and less often than expected within 25 m of watercourses. Wild dogs displayed higher-velocity movements with shallow turning angles (generally forwards) that connected spatial and temporal clusters comprising slower-velocity, shorter, and sharper turning movements. One wild dog travelled 230 km in 9 days before returning to its home range and another travelled 105 km in 87 days. The home-range sizes reported in this study are much larger than previously reported in south-eastern Australia. This finding, together with previous studies, suggests that the spatial scale at which wild dog management occurs needs to be reconsidered.

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
Keyword(s):  
Global Positioning System ◽  
Wind Direction ◽  
Morphological Changes ◽  
River Mouth ◽  
Field Work ◽  
Google Earth ◽  
Aerial Photographs ◽  
Ocean Energy ◽  
Global Positioning ◽  
Periodic Models

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.

Geoheritage and Potential Geotourism Sites in Spiti Valley, Himachal Pradesh, India

2021 ◽  
Author(s):  
Krishnanand Krishnanand
Keyword(s):  
Global Positioning System ◽  
Hot Spots ◽  
Swot Analysis ◽  
Field Work ◽  
Himachal Pradesh ◽  
Human Society ◽  
Global Positioning ◽  
Gis Software ◽  
Depth Interviews ◽  
Structured Questionnaire

<p>Geoheritage are those components of geodiversity that are specifically identified as having conservation significance; that have some specific value to human society and therefore ought to be conserved, particularly if they are threatened by human activities and could therefore be lost or damaged. The Spiti valley of Himachal Pradesh, India is unique due to the presence of Tethyan sediments that are exposed and have abundance of fossils that makes it a rich and valuable geoheritage site. The research focuses upon the study of various existing tourist hot spots and potential geoheritage sites. The main objective of the study is to assess the human response (geotourism) to the diversity of existing and potential geoheritage sites in the area. The study is largely based on the field work conducted in the study area between 2014-19 in which data has been collected through structured questionnaire survey, observation and in-depth interviews through field work and SWOT analysis has been done accordingly. The locations of geoheritage sites have been marked using Global positioning System (GPS) and an overlay map has been prepared using Arc Map 10 (GIS software). Overall, the major issue is the lack of geoconservation policy and inaccessibility which needs to be addressed with better management efforts such as Fossil Park or geo-park establishment.</p><p><strong>Key words:</strong> Geoheritage, Geotourism, Spiti Valley, Potential Geoheritage Sites, Fossil Park</p>

scholarly journals Glacier changes in southern Spitsbergen, Svalbard,1901–2000

2003 ◽  
Vol 37 ◽  
pp. 219-225 ◽  
Author(s):  
Anja Pälli ◽  
John C. Moore ◽  
Jacek Jania ◽  
Piotr Glowacki
Keyword(s):  
Global Positioning System ◽  
Ground Penetrating Radar ◽  
East Coast ◽  
Aerial Photographs ◽  
Positioning System ◽  
Digital Elevation ◽  
Glacier Changes ◽  
Global Positioning ◽  
Glaciated Valley ◽  
Ground Penetrating

AbstractHigh-resolution ground-penetrating radar surveys at 50 MHz on the polythermal glaciers Hornbreen, Hambergbreen and several surrounding glaciers in southern Spitsbergen, Svalbard, are presented and interpreted. Accurate positioning was obtained using differential global positioning system (DGPS). Digital elevation models (DEMs) of the bedrock and surface were constructed. Comparison of DGPS data and surface DEMs with data from the topographic mappings from 1936 oblique stereoscopic aerial photographs and from Mission Russe in 1899–1901 shows that the Hornbreen and Hambergbreen surfaces are about 60–100 m thinner today in the upper part than at the beginning of the 20th century. Hornbreen has retreated by 13.5 km from the central part of the front, and Hambergbreen by 16 km. All the fronts of the nearby east-coast glaciers in this area have retreated. The bedrock DEM shows that the Hornbreen and Hambergbreen beds lie at –25 to 25 m a.s.l. The combination of sub-sea-level fronts and increasing steepness of the glaciers suggests that the low-lying glaciated valley filled by Hornbreen and Hambergbreen may become a partially inundated ice-free isthmus within perhaps 100 years.

scholarly journals GPS: FERRAMENTA DE APOIO NA REALIZAÇÃO DE INVENTÁRIO FLORESTAL

FLORESTA ◽  
2002 ◽  
Vol 32 (1) ◽  
Author(s):  
Luciano Farinha Watzlawick ◽  
Carlos Roberto Sanquetta ◽  
Flávio Felipe Kirchner
Keyword(s):  
Global Positioning System ◽  
Forest Inventory ◽  
Geographical Location ◽  
Field Work ◽  
Positioning System ◽  
Helpful Tool ◽  
Forest Inventories ◽  
Global Positioning ◽  
Medium Level ◽  
Definition Of

O posicionamento e a instalação de unidades amostrais em trabalhos de Inventário Florestal exigem critérios (métodos e processos), que podem ser facilitados com o uso de recursos tecnológicos, saindo de uma esfera teórica para a prática. Neste sentido, o presente trabalho tem como finalidade apresentar um exemplo concreto de aplicação do Sistema de Posicionamento Global (GPS) para fornecer a posição geográfica (latitude e longitude) e a altitude do terreno em relação ao nível médio dos mares de parcelas amostrais em um inventário florestal. O processo de amostragem para o Inventário Florestal foi à amostragem sistemática em dois estágios. Concluiu-se que a utilização do GPS, como ferramenta de localização, navegação e apoio ao inventário florestal, proporcionou melhor rendimento, bem como uma economia de tempo e recursos na execução da atividade. GPS: A Helpful Tool in Forest Inventory Abstract Positioning and establishing sample plots in forest inventories are tasks which require the definition of some criteria (methods and processes). This may be facilitated by using some technological devices that make the survey a very practical task. In this connection, this work aimed at presenting a clear example of application of Global Positioning System (GPS) used to give the geographical location (latitude and longitude) as well as the altitude of the land in relation to the medium level the seas of forest inventory sample plots. The sampling scheme used in the inventory was the double stage systematic process. It was noticed that GPS utilization, of location, sailing and as a tool to support forest inventory plot establishment, provides better efficiency in field work as well as improved time and resources use.

scholarly journals The marine digital terrain model of the Panarea caldera (Aeolian Islands, Southern Italy)

1998 ◽  
Vol 41 (2) ◽  
Author(s):  
M. Anzidei
Keyword(s):  
Global Positioning System ◽  
Digital Terrain Model ◽  
Volcanic Area ◽  
Terrain Model ◽  
Digital Terrain ◽  
Digital Elevation ◽  
Global Positioning ◽  
Geodetic Technique ◽  
Elevation Model ◽  
Navigation Software

A Marine Digital Elevation Model (MDEM) of the still active volcanic area of Panarea caldera is presented in this paper. A fast and accurate survey was performed by means of the Differential Global Positioning System (DGPS) geodetic technique coupled with an echo-sounding gear and a real time navigation software. The instrumentation was installed on board of a low draught boat in order to collect data starting from the bathymeter of one meter. Planar positions and depths were obtained with average accuracies of 30 cm and 10 cm respectively providing a 3D map of the seafloor useful for geomorphological, geophysical and volcanic hazard applications.

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