Crop type classification using vegetation indices of rapideye imagery

Ustuner M. | Sanli F.B. | Abdikan S. | Esetlili M.T. | Kurucu Y.

Cutting-edge remote sensing technology has a significant role for managing the natural resources as well as the any other applications about the earth observation. Crop monitoring is the one of these applications since remote sensing provides us accurate, up-to-date and cost-effective information about the crop types at the different temporal and spatial resolution. In this study, the potential use of three different vegetation indices of RapidEye imagery on crop type classification as well as the effect of each indices on classification accuracy were investigated. The Normalized Difference Ve ...Daha fazlası

Konferans Nesnesi 2014 International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives40 ( 7 ) , pp. 1 - 198 631 Görüntülenme

Effects of ocean tide models on GNSS-estimated ZTD and PWV in Turkey

Gurbuz G. | Jin S. | Mekik C.

Global Navigation Satellite System (GNSS) observations can precisely estimate the total zenith tropospheric delay (ZTD) and precipitable water vapour (PWV) for weather prediction and atmospheric research as a continuous and all-weather technique. However, apart from GNSS technique itself, estimations of ZTD and PWV are subject to effects of geophysical models with large uncertainties, particularly imprecise ocean tide models in Turkey. In this paper, GNSS data from Jan. 1st to Dec. 31st of 2014 are processed at 4 co-located GNSS stations (GISM, DIYB, GANM, and ADAN) with radiosonde from Turkis ...Daha fazlası

Konferans Nesnesi 2015 International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives40 ( 1W5 ) , pp. 2 - 258 645 Görüntülenme

Comparison of information contents of high resolution space images

Topan H. | Büyüksalih G. | Jacobsen K.

The information contents of high resolution space images, usable for mapping, are not only depending upon the image resolution that means in case of digital data, depending upon the pixel size in the object space. Important is also the contrast, the spectral range, radiometric resolution and colour beside the atmospheric condition and the object contrast. From the area of Zonguldak, Turkey different space images are available like taken by IKONOS, KVR-1000, SPOT 5, IRS-1C, TK350, ASTER, Landsat TM, JERS and SRTM X-band. Of course the information content is mainly depending upon the pixel size ...Daha fazlası

Konferans Nesnesi 2004 International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives35 608 Görüntülenme

Land cover mapping using sentinel-1 SAR data

Abdikan S. | Sanli F.B. | Ustuner M. | Calò F.

In this paper, the potential of using free-of-charge Sentinel-1 Synthetic Aperture Radar (SAR) imagery for land cover mapping in urban areas is investigated. To this aim, we use dual-pol (VV+VH) Interferometric Wide swath mode (IW) data collected on September 16th 2015 along descending orbit over Istanbul megacity, Turkey. Data have been calibrated, terrain corrected, and filtered by a 5×5 kernel using gamma map approach. During terrain correction by using a 25m resolution SRTM DEM, SAR data has been resampled resulting into a pixel spacing of 20m. Support Vector Machines (SVM) method has been ...Daha fazlası

Konferans Nesnesi 2016 International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives41 , pp. 7 - 761 798 Görüntülenme

Backscatter analysis using multi-temporal Sentinel-1 SAR data for Crop growth of Maize in Konya Basin, Turkey

Abdikan S. | Sekertekin A. | Ustunern M. | Balik Sanli F. | Nasirzadehdizaji R.

Temporal monitoring of crop types is essential for the sustainable management of agricultural activities on both national and global levels. as a practical and efficient tool, remote sensing is widely used in such applications. in this study, Sentinel-1 Synthetic Aperture Radar (SAR) imagery was utilized to investigate the performance of the sensor backscatter image on crop monitoring. Multi-temporal C-band VV and VH polarized SAR images were acquired simultaneously by in-situ measurements which was conducted at Konya basin, central Anatolia Turkey. During the measurements, plant height of mai ...Daha fazlası

Konferans Nesnesi 2018 International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives42 ( 3 ) , pp. 9 - 13 591 Görüntülenme

Insar analysis of ayvacik 2017 (mw 5.3) earthquake swarm (canakkale, nw-Turkey)

Abdikan S. | Imamoglu M. | Alasag T. | Toker M. | Kutoglu S.H. | Sahin S.

In this study, the deformation of Ayvacik Canakkale earthquake and aftershocks of 5.3 (Mw), which were observed on 6 February 2017 in Gulpinar Ayvacik and felt from the surrounding cities, were analyzed by InSAR and strain reduction technique. The earthquake is occurred at the Biga peninsula which is located at the south segment of North Anatolian Fault zone. The first shock (Ml Combining double low line 4.8) started on 14 January 2017 in the region, and after the second shock (Ml Combining double low line 5.4) on February 6, 2017, seismic storm continued with the large and small earthquakes. ...Daha fazlası

Konferans Nesnesi 2019 International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives42 ( 2/W13 ) , pp. 1 - 1911 679 Görüntülenme

Influence of temporal baseline on the vertical absolute accuracies of TSX HS interferometric DSMS: Case study on Berlin

Sefercik U.G. | Soergel U.

In recent years, interferometric sytnthetic aperture radar (InSAR) is one of the most preferred techniques to generate digital surface models (DSM) which are the three dimensional (3D) digital cartographic representations of earth surface including all terrain and non-terrain formations. Interferometric DSM generation using synthetic aperture radar (SAR) imagery is not an easy process and the vertical absolute accuracy of the final product depends on various parameters. In this study, we aimed to demonstrate the influence of temporal baseline between SAR image-pairs on the vertical absolute ac ...Daha fazlası

Konferans Nesnesi 2014 International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives40 ( 7 ) , pp. 1 - 160 515 Görüntülenme

An application of roll-invariant polarimetric features for crop classification from multi-temporal RADARSAT-2 SAR data

Ustuner M. | Sanli F.B. | Abdikan S. | Esetlili M.T. | Bilgin G.

Crops are dynamically changing and time-critical in the growing season and therefore multitemporal earth observation data are needed for spatio-temporal monitoring of the crops. This study evaluates the impacts of classical roll-invariant polarimetric features such as entropy (H), anisotropy (A), mean alpha angle (?¯) and total scattering power (SPAN) for the crop classification from multitemporal polarimetric SAR data. For this purpose, five different data set were generated as following: (1) H?¯, (2) H?¯Span, (3) H?¯A, (4) H?¯ASpan and (5) coherency [T] matrix. A time-series of four PolSAR d ...Daha fazlası

Konferans Nesnesi 2018 International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives42 ( 1 ) , pp. 4 - 456 694 Görüntülenme

Recent Sea level changes in the Black Sea from satellite gravity and altimeter mesurements

Avsar N.B. | Jin S. | Kutoglu S.H.

Sea level rise causes devastating effects on coastal habitats. For example, coastal erosion and saltwater intrusion are major threats for the Black Sea coasts. So, determining sea level changes in the Black Sea is important in terms of coastal risk assessment and coastal planning. In this study, present-day sea level change in the Black Sea is estimated from satellite altimetry and gravity measurements. Altimetry data demonstrate that the Black Sea level has risen at an average rate of 2.5 ± 0.5 mm/year from January 1993 to May 2017. During this period, inter-annual variability of the non-seas ...Daha fazlası

Konferans Nesnesi 2018 International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives42 ( 3W4 ) , pp. 8 - 85 593 Görüntülenme

Spatial and temporal GIS analysis of change detection using IKONOS images: A case study of Zonguldak

Alkan M. | Oruç M. | Kayabaşi D. | Uga S.

Nowadays, remotely sensed images are used for various purposes in different applications. One of them is the change detection using high resolution satellite imagery which is city areas. Urbanization rapid land use and land cover change has taken place in many cities of Turkey as well as in the world in the last 50 years. In this context, comparison of extraction results from these images and existing vector data is the most important issue. The goal here is to show the advantages and disadvantages of the two IKONOS images for creating road and building database and also updating to the databa ...Daha fazlası

Konferans Nesnesi 2015 International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives38 ( 1W17 ) 524 Görüntülenme

Spatial and temporal analysis of forest covers change: Human impacts and natural disturbances in Bartin Forests, NW of Turkey

Atesoglu A. | Tunay M. | Buyuksalih G.

During last two decades, Bartin Forests in northwest of Turkey have been exploited by human impacts. Easy access and the abundance of valuable and large diversity forest products have led to higher population densities with opening new settlement areas via deforestation activities. In this study, interpretation of digital image classification resulted from multi-date Landsat-5 TM images recorded in time frame between 1992s and 2000s was evaluated to produce land cover maps for change detection analysis. The accuracy of the Landsat TM classification and errors inherent to the techniques used we ...Daha fazlası

Konferans Nesnesi 2004 International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives35 536 Görüntülenme

Radiometric and geometric characteristics of pleiades images

Jacobsen K. | Topan H. | Cam A. | Özendi M. | Oruc M.

Pleiades images are distributed with 50cm ground sampling distance (GSD) even if the physical resolution for nadir images is just 70cm. By theory this should influence the effective GSD determined by means of point spread function at image edges. Nevertheless by edge enhancement the effective GSD can be improved, but this should cause enlarged image noise. Again image noise can be reduced by image restoration. Finally even optimized image restoration cannot improve the image information from 70cm to 50cm without loss of details, requiring a comparison of Pleiades image details with other very ...Daha fazlası

Konferans Nesnesi 2014 International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives40 ( 1 ) , pp. 1 - 177 697 Görüntülenme

Filtreler

Koleksiyon [3]

İlgili Araştırmacılar [4]

Tam Metin [1]

Yazar [56]

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Yayıncı [1]

Konu Başlıkları [90]