scholarly journals A NEW GEOGRAPHIC CONTEXT MEASURE TO SIMILARITY ASSESSMENT BASED ON THE SHAPE CONTEXT DESCRIPTOR

Author(s):  
E. M. A. Xavier ◽  
M. A. Ureña-Cámara ◽  
F. J. Ariza-López

Abstract. Nowadays there are many geospatial datasets available for the same area. This large availability is derivative from the advances in remote sensing processes, which includes the popularization of drones and the increasing number of satellite platforms. These data are built by distinct producers, with different requirements. It is fair presume that a more complete version of these datasets can be created using data integration techniques. Among them we can find the map conflation methods, in which the first phase often begins with an alignment between the datasets assessed. The procedure of find these correspondences between geospatial datasets is called matching. In this study we present a new geographic context measure that can be used to implement a new matching method at the feature level. This new measure is based on the shape context descriptor proposed by Belongie. The experiments showed that our approach is a feasible solution, which is less sensible to data disturbance then other traditional methods.

Terra Nova ◽  
1997 ◽  
Vol 9 (4) ◽  
pp. 180-183 ◽  
Author(s):  
W. X. Peng ◽  
J. L. Van Genderen ◽  
G. F. Kang ◽  
H. Y. Guan ◽  
Y. J. Tan

2008 ◽  
Vol 40 (11) ◽  
pp. 46-56
Author(s):  
Ludmila I. Samoilenko ◽  
Sergey A. Baulin ◽  
Tatyana V. Ilyenko ◽  
Margarita A. Kirnosova ◽  
Ludmila N. Kolos ◽  
...  

2021 ◽  
Vol 13 (2) ◽  
pp. 283
Author(s):  
Junzhe Zhang ◽  
Wei Guo ◽  
Bo Zhou ◽  
Gregory S. Okin

With rapid innovations in drone, camera, and 3D photogrammetry, drone-based remote sensing can accurately and efficiently provide ultra-high resolution imagery and digital surface model (DSM) at a landscape scale. Several studies have been conducted using drone-based remote sensing to quantitatively assess the impacts of wind erosion on the vegetation communities and landforms in drylands. In this study, first, five difficulties in conducting wind erosion research through data collection from fieldwork are summarized: insufficient samples, spatial displacement with auxiliary datasets, missing volumetric information, a unidirectional view, and spatially inexplicit input. Then, five possible applications—to provide a reliable and valid sample set, to mitigate the spatial offset, to monitor soil elevation change, to evaluate the directional property of land cover, and to make spatially explicit input for ecological models—of drone-based remote sensing products are suggested. To sum up, drone-based remote sensing has become a useful method to research wind erosion in drylands, and can solve the issues caused by using data collected from fieldwork. For wind erosion research in drylands, we suggest that a drone-based remote sensing product should be used as a complement to field measurements.


2021 ◽  
Author(s):  
J. Dashti ◽  
B. Al-Ajmi ◽  
H. Sabri ◽  
B. Al-Adsani ◽  
H. Farwan ◽  
...  

2017 ◽  
Vol 29 (2) ◽  
pp. 105
Author(s):  
A.A Gde Bagus ◽  
Hedwi Prihatmoko

Gunung Kawi Temple is one of the most monumental archaeological remains in Bali originating from the 10th to 11th century. This study aims to determine the values of local wisdom of ancient Balinese society related to the construction and presence of Gunung Kawi Temple. Data were collected through literature study and observation. Analysis was conducted through qualitative approach using data integration and explanation based on theory. Explanation is presented in narrative text. The results of this study indicate that the construction using the concept of cliff temple is an adaptation in addressing the limitations of geography and material resources. This adaptation is a form of ancient Balinese society local wisdom. This local wisdom is also reflected on the environmental preservation value which is related to the function of Gunung Kawi Temple as a religious sacred building. Keywords: gunung kawi, cliff temple, local wisdom, adaptation, enviromental preservation. Kompleks Candi Gunung Kawi merupakan salah satu tinggalan arkeologi paling monumental di Bali yang berasal dari abad ke-10 sampai 11 Masehi. Kajian ini bertujuan untuk mengetahui nilainilai kearifan lokal masyarakat Bali Kuno yang terkait dengan pembangunan dan keberadaan Kompleks Candi Gunung Kawi. Pengumpulan data dilakukan melalui studi kepustakaan dan observasi. Analisis dilakukan melalui pendekatan kualitatif dengan pengintegrasian data dan memaparkan simpulan-simpulan berdasarkan teori. Pembahasan kemudian disajikan dalam bentuk teks naratif. Hasil kajian ini menunjukkan bahwa pembangunan dengan konsep candi tebing merupakan bentuk adaptasi dalam menyikapi keterbatasan geografi dan sumber bahan baku. Adaptasi tersebut merupakan salah satu wujud kearifan lokal masyarakat Bali Kuno. Kearifan lokal tercermin juga dari nilai pelestarian lingkungan yang terkait dengan fungsi Kompleks Candi Gunung Kawi sebagai bangunan suci keagamaan. 


Author(s):  
Evelyn Merrill ◽  
Cathy Wilson ◽  
Ronald Marrs

Traditional methods for measurement of vegetative biomass can be time-consuming and labor­intensive, especially across large areas. Yet such estimates are necessary to investigate the effects of large scale disturbances on ecosystem components and processes. One alternative to traditional methods for monitoring rangeland vegetation is to use satellite imagery. Because foliage of plants differentially absorbs and reflects energy within the electromagnetic spectrum, remote sensing of spectral data can be used to quantify the amount of green vegetative biomass present in an area (Tucker and Sellers 1986).


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