Journal of Geodesy and Geoinformation Science最新文献_第3页

Kentsel teknik altyapı tesislerine yönelik uluslararası coğrafi veri modellerinin analizi

Journal of Geodesy and Geoinformation Science Pub Date : 2021-09-13 DOI: 10.9733/jgg.2022r0003.t

Azer İlgar, Volkan Çağdaş

引用次数: 0

Toprak neminin yarı kurak alanlarda çok zamanlı RADARSAT-2 verileri ile incelenmesi

Journal of Geodesy and Geoinformation Science Pub Date : 2021-08-12 DOI: 10.9733/jgg.2022r0001.t

Sevinç Madenoğlu, Hesna Özcan, Murat Remzi Peker, Melis Özge Pinar, Suat Akgül, Mehmet Keçeci, Tülay Tunçay, Mahmut Hilmi Seçmen, A. Koç, Musta Üstüner, Aliihsan Şekertekin, Saygın Abdikan, M. Esetlili, Aynur Şensoy Şorman, Şinasi Kaya, Günay Erpul, Füsun Balık Şanlı

{"title":"Toprak neminin yarı kurak alanlarda çok zamanlı RADARSAT-2 verileri ile incelenmesi","authors":"Sevinç Madenoğlu, Hesna Özcan, Murat Remzi Peker, Melis Özge Pinar, Suat Akgül, Mehmet Keçeci, Tülay Tunçay, Mahmut Hilmi Seçmen, A. Koç, Musta Üstüner, Aliihsan Şekertekin, Saygın Abdikan, M. Esetlili, Aynur Şensoy Şorman, Şinasi Kaya, Günay Erpul, Füsun Balık Şanlı","doi":"10.9733/jgg.2022r0001.t","DOIUrl":"https://doi.org/10.9733/jgg.2022r0001.t","url":null,"abstract":": Soil moisture content is a very important factor in terms of energy exchange and water cycle on Earth and has a great impact in many areas regarding assessment of natural risks, hydrology, ecology, agriculture, and climate science. Soil moisture can greatly change spatially and temporally, especially depending on land use changes, and the changing soil moisture may cause various environmental and ecological problems. In this respect, it is an important research subject to examine the spatial change of soil moisture content on large scales. Synthetic Aperture Radar (SAR) sensors play an important role in detecting soil moisture because they are sensitive to soil moisture and they cover large areas. In this study, it was aimed to investigate the determination of the spatial and temporal variation of soil moisture content using fully polarimetric RADARSAT-2 images in wheat cultivated field and fallow land located in The General Directorate of Agricultural Enterprises Gözlü Agricultural Enterprise. The in-situ measurements obtained monthly from field surveys between March and October 2016 were compared with the backscatter values of SAR images. As a result of the study, negative and positive correlation coefficients varying from -0.65 to 0.67 were obtained between backscatter values and in-situ soil moisture values. The highest correlations for soil moisture were obtained in the cultivated area during the May-June period, which is the growing stage of wheat, and the best results for both areas were determined with VV polarimetric data.","PeriodicalId":33920,"journal":{"name":"Journal of Geodesy and Geoinformation Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85056544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

ITRF96-ED50 Transformasyonu: Radyal esaslı enterpolasyon ve küresel harmonik modelleme

Journal of Geodesy and Geoinformation Science Pub Date : 2021-08-12 DOI: 10.9733/jgg.2022r0002.t

İ. Deniz, Şenol Hakan Kutoğlu, Rasim Deniz

引用次数: 0

Effect of altitude and distance on zenith tropospheric delay and integrated water vapour estimations in a local GNSS CORS network 海拔和距离对局地GNSS CORS网络天顶对流层延迟和综合水汽估算的影响

Journal of Geodesy and Geoinformation Science Pub Date : 2021-01-13 DOI: 10.9733/JGG.2021R0006.E

Ömer Gökdaş, M. T. Ozludemir

{"title":"Effect of altitude and distance on zenith tropospheric delay and integrated water vapour estimations in a local GNSS CORS network","authors":"Ömer Gökdaş, M. T. Ozludemir","doi":"10.9733/JGG.2021R0006.E","DOIUrl":"https://doi.org/10.9733/JGG.2021R0006.E","url":null,"abstract":"In this paper, to investigate the usability of Continuously Operating Reference Stations managed by the Istanbul Water and Sewerage Administration (ISKI CORS) for weather prediction studies, the effects of altitude and distance on Zenith Tropospheric Delay (ZTD) and Integrated Water Vapour (IWV) estimations were analysed. Within the scope of this study, the authors determined accuracies of ZTD and IWV values based on the selected reference stations and analysed them for altitude and distance factors. GnSmart software is used for ZTD estimation as this software broadcasts CORS correction and GNSS Analysis and Positioning Software (GAPS) is used for IWV estimation. In this study, a single reference station was used to test the accuracy of ZTD and IWV values obtained from local ISKI CORS network stations (TUZL station for ZTD values and radiosonde station numbered 17064 for IWV values). The determined RMSE values could not reach the ZTD and IWV precision standards of the World Meteorology Organization (WMO). One reason for this is that a single station is selected as a reference. In short, the authors express that the ZTD and IWV values of ISKI CORS stations are not similar, but there is a significant difference between them. It was also understood that a single radiosonde station is not sufficient to determine the IWV values of the stations in the local ISKI CORS network, and the GNSS IWV values obtained from the stations can be meaningful.","PeriodicalId":33920,"journal":{"name":"Journal of Geodesy and Geoinformation Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83167678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The performance analyses of support vector machine classifiers for examination of the temporal change of land-use/cover in the Beyşehir Basin in Turkey (1984-2018) 支持向量机分类器在土耳其bey<e:1> ehir流域土地利用/覆被时空变化研究中的性能分析

Journal of Geodesy and Geoinformation Science Pub Date : 2020-12-30 DOI: 10.9733/jgg.2021r0005.e

Munevver Gizem Gumus, S. Durduran

{"title":"The performance analyses of support vector machine classifiers for examination of the temporal change of land-use/cover in the Beyşehir Basin in Turkey (1984-2018)","authors":"Munevver Gizem Gumus, S. Durduran","doi":"10.9733/jgg.2021r0005.e","DOIUrl":"https://doi.org/10.9733/jgg.2021r0005.e","url":null,"abstract":": This study aimed to investigate the temporal change in land-use/cover in the Beyşehir-Kaşaklı Subbasin, which is one of the nine subbasins of the Konya Closed Basin and known as the largest closed basin in Turkey, using Remote Sensing and Geographic Information Systems techniques. For this purpose, in the study, Landsat Thematic Mapper, Enhanced Thematic Mapper, and Operational Land Imager digital satellite images obtained in the years 1984, 1990, 1996, 2000, 2006, 2012, and 2018 were used. The Support Vector Machines (SVM) method was applied as the classification method. In order to apply the SVM method, firstly, the kernel function and parameter set, giving the highest accuracy in the classification, were selected. In the study, four different kernel functions and different parameter sets were experienced as different from each other. Seventy-two different models in total were applied using different combinations of parameters. As a result of the trials of seventy-two different parameters, it was concluded that the method and algorithm giving the most accurate result with 83.81% classification accuracy and 0.7949 Kappa statistics were the polynomial function of SVMs. As a result of the classification process examined the period between 1984 and 2018 using the determined algorithm and parameters, it was detected that artificial surfaces increased by 418%, arable agricultural lands and pastures decreased by 14%, forests and semi-natural areas increased by 4%, and coastal wetlands on the coasts increased by 6%. On the other hand, the surface area of the water bodies in the region, which demonstrated a decreasing trend until the year 2003, was determined to increase by 3% with the establishment of Suğla Storage in 2003.","PeriodicalId":33920,"journal":{"name":"Journal of Geodesy and Geoinformation Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74133684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Web tabanlı CSRS-PPP uygulamasının farklı uydu sistemleri üzerindeki performansı

Journal of Geodesy and Geoinformation Science Pub Date : 2020-12-14 DOI: 10.9733/jgg.2021r0004.t

Tuna Erol

{"title":"Web tabanlı CSRS-PPP uygulamasının farklı uydu sistemleri üzerindeki performansı","authors":"Tuna Erol","doi":"10.9733/jgg.2021r0004.t","DOIUrl":"https://doi.org/10.9733/jgg.2021r0004.t","url":null,"abstract":"In evaluating the data provided by Global Navigation Satellite Systems (GNSS), scientific/academic, commercial software, and web-based applications, which are used increasingly, are implemented. The strategy of GNSS data processing is basically divided into two as absolute and relative. The web-based services increasing in use are mainly divided into either using the absolute method or the relative method. Precise Point Positioning (PPP) method makes possible to obtain cm level positioning by using a single receiver and offers possibility of a quite practical positioning for users. Real-time applications of the PPP method are also becoming more and more widespread, which offer both time and cost savings for users. While developments on positioning continue, GPS introduced to the life of human beings in every field besides its military purpose since its first appearance, has become quite common with the introduction of other systems (GLONASS, BeiDou, QZSS, IRNSS etc.). Today, as GNSS, it continues to exist more in our lives. The Multi-GNSS Experiment (MGEX) project has been developed by collecting data at International GNSS Service (IGS) stations spread worldwide, received signals from the satellite systems developed by several countries and by including them to the processing stage and then data collection at the specified stations from all of the satellite systems has been started. In this study, the GNSS observation data collected at 5 MGEX stations scattered around the world for a duration of 10-day were evaluated with a web-based service, namely CSRS-PPP. In the concept of MGEX Project, it is possible to collect data from the stations with an observation duration ranging from 1 to 30 seconds and from multiple satellite systems (GPS, GLONASS, Galileo, QZSS, NAVIC, BeiDou, SBAS). In the evaluation stage of CSRS-PPP application, the evaluation performance was examined and concluded in terms of satellite systems used as GPS and GNSS (GPS, GLONASS, and GPS+GLONASS), data record interval ranging as 1 and 30 seconds, and observation duration from 15 minutes to 24 hours.","PeriodicalId":33920,"journal":{"name":"Journal of Geodesy and Geoinformation Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85296648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Çoklu-GNSS çözümlerinin performansının internet tabanlı Trimble RTX servisi ile incelenmesi

Journal of Geodesy and Geoinformation Science Pub Date : 2020-11-11 DOI: 10.9733/jgg.2021r0003.t

Gizem Sezer, A. Doğan, Bahattin Erdoğan

{"title":"Çoklu-GNSS çözümlerinin performansının internet tabanlı Trimble RTX servisi ile incelenmesi","authors":"Gizem Sezer, A. Doğan, Bahattin Erdoğan","doi":"10.9733/jgg.2021r0003.t","DOIUrl":"https://doi.org/10.9733/jgg.2021r0003.t","url":null,"abstract":"Gunumuzde jeodezik amacli yapilan calismalarin bircogunda Kuresel Konumlama ve Uydu Sistemleri’ne (Global Navigation Satellite System, GNSS) ait veriler kullanilmaktadir. GNSS yapisinda, GPS, GLONASS, Galileo ve BeiDou uydu sistemleri beraber degerlendirilerek konum bilgisi elde edilebilmektedir. Uluslararasi GNSS Servisi (International GNSS Service, IGS) bu amac dogrultusunda farkli sinyal ve uydu sistem verilerinin toplanmasi, izlenmesi ve analiz edilmesi icin Multi-GNSS Experiment (MGEX) adinda bir proje baslatmistir. Coklu-GNSS cozumlerinin kullanilmaya baslamasindan dolayi, bu cozumlerden elde edilen konum dogrulugunun belirlenmesi kullanicilar acisindan buyuk onem arz etmektedir. Bu nedenle bu calismada; 10 noktaya ait GNSS verileri; GPS, GPS/GLONASS, GPS/GLONASS/Galileo ve GPS/GLONASS/Galileo/BeiDou olmak uzere 4 farkli senaryo ile degerlendirilmis ve dogruluk analizleri gerceklestirilmistir. GNSS verilerinin degerlendirilmesi bir internet tabanli yazilim olan ve Coklu-GNSS hassas mutlak nokta konumlama (Precise Point Positioning, PPP) cozum kapasitesine sahip Trimble RTX servisi ile gerceklestirilmistir. Sonuclar, sadece GPS cozumleri yerine farkli uydu kombinasyonlarini birlikte kullanarak daha yuksek dogrulukla konum bilgisi elde edilebilecegini gostermistir. Ayrica, Coklu-GNSS cozum dogruluklarinin gozlem suresi ve enlem bilgisine bagli olup olmadigi da incelenmistir. Sonuclara gore Coklu-GNSS cozum dogruluklarinin sadece gozlem suresine bagli olarak degistigi vurgulanmistir.","PeriodicalId":33920,"journal":{"name":"Journal of Geodesy and Geoinformation Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90514036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hava Lidar verilerinin denetimsiz yapay sinir ağları kullanılarak filtrelenmesi

Journal of Geodesy and Geoinformation Science Pub Date : 2020-11-09 DOI: 10.9733/jgg.2021r0002.t

Alper Sen, Burcu Bayasli

{"title":"Hava Lidar verilerinin denetimsiz yapay sinir ağları kullanılarak filtrelenmesi","authors":"Alper Sen, Burcu Bayasli","doi":"10.9733/jgg.2021r0002.t","DOIUrl":"https://doi.org/10.9733/jgg.2021r0002.t","url":null,"abstract":"Hava Lidar (Light Detection and Ranging) sistemleri ile uretilen mekânsal veriler, yuksek dogruluklu, hizli ve az maliyetli olarak elde edilmektedir. Ancak verilerin nesne cikarimi amaciyla elle islenmesi, zaman alan ve emek yogun bir islemdir. Bu sureci otomatik bir hale donusturmek amaciyla, denetimli/denetimsiz siniflandirma yontemleri kullanilabilmektedir. Lidar verilerinin, zemine ait ve zemine ait olmayan veriler olarak ayrilmasina filtreleme denir. Lidar verileri kullanilarak Sayisal Yukseklik Modeli olusturulmasinda filtreleme islemi buyuk onem arz etmektedir. Bu calismada, Harita Genel Mudurlugu’nun baskanliginda 2014 yilinda uretilen, Riegl LMS-Q1560 Lidar sistemiyle Bergama ilcesinde 1200 metre yukseklikte gerceklestirilen ucus verilerinden elde edilen ayrik-donuslu Lidar test verisi kullanilmistir. Lidar nokta bulutu, denetimsiz bir yapay sinir agi yontemi olan Kendini Duzenleyen Haritalar (KDH) yontemi ile analiz edilerek kumelere ayrilmistir. Kumeler, uydu goruntuleri ile karsilastirilarak nesne siniflari belirlenmistir. Bu yontem ile elde edilen nesne siniflarinin dogrulugu, gorsel olarak siniflari belirlenen tum noktalar incelenerek hesaplanmistir. Sinir agina ait en az noron sayisi, denetimli olarak hata degerlerine gore belirlenmistir. Lidar nokta bulutunun KDH yontemiyle filtrelenmesi sonucu, Tip-1 hatasi %11.54, Tip-2 hatasi %19.43 ve toplam hata %16.41 olarak bulunmustur. Elde edilen sonuclara gore, hava Lidar verilerinin filtrelenmesinde KDH sinir aglarinin belirlenen noron sayisi ile etkin olarak kullanilabildigi gorulmustur.","PeriodicalId":33920,"journal":{"name":"Journal of Geodesy and Geoinformation Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85051721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Tekrarlı yaya yürüyüşü ve kısa süreli kinematik GPS+GLONASS gözlemleriyle PPP yönteminin performans analizi

Journal of Geodesy and Geoinformation Science Pub Date : 2020-09-30 DOI: 10.9733/JGG.2020R0008.T

Nursu Tunalıoğlu

{"title":"Tekrarlı yaya yürüyüşü ve kısa süreli kinematik GPS+GLONASS gözlemleriyle PPP yönteminin performans analizi","authors":"Nursu Tunalıoğlu","doi":"10.9733/JGG.2020R0008.T","DOIUrl":"https://doi.org/10.9733/JGG.2020R0008.T","url":null,"abstract":"Kuresel Konum Belirleme ve Uydu Sistemleri (Global Navigation Satellite Systems, GNSS) tabanli konum belirleme uygulamalarinda Hassas Nokta Konum Belirleme (Precise Point Positioning-PPP) yonteminin etkinligi ve kullanimi bagil konum belirlemeye gore giderek artmaktadir. Buna karsin farkli platformlarda gerceklestirilen statik ve kinematik moddaki bircok calismada geleneksel standart PPP yontemi icin en buyuk dezavantaj tasiyici faz gozlemleri icin yakinsama suresinin uzun olmasidir. Bu nedenle PPP’ye dayali statik ve kinematik moddaki calismalarda gozlem suresi siklikla uzun tutulmaktadir. Gerceklestirilen bu calismada PPP’de gozlem suresine ve dolayisiyla tamsayi belirsizligi cozumune bagli olarak elde edilen konum dogrulugu dikkate alinarak, tekrarli ve kisa sureli yaya yuruyusleriyle elde edilen kinematik GPS+GLONASS gozlemlerinin PPP konum belirleme performansi kisa, orta ve uzun bazlar icin bagil konum belirleme cozumleriyle karsilastirilmistir. Karsilastirma icin dunya genelinde yaygin olarak kullanilan ve tasiyici faz gozlemleri icin yakinsama suresinin kisaltilmasi icin yeni algoritmik yaklasimlar kullanan internet tabanli GNSS veri degerlendirme servisi CSRS-PPP tercih edilmistir. Sonuclar PPP yonteminin kisa sureli kinematik gozlemler icin de bagil cozumlere esdeger sayilacak yuksek dogrulukta konum bilgisinin elde edilmesinde etkin olarak kullanilabilecegini acikca ortaya koymaktadir.","PeriodicalId":33920,"journal":{"name":"Journal of Geodesy and Geoinformation Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78229323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Telekomünikasyon sektöründe kullanılan ek odası kapaklarının sokak düzeyi görüntülerinden tespit edilme başarımının değerlendirilmesi

Journal of Geodesy and Geoinformation Science Pub Date : 2020-09-30 DOI: 10.9733/JGG.2020R0009.T

Ahmet Eğri, Caner Güney

{"title":"Telekomünikasyon sektöründe kullanılan ek odası kapaklarının sokak düzeyi görüntülerinden tespit edilme başarımının değerlendirilmesi","authors":"Ahmet Eğri, Caner Güney","doi":"10.9733/JGG.2020R0009.T","DOIUrl":"https://doi.org/10.9733/JGG.2020R0009.T","url":null,"abstract":"Within the scope of the study, with the proposed method, called innovative method, the manholes used in the telecommunication sector are identified with the deep learning approach from the street-level images and location information of these manholes are produced. In order to evaluate the performance of the innovative method, the results obtained with it in three different study regions located within the borders of the city of Istanbul were compared with the results of the traditional method currently used in the telecommunication sector. During the comparative analysis, the differences between coordinate values of the manholes produced by both methods were determined, the reasons for these differences were emphasized and the possible improvements were discussed. According to the findings, it is concluded that the innovative method cannot replace the traditional method in the current situation. However, if both methods are used together, effectiveness and efficiency in the applications in the telecommunications sector will increase. Nevertheless, in the near future, it is anticipated that the innovative method will replace the traditional method if the suggestions made within the scope of the study are taken into consideration in the solutions of detecting the assets and determining the assets’ coordinates.","PeriodicalId":33920,"journal":{"name":"Journal of Geodesy and Geoinformation Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87573281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0