scholarly journals Integrating Field and GIS-based Surveys to Map the Distribution and Characterize the Ecological Habitat for Conservation Management of Georgia Plume, a Rare Endemic

HortScience ◽  
2013 ◽  
Vol 48 (2) ◽  
pp. 158-163
Author(s):  
Justin A. Porter ◽  
David Berle ◽  
Hazel Y. Wetzstein
Keyword(s):  
Global Positioning System ◽  
Census Data ◽  
Plant Conservation ◽  
Rare Plants ◽  
Aerial Photographs ◽  
Conservation Strategies ◽  
Distribution Data ◽  
Global Positioning ◽  
Ecological Habitat ◽  
Rare Endemic

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.

scholarly journals SIZE AND FISHING GROUND OFWAHOO (Acanthocybium solandri Cuvier, 1832) FROM CATCH DATA OF TUNA LONGLINE OPERATED IN INDIAN OCEAN

2012 ◽  
Vol 18 (2) ◽  
pp. 101
Author(s):  
Agustinus Anung Widodo ◽  
Fayakun Satria ◽  
Budi Nugraha
Keyword(s):  
Indian Ocean ◽  
Size Distribution ◽  
Global Positioning System ◽  
Fishing Ground ◽  
Vertical Position ◽  
Distribution Data ◽  
Long Line ◽  
Global Positioning ◽  
Product Species ◽  
Warm Temperate

Wahoo (<em>Acanthocybium solandri</em> Cuvier, 1832) is a member of the Scombrid family, is a pelagic (open ocean) species found worldwide in tropical and warm-temperate seas. It is fished throughout its range by artisanal, recreational, and commercial. Wahoo is one of the by-product species of the tuna long line fleets operate in Indian Ocean. This paper describes status of wahoo resource caught by tuna long line in Indian Ocean based at Benoa-Bali. Data obtained from onboard observer program on the tuna long liner based at Benoa-Bali during 2005-2010. Total of 85 trips of onboard observation were carried out with the total long line sets (one set per day) were 2873 times. The data covered the horizontal and vertical position of tuna long line hooks caught the wahoo, hook rate and fish size distribution. Data of horizontal fishing positions (coordinates) gained from the global positioning system availabled in the tuna long liners. The depth of the long line gear in the waters and teperature of waters were measured by mini-loggers TDR type SP2T-1200, brand: NKE Micrel. Hook rate of wahoo is calculated using the Klawe (1986) method. Result of research showed that the wahoos caught by tuna long lines based at Benoa spread horizontally between 1o31’-33o 40’S and 77o18’-117o53’E and spread vertically between the depth of 75.2- 285.7 m. From 85 tuna long line fishing trips, only about 50% of 85 tuna long line fishing trips caught wahoo with hook rate ranged 0.947-1.399 per 1000 hooks/setting. Size distribution of wahoo ranged 70-180cm with modus ranged 101-110cm.

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.

Evaluation of a soft-copy photogrammetry system for tree-plot measurements

1993 ◽  
Vol 23 (9) ◽  
pp. 1781-1785 ◽  
Author(s):  
P.A. Gagnon ◽  
J.P. Agnard ◽  
C. Nolette
Keyword(s):  
Global Positioning System ◽  
Large Scale ◽  
Tree Height ◽  
Aerial Photographs ◽  
Positioning System ◽  
Crown Diameter ◽  
Forest Inventories ◽  
Global Positioning ◽  
Soft Copy

This article describes and evaluates the application of a soft-copy photogrammetry system to large-scale forest inventories. A specially designed software, developed by the authors, has been investigated in terms of accuracy and general operability. Tests based on 1:1100 color aerial photographs, taken with a 10-m cross-boom system and digitized at resolutions of 300, 450, and 600 dots per inch, confirmed the expected tree-height accuracies of 48, 32, and 24 cm, respectively. This indicates that a photographic scale of 1:800 and a scanning resolution of 800 dots per inch could produce a tree-height precision of the order of 10 cm. The tests have shown that model orientation takes about 15 min; for a tree plot of 24 trees, measurements (height and crown diameter) and observations (species and condition) also take about 15 min. As the important problem of positioning a helicopter over a tree plot has now been solved using global positioning system receivers, the results and information presented in this paper indicate that the existing technology can provide a rigorous and operational photogrammetric system for large-scale forest inventories and regeneration monitoring.

The cartographic dimensions of humanitarianism: Mapping refugee spaces in post-earthquake Haiti

2014 ◽  
Vol 26 (3) ◽  
pp. 251-275 ◽  
Author(s):  
April Shemak
Keyword(s):  
Global Positioning System ◽  
Aerial Photographs ◽  
Internally Displaced Persons ◽  
Refugee Camps ◽  
Displaced Persons ◽  
Internally Displaced ◽  
Us Military ◽  
Global Positioning ◽  
Visual Text ◽  
High Resolution Satellite Imagery

This article examines the post-earthquake politics of space via the literal and cultural mapping of internally displaced persons in Haiti to consider the cartographic dimensions of humanitarian biopower. I begin by analyzing OpenStreetMap Haiti, an online collaborative cartographic project, which mapped Haiti’s roads and refugee camps after the earthquake by using high-resolution satellite imagery, global positioning system technologies, and aerial photographs—much of which is derived from US military data—in order to facilitate “humanitarian” efforts on the ground. I contend that the visual text produced by OpenStreetMap Haiti, which functions as a map to locate and situate refugees, represents a particular form of humanitarian biopower. In the second half of this article, I analyze a 2012 work of comics journalism titled Tents beyond Tents, which offers a critique of humanitarian “aid” from the perspective of Haitians who occupy the internally displaced persons camps created after the earthquake. I consider how the comic functions as a cartographic project, or cartoon mapping, through depictions of the spaces of the refugee camps in and around Port-au-Prince.

scholarly journals Mahonia oiwakensis Hayata (=Mahonia lomariifolia) (Berberidaceae): A new species for the alien flora of South Africa

Bothalia ◽  
2018 ◽  
Vol 48 (1) ◽  
Author(s):  
Thulisile P. Jaca ◽  
Mbali A. Mkhize
Keyword(s):  
South Africa ◽  
Global Positioning System ◽  
Nature Reserve ◽  
First Record ◽  
Distribution Data ◽  
Type Specimens ◽  
Alien Flora ◽  
Global Positioning ◽  
Two Populations ◽  
A New Species

Background: A first record of a naturalised population of Mahonia oiwakensis (=Mahonia lomariifolia) in South Africa is presented. The species is native to China and is cultivated in South Africa as an ornamental plant.Objectives: To document a new record of M. oiwakensis, provide a brief description of its morphology and note its ecology and current distribution outside of cultivation in South Africa.Method: Plants were studied in the field and herbarium vouchers were collected and compared with images of type specimens. Distribution data were collected by means of global positioning system coordinates for each plant, and vegetation and habitat types were recorded for the sites where M. oiwakensis was collected.Results: Two populations of 16 plants were found in South Africa, Gauteng, Pretoria, in the Faerie Glen Nature Reserve and Moreleta Kloof Nature Reserve, in the natural savannah biome, in thornveld and bushveld vegetation.Conclusions: Mahonia oiwakensis has naturalised in South Africa. Further research is paramount to determine whether the species poses a substantial threat and whether it should be regulated and prioritised for management. It is recommended that this species should be added to the species under surveillance for potential eradication or containment targeting.

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.

GPS and GSM Based Tracking System for Objects Moving over Wide Geographical Areas

2018 ◽  
Vol 2 (1) ◽  
Author(s):  
Fatima Ameen ◽  
Ziad Mohammed ◽  
Abdulrahman Siddiq
Keyword(s):  
Global Positioning System ◽  
Mobile Communications ◽  
Moving Objects ◽  
Tracking System ◽  
Geographical Area ◽  
Tracking Systems ◽  
Acceptable Result ◽  
Internet Service ◽  
Global Positioning ◽  
Tracking Objects

Tracking systems of moving objects provide a useful means to better control, manage and secure them. Tracking systems are used in different scales of applications such as indoors, outdoors and even used to track vehicles, ships and air planes moving over the globe. This paper presents the design and implementation of a system for tracking objects moving over a wide geographical area. The system depends on the Global Positioning System (GPS) and Global System for Mobile Communications (GSM) technologies without requiring the Internet service. The implemented system uses the freely available GPS service to determine the position of the moving objects. The tests of the implemented system in different regions and conditions show that the maximum uncertainty in the obtained positions is a circle with radius of about 16 m, which is an acceptable result for tracking the movement of objects in wide and open environments.

Aplikasi Pemosisi Lokal Berbasis Android Dengan Menggunakan GPS

INTI TALAFA ◽  
2018 ◽  
Vol 8 (2) ◽  
Author(s):  
Yaman Khaeruzzaman
Keyword(s):  
Global Positioning System ◽  
Positioning System ◽  
Database Server ◽  
Global Positioning

Seiring dengan pesatnya kemajuan teknologi saat ini, kebutuhan manusia menjadi lebih beragam, termasuk kebutuhan akan informasi. Tidak hanya media informasinya yang semakin beragam, jenis informasi yang dibutuhkan juga semakin beragam, salah satunya adalah kebutuhan informasi akan posisi kita terhadap lingkungan sekitar. Untuk memenuhi kebutuhan itu sebuah sistem pemosisi diciptakan. Sistem pemosisi yang banyak digunakan saat ini cenderung berfokus pada lingkup ruang yang besar (global) padahal, dalam lingkup ruang yang lebih kecil (lokal) sebuah sistem pemosisi juga diperlukan, seperti di ruang-ruang terbuka umum (taman atau kebun), ataupun dalam sebuah bangunan. Sistem pemosisi lokal yang ada saat ini sering kali membutuhkan infrastruktur yang mahal dalam pembangunannya. Aplikasi Pemosisi Lokal Berbasis Android dengan Menggunakan GPS ini adalah sebuah aplikasi yang dibangun untuk memenuhi kebutuhan pengguna akan informasi lokasi dan posisi mereka terhadap lingkungan di sekitarnya dalam lingkup ruang yang lebih kecil (lokal) dengan memanfaatkan perangkat GPS (Global Positioning System) yang telah tertanam dalam perangkat smartphone Android agar infrastruktur yang dibutuhkan lebih efisien. Dalam implementasinya, Aplikasi Pemosisi Lokal ini bertindak sebagai klien dengan dukungan sebuah Database Server yang berfungsi sebagai media penyimpanan data serta sumber referensi informasi yang dapat diakses melalui jaringan internet sehingga tercipta sebuah sistem yang terintegrasi secara global. Kata kunci: aplikasi, informasi, pemosisi, GPS.

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