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Assessment of the completion of the forest cadastre considering the legal grounds, collaboration, and the use of technology The case of Turkey 考虑法律依据、合作和技术使用的森林地籍完成评估土耳其的案例
IF 1.9 Pub Date : 2021-05-17 DOI: 10.26833/IJEG.927502
Orhan Ercan, K. Toker
UN-GGIM and its activities are base on national and regional activities structured with involvement of related organizations of its field for an in-depth discussion as well as activities from a profession. UN-GGIM is a representative and effective consultation mechanism striving to resolve globally challenging issues through utilization of the geospatial information and has a system that can implement directly to policies, factors relating to the global geospatial information with a professional knowledge basis. UN-GGIM pursuing factors are something that cannot be resolved in a short timeframe but through continuing efforts carried out on an extended term.
UN-GGIM及其活动以国家和区域活动为基础,其领域的相关组织参与了深入讨论,并开展了专业活动。UN-GGIM是一个具有代表性和有效的协商机制,致力于通过利用地理空间信息来解决具有全球挑战性的问题,并拥有一个可以在专业知识基础上直接执行与全球地理空间信息相关的政策和因素的系统。UN-GGIM追求的因素不可能在短期内解决,而是通过长期持续努力来解决。
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引用次数: 1
Assessment of shoreline change and its relation with Mangrove vegetation: A case study over North Konkan region of Raigad, Maharashtra, India. 海岸线变化及其与红树林植被关系的评估:印度马哈拉施特拉邦赖加德北康坎地区的案例研究。
IF 1.9 Pub Date : 2021-05-12 DOI: 10.26833/ijeg.912657
Barnali Das, Anargha Dhorde
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引用次数: 2
Investigation of the Performance of Different Wavelet-Based Fusions of SAR and Optical Images Using Sentinel-1 and Sentinel-2 Datasets 基于Sentinel-1和Sentinel-2数据集的SAR和光学图像不同小波融合性能研究
IF 1.9 Pub Date : 2021-04-09 DOI: 10.26833/ijeg.882589
Huseyin Duysak, E. Yiğit
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引用次数: 7
Investigating the Length, Area and Volume Measurement Accuracy in UAV-Based Oblique Photogrammetry Models produced with and without Ground Control Points 有地面控制点和无地面控制点的无人机倾斜摄影测量模型的长度、面积和体积测量精度研究
IF 1.9 Pub Date : 2021-04-09 DOI: 10.21203/RS.3.RS-396298/V1
E. Maraş, M. Nasery
This study was aimed to investigate the performance and sensitivity of a 3D photogrammetric model generated without GCPs (Ground Control Points). To see if the models with no GCPs show the accuracy in every types of terrain as well as climate or metrological conditions, two separate studies are done in two areas with different characteristics such as Altitude, slope, topography, and meteorological varieties. The study areas were initially modelled with GCPs and later without GCPs. Furthermore, some of the dimensions and areas within the modelled area were measured using terrestrial techniques (with GPS/GNSS) for accuracy analysis. After modelling within the areas with and without GCPs, different territories with different slope and geometric shapes were selected. Various measurement in terms of length, area and volume carried out over the selected territories within both model (generated with and without GCPs) of each 2 studies. The datasets obtained as results of measurements were compared to each other and the measurements carried out over the models produced with GCPs were accepted as true values. Results from length measurement provided various level of success. First study area exhibited very promising results in length measurement with a relative error of less than 1% and RMSE (Root Mean Square Error) of 0.139m. In the case of area measurement, in the first study area (Sivas), a minimum relative error of 0.04% and a maximum relative error of 1.05% with a RMSE of 1.264 m² is obtained. In the second study areas (Artvin) for area measurement a minimum relative error of 0.56% and a maximum relative error of 5.27% with a RMSE of 1.76m² is achieved. And finally, in the case of volume measurement, for fist study area (Sivas) a minimum relative error of 0.8% and a maximum relative error of 6.8% as well as 2.301 m³ is calculated. For second study area (Artvin) minimum relative error for volume measurement is 0.502% as well as maximum relative error is 2.01% with a 7.061m³ RMSE.
本研究旨在研究在没有地面控制点的情况下生成的三维摄影测量模型的性能和灵敏度。为了了解没有GCP的模型是否在每种类型的地形以及气候或计量条件下都能显示出准确性,在海拔、坡度、地形和气象品种等不同特征的两个区域进行了两项单独的研究。研究区域最初采用GCP建模,后来不采用GCP。此外,为了进行精度分析,使用地面技术(使用全球定位系统/全球导航卫星系统)测量了建模区域内的一些尺寸和面积。在有和没有GCP的区域内建模后,选择了具有不同坡度和几何形状的不同区域。在每2项研究的两个模型(使用和不使用GCP生成)中,在选定区域进行的长度、面积和体积方面的各种测量。将作为测量结果获得的数据集相互比较,并将对使用GCP生成的模型进行的测量视为真实值。长度测量的结果提供了不同程度的成功。第一个研究区域在长度测量方面表现出非常有希望的结果,相对误差小于1%,均方根误差为0.139m。在面积测量的情况下,在第一个研究区(Sivas)中,最小相对误差为0.04%,最大相对误差为1.05%,均方根偏差为1.264m²。在面积测量的第二个研究区域(Artvin)中,最小相对误差为0.56%,最大相对误差为5.27%,RMSE为1.76m²。最后,在体积测量的情况下,第一个研究区域(Sivas)的最小相对误差为0.8%,最大相对误差为6.8%,以及2.301 m³。对于第二个研究区域(Artvin),体积测量的最小相对误差为0.502%,最大相对误差为2.01%,RMSE为7.061m³。
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引用次数: 5
DETERMINING THE BURIED CONCRETE AMOUNT USING GPR/GPS COMBINATION METHOD 采用探地雷达/ gps联合法确定混凝土埋深量
IF 1.9 Pub Date : 2021-04-05 DOI: 10.26833/ijeg.876310
Celalettin Uçar, F. B. Sanli
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引用次数: 1
Determination of the appropriate zone on dam surface for Floating Photovoltaic System Installation using RS and GISc technologies 利用RS和GISc技术确定浮动光伏发电系统在坝面安装的合适区域
IF 1.9 Pub Date : 2021-03-31 DOI: 10.17632/7VGZ6CDJZ5.1
O. Yilmaz
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引用次数: 5
Comparative analysis of the performance of Multi-GNSS RTK: A case study in Turkey 多GNSS RTK性能的比较分析——以土耳其为例
IF 1.9 Pub Date : 2021-03-19 DOI: 10.26833/ijeg.878236
Omer Faruk Atiz, Ceren Konukseven, Sermet Öğütcü, S. Alcay
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引用次数: 0
INVESTIGATION OF THE EFFECT OF URBANIZATION ON LAND SURFACE TEMPERATURE EXAMPLE OF BURSA 城市化对地表温度影响的研究以布尔萨为例
IF 1.9 Pub Date : 2021-02-01 DOI: 10.26833/ijeg.658377
B. Yamak, Zekeriya Yağci, B. B. Bilgilioğlu, Resul Çömert
Today, industrialization and urbanization in large cities cause an increase in the surfaces covered with man-made objects such as concrete and asphalt. The expansion of urban areas and increase in the using materials with high heat storage properties, directly affect the Land Surface Temperature (LST), which shows an increase in the sensible temperature of the region. LST is directly connected to the natural green vegetation of the land and varies widely in large urban areas, these differences related to the temperature is defined as the ‘urban heat island’. In this study, it was investigated the temporal variation of land surface temperature due to urbanization. Bursa, which is considered as a study area, has shown a rapid population increase since 1990 and a rapid increase in the number of buildings with the impact of urbanization and industrialisation. To determine the effect of this urbanization and industrialisation on land surface temperature, temporal change analysis of the surface temperature in the Bursa was observed with Landsat satellite images of 1988, 1998, 2008 and 2018. From produced maps, it was observed that the amount of green vegetation in urban areas decreased and as a consequence of this decrease, the surface temperature increased in the urban areas.
如今,大城市的工业化和城市化导致混凝土和沥青等人造物体覆盖的表面增加。城市面积的扩大和具有高储热性能的材料的使用增加,直接影响地表温度(LST),这表明该地区的感温增加。LST与土地的天然绿色植被直接相关,在大城市地区差异很大,这些与温度有关的差异被定义为“城市热岛”。在本研究中,研究了城市化引起的地表温度的时间变化。布尔萨被认为是一个研究区域,自1990年以来,随着城市化和工业化的影响,人口迅速增加,建筑数量迅速增加。为了确定这种城市化和工业化对地表温度的影响,利用1988年、1998年、2008年和2018年的陆地卫星图像观察了布尔萨地表温度的时间变化分析。根据绘制的地图,可以观察到城市地区的绿色植被数量减少,因此,城市地区的地表温度升高。
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引用次数: 7
AN INVESTIGATION OF THE PERFORMANCES OF POLARIMETRIC TARGET DECOMPOSITIONS USING GB-SAR IMAGING 基于gb-sar成像的极化目标分解性能研究
IF 1.9 Pub Date : 2021-02-01 DOI: 10.26833/ijeg.665175
S. Demirci, C. Ozdemir
Ground-based synthetic aperture radar (GB-SAR) systems are mostly utilized to be practical practices in improved understanding of the complex mechanism of microwave backscattering. They also provide complementary information on evaluating the validity of the polarimetric analysis of air-borne or satellite-borne SAR applications. This study investigates some capabilities of polarimetric L-band GB-SAR imaging by testing its performance against a typical terrain and various kinds of manmade targets. Trihedral corner reflectors are also included in the analyses because of their importance in data calibration. Polarimetric backscattering signatures of different targets are analyzed in terms of qualitative assessment of amplitude images and identification and classification of scattering mechanisms through target decomposition techniques. The findings of these analyses and detailed discussions are presented. Specifically, the entropy/mean-alpha ((H/α )) classification results are shown to be capable of clearly identifying the dominant scattering mechanisms occurring within the investigated scene.
地面合成孔径雷达(GB-SAR)系统主要用于提高对微波后向散射复杂机制的理解。它们还提供了关于评估机载或星载SAR应用的极化分析有效性的补充信息。本研究通过测试极化L波段GB-SAR成像在典型地形和各种人造目标下的性能,研究了其成像的一些能力。由于三角角反射器在数据校准中的重要性,分析中也包括了三角角反射器。从振幅图像的定性评估以及通过目标分解技术识别和分类散射机制的角度,分析了不同目标的偏振后向散射特征。介绍了这些分析和详细讨论的结果。具体而言,熵/平均α((H/α))分类结果能够清楚地识别所研究场景中发生的主要散射机制。
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引用次数: 4
FULLY OPTIMIZED MULTILAYER RADAR ABSORBER DESIGN USING MULTI-OBJECTIVE ABC ALGORITHM 基于多目标ABC算法的多层雷达吸波器全优化设计
IF 1.9 Pub Date : 2020-12-22 DOI: 10.26833/IJEG.743661
E. Yiğit, Huseyin Duysak
Main purpose of the design of multi-layer radar absorber (MRA) by means of metaheuristic optimization algorithms is to minimize both the total thickness (TT) of MRA and the maximum reflection coefficients for transverse electric (RTE) & transverse magnetic (RTM) polarizations at any oblique angle of incidence. For this purpose, sequence and thicknesses of layers of the MRA have been optimized by either single-objective approach based on combining all objectives or double-objective approach in which TT is evaluated separately from the reflection coefficients. In this study, triple-objective artificial bee colony (TO-ABC) algorithm integrated with Pareto front technique is proposed for fully optimized MRA design. Thus, both RTE, RTM and TT are simultaneously minimized by optimizing thickness, sequence and number of the layers. To demonstrate the superiority of TO-ABC, 3 types of MRAs operating at the frequency ranges of 2–18 GHz for each angle of incidence from 0⁰ to 60⁰ are optimized and compared with the literature. Furthermore, 4 different real MRAs are also optimized using real materials given in the literature. Thanks to the developed graphical user interface and TO-ABC algorithm, despite the limited number of materials, all possible solutions providing the specified parameters are easily achieved and successful MRA structures are designed.
利用元启发式优化算法设计多层雷达吸波器(MRA)的主要目的是使MRA的总厚度(TT)和横向电极化(RTE)和横向磁极化(RTM)在任意斜入射角下的最大反射系数最小。为此,MRA的层序和厚度通过结合所有目标的单目标方法或将TT与反射系数分开评估的双目标方法进行优化。本文提出了一种结合Pareto前沿技术的三目标人工蜂群(TO-ABC)算法,用于MRA的全优化设计。因此,通过优化层厚、层序和层数,可以同时最小化RTE、RTM和TT。为了证明To - abc的优越性,在0⁰到60⁰的每个入射角下,对3种工作在2-18 GHz频率范围内的mra进行了优化并与文献进行了比较。此外,还利用文献中给出的真实材料对4种不同的真实mra进行了优化。由于开发了图形用户界面和to - abc算法,尽管材料数量有限,但提供指定参数的所有可能解决方案都很容易实现,并设计了成功的MRA结构。
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引用次数: 2
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International Journal of Engineering and Geosciences
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