Evaluating post-fire recovery of Latroon dry forest using Landsat ETM+, unmanned aerial vehicle and field survey data

2021 ◽  
Vol 193 ◽  
pp. 104587
Author(s):  
Bassam Qarallah ◽  
Malik Al-Ajlouni ◽  
Ayman Al-Awasi ◽  
Mohammad Alkarmy ◽  
Emad Al-Qudah ◽  
...  
Keyword(s):  
Survey Data ◽  
Unmanned Aerial Vehicle ◽  
Field Survey ◽  
Dry Forest ◽  
Aerial Vehicle

scholarly journals Monitoring the Invasion ofSpartina alternifloraUsing Very High Resolution Unmanned Aerial Vehicle Imagery in Beihai, Guangxi (China)

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Huawei Wan ◽  
Qiao Wang ◽  
Dong Jiang ◽  
Jingying Fu ◽  
Yipeng Yang ◽  
...  
Keyword(s):  
High Resolution ◽  
Unmanned Aerial Vehicle ◽  
Spartina Alterniflora ◽  
Native Species ◽  
Field Survey ◽  
Negative Impact ◽  
Ecological Engineering ◽  
Control Measures ◽  
Aerial Vehicle ◽  
Very High

Spartina alterniflorawas introduced to Beihai, Guangxi (China), for ecological engineering purposes in 1979. However, the exceptional adaptability and reproductive ability of this species have led to its extensive dispersal into other habitats, where it has had a negative impact on native species and threatens the local mangrove and mudflat ecosystems. To obtain the distribution and spread ofSpartina alterniflora, we collected HJ-1 CCD imagery from 2009 and 2011 and very high resolution (VHR) imagery from the unmanned aerial vehicle (UAV). The invasion area ofSpartina alterniflorawas 357.2 ha in 2011, which increased by 19.07% compared with the area in 2009. A field survey was conducted for verification and the total accuracy was 94.0%. The results of this paper show that VHR imagery can provide details on distribution, progress, and early detection ofSpartina alterniflorainvasion. OBIA, object based image analysis for remote sensing (RS) detection method, can enable control measures to be more effective, accurate, and less expensive than a field survey of the invasive population.

scholarly journals Assessing the Usefulness of Unmanned Aerial Vehicle (UAV) for Monitoring Spatial Plan: Legal and User Perspective of Bogor Regency, Indonesia

2017 ◽  
Vol 4 (2) ◽  
pp. 257
Author(s):  
Dinar Maria
Keyword(s):  
Land Use ◽  
Unmanned Aerial Vehicle ◽  
Field Survey ◽  
Current Approach ◽  
Large Area ◽  
User Perspective ◽  
Urban Dynamics ◽  
Aerial Vehicle ◽  
Asset Monitoring ◽  
Spatial Plan

Monitoring is a critical process in managing the land use plan. However, the current approach to collecting data related to the land use has a shortcoming. First, field survey has limitation due to the high number of resources needed, i.e., people, funds, time. Second, the participatory approach has limitation due to the lack of involvement of the citizens. Unmanned Aerial Vehicle (UAV) has developed in recent years and it has been used in the various field, i.e., urban dynamics, asset monitoring, and so on. The usage of UAV to monitor urban changes has some advantages. First, it can cover a large area and used fewer resources compared with the field survey, in term of man hour, funds and time. Second, it may provide data with a high spatial resolution, which gives a broad possibility for analysing urban features. This research aimed to assess the usefulness of UAV in monitoring the spatial plan of Bogor Regency, Indonesia. We developed indicator according to the legal and user perspective. Our research has shown that UAV may reduce the time and resources needed to monitor the spatial plan. However, the UAV has limitation since it is difficult to indicate the changes of the land use. Therefore, we suggest incorporating with the field survey.

scholarly journals Geomorphology and typing of the Lake Ladoga shores with the use of dron

2019 ◽  
pp. 25-37
Author(s):  
V. M. Anokhin ◽  
D. S. Dudakova ◽  
M. O. Dudakov
Keyword(s):  
Survey Data ◽  
Unmanned Aerial Vehicle ◽  
High Efficiency ◽  
Video Camera ◽  
Lake Ladoga ◽  
Fracture Systems ◽  
Ladoga Lake ◽  
Main Fracture ◽  
Aerial Vehicle ◽  
Northern Shore

The use of an unmanned aerial vehicle (UAV) with a photo-video camera in the shore of Lake Ladoga in 2015 showed its high efficiency for studying the geomorphology of the shores. A number of features of the morphology of the Ladoga shores in several areas have been revealed, including: the structure of the submerged coastal slope on shallow banks has been refined; the main fracture systems for a number of crystalline massifs on the northern shore of the lake have been determined. A new map of the Ladoga Lake shores types was created. The integration of the method of terrestrial and aerial geomorphological surveys with subsequent generalization of the results to space survey data is an effective addition to the method of geomorphological studies of the coasts.

scholarly journals A Study on Obtaining Tree Data from Green Spaces in Parks Using Unmanned Aerial Vehicle Images: Focusing on Mureung Park in Chuncheon

2021 ◽  
Vol 24 (4) ◽  
pp. 441-450
Author(s):  
Do-Hyung Lee ◽  
Sung-Ho Kil ◽  
Su-Been Lee
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Field Survey ◽  
Tree Height ◽  
Green Spaces ◽  
Pinus Koraiensis ◽  
Surface Model ◽  
Average Height ◽  
Short Period ◽  
Aerial Vehicle ◽  
Uav Images

Background and objective: The purpose of study is to analyze the three-dimensional (3D) structure by creating a 3D model for green spaces in a park using unmanned aerial vehicle (UAV) images. Methods: After producing a digital surface model (DSM) and a digital terrain model (DTM) using UAV images taken in Mureung Park in Chuncheon-si, we generated a digital tree height model (DHM). In addition, we used the mean shift algorithm to test the classification accuracy, and obtain accurate tree height and volume measures through field survey. Results: Most of the tree species planted in Mureung Park were Pinus koraiensis, followed by Pinus densiflora, and Zelkova serrata, and most of the shrubs planted were Rhododendron yedoense, followed by Buxus microphylla, and Spiraea prunifolia. The average height of trees measured at the site was 7.8 m, and the average height estimated by the model was 7.5 m, showing a difference of about 0.3 m. As a result of the t-test, there was no significant difference between height values of the field survey data and the model. The estimated green coverage and volume of the study site using the UAV were 5,019 ㎡ and 14,897 ㎥, respectively, and the green coverage and volume measured through the field survey were 6,339 ㎡ and 17,167 ㎥. It was analyzed that the green coverage showed a difference of about 21% and the volume showed a difference of about 13%. Conclusion: The UAV equipped with RTK (Real-Time Kinematic) and GNSS (Global Navigation Satellite System) modules used in this study could collect information on tree height, green coverage, and volume with relatively high accuracy within a short period of time. This could serve as an alternative to overcome the limitations of time and cost in previous field surveys using remote sensing techniques.

scholarly journals CREATING A THREE-DIMENSIONAL MODEL OF THE TERRAIN BASED ON THE SURVEY DATA FROM AN UNMANNED AERIAL VEHICLE

2021 ◽  
Vol 2 (6) ◽  
pp. 87-92
Author(s):  
D.A. Polyakov ◽  
V.K. Barbasov ◽  
A.V Grechishchev
Keyword(s):  
Survey Data ◽  
Unmanned Aerial Vehicle ◽  
Three Dimensional ◽  
Aerial Survey ◽  
Third Party ◽  
Survey Method ◽  
Three Dimensional Model ◽  
Terrain Model ◽  
Aerial Vehicle ◽  
Three Dimensional Models

. Today, three-dimensional models of objects and terrain are a very popular product and are found almost everywhere in our life: in the gaming and film industries, in various industries and complex technological areas such as architecture, construction, medicine, etc. The article considers the creation of a three-dimensional terrain model based on data obtained from an unmanned aerial vehicle to the territory of an aluminum alloy plant located in the city of Podolsk (Lviv microdistrict), Moscow region. The initial data for processing were obtained by a passive aerial survey method – the Phantom 4 PRO apparatus. The main part of the article is devoted to the stages of processing in the Agisoft Metashape software, which include such processes as: importing and aligning the position of cameras (as well as their optimization); building a sparse and dense point cloud; reconstruction of a polygonal three-dimensional terrain model; applying a texture created on the basis of images;optimization of the model and consideration of possible formats for export to third-party software. As a result of the work, a three-dimensional terrain model was obtained with an accuracy of binding to the centers of images of 1.14 m. The time spent on processing the survey data from an unmanned aerial vehicle is no more than 5 hours.

scholarly journals Pemetaan Cepat Kawasan Terdampak Bencana Longsor dan Banjir di Kabupaten Bangli, Provinsi Bali

2017 ◽  
Vol 31 (2) ◽  
pp. 44 ◽  
Author(s):  
Theresia Retno Wulan ◽  
Wiwin Ambarwulan ◽  
Anggara S. Putra ◽  
Mega D Putra ◽  
Dwi Maryanto ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Unmanned Aerial Vehicle ◽  
Aerial Photography ◽  
Field Survey ◽  
Rapid Mapping ◽  
Remote Sensing Technology ◽  
Sensing Technology ◽  
Landslide Event ◽  
Aerial Vehicle ◽  
Post Disaster

Abstrak Teknologi penginderaan jauh mengalami perkembangan yang sangat pesat. Salah satunya adalah teknologi akuisisi data dengan menggunakan UAV (Unmanned Aerial Vehicle).  Teknologi UAV dapat dipergunakan dalam berbagai bidang, salah satunya adalah bidang kebencanaan. Tujuan penelitian ini adalah untuk melakukan pemetaan secara cepat kawasan terdampak bencana banjir dan longsor di Kabupaten Bangli, Bali dengan menggunakan teknologi UAV. Metode yang digunakan adalah pemotretan udara dengan UAV, survei lapangan dan analisis laboratorium. Pemotretan udara dilakukan satu hari pasca kejadian longsor dengan ketinggian jelajah pesawat antara 100-120 meter di atas permukaan tanah. Resolusi spasial yang dihasilkan antara 4,5 - 6,5 cm. Wilayah yang berhasil dipetakan adalah wilayah yang terdampak banjir dan longsor di Desa Songan A serta Songan B, wilayah terdampak banjir bandang Yeh Mampeh di Desa Batur Selatan, serta wilayah terdampak longsor di Desa Sukawana dan Desa Awan. Berdasarkan hasil pemotretan udara, dapat diketahui luasan daerah terdampak longsor. Lebih lanjut, strategi rehabilitasi dan rekonstruksi dapat dilakukan dengan menggunakan hasil pemotretan udara.  Abstrak Remote sensing technology is experiencing rapid developments. One of which is in the field of data acquisition that has currently adopted the use of Unmanned Aerial Vehicle (UAV). UAV technology is, for instance, employed in various studies related to disasters. This research aimed to perform a rapid mapping of flood- and landslide-affected areas in Bangli Regency, Bali using UAV technology. The applied methods included UAV-assisted aerial photography, field survey, and laboratory analysis. The aerial photography was conducted one day after the landslide event and at a recording altitude of 100-120 m above the ground. The spatial resolution produced in the photography was 4.5-6.5 cm. The mapped areas were the ones affected by floods and landslides in Songa A and Songa B Villages, flash floods in Yeh Mampeh, Batur Selatan Village, and landslides in Sukawana and Awan Villages. The aerial photography also provided the extent of the landslide-affected areas. Therefore, the post-disaster rehabilitation and reconstruction strategies can be implemented using the results of the aerial photography.  

Sign in / Sign up

Export Citation Format

Share Document