ISPRS International Journal of Geo-Information

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Uncovering Spatio-Temporal Cluster Patterns Using Massive Floating Car Data
ISPRS International Journal of Geo-Information - Tập 2 Số 2 - Trang 371-384
Xintao Liu, Yifang Ban
In this paper, we explore spatio-temporal clusters using massive floating car data from a complex network perspective. We analyzed over 85 million taxicab GPS points (floating car data) collected in Wuhan, Hubei, China. Low-speed and stop points were selected to generate spatio-temporal clusters, which indicated the typical stop-and-go movement pattern in real-world traffic congestion. We ...... hiện toàn bộ
Inferring Directed Road Networks from GPS Traces by Track Alignment
ISPRS International Journal of Geo-Information - Tập 4 Số 4 - Trang 2446-2471
Xingzhe Xie, Kevin Bing-YungWong, Hamid Aghajan, Peter Veelaert, Wilfried Philips
This paper proposes a method to infer road networks from GPS traces. These networks include intersections between roads, the connectivity between the intersections and the possible traffic directions between directly-connected intersections. These intersections are localized by detecting and clustering turning points, which are locations where the moving direction changes on GPS traces. We...... hiện toàn bộ
Multifractal Characteristics Analysis Based on Slope Distribution Probability in the Yellow River Basin, China
ISPRS International Journal of Geo-Information - Tập 10 Số 5 - Trang 337
Zilong Qin, Jinxin Wang, Yan Lu
Multifractal theory provides a reliable method for the scientific quantification of the geomorphological features of basins. However, most of the existing research has investigated small and medium-sized basins rather than complex and large basins. In this study, the Yellow River Basin and its sub-basins were selected as the research areas, and the generalized fractal dimension and multifr...... hiện toàn bộ
Multi-Temporal Image Analysis for Fluvial Morphological Characterization with Application to Albanian Rivers
ISPRS International Journal of Geo-Information - Tập 7 Số 8 - Trang 314
Daniele Spada, Paolo Molinari, Walter Bertoldi, Alfonso Vitti, Guido Zolezzi
A procedure for the characterization of the temporal evolution of river morphology is presented. Wet and active river channels are obtained from the processing of imagery datasets. Information about channel widths and active channel surface subdivision in water, vegetation and gravel coverage classes are evaluated along with channel centerline lengths and sinuosity indices. The analysis is...... hiện toàn bộ
Analysis of OpenStreetMap Data Quality at Different Stages of a Participatory Mapping Process: Evidence from Slums in Africa and Asia
ISPRS International Journal of Geo-Information - Tập 10 Số 4 - Trang 265
Godwin Yeboah, João Porto de Albuquerque, Rafael Troilo, Grant Tregonning, Shanaka Perera, Syed Masroor Ahmed, Motunrayo Ajisola, Ornob Alam, Navneet Aujla, Iqbal Azam, Kehkashan Azeem, Pauline Bakibinga, Yen‐Fu Chen, Nazratun Nayeem Choudhury, Peter J. Diggle, Olufunke Fayehun, Paramjit Gill, Frances Griffiths, Bronwyn Harris, Caroline Kabaria, Abdhalah Ziraba, Afreen Zaman Khan, Peter Kibe, Lyagamula Kisia, Catherine Kyobutungi, Richard Lilford, Jason Madan, Nelson Mbaya, Blessing Mberu, Shukri F. Mohamed, Helen Muir, Ahsana Nazish, Anne Njeri, Oladoyin Odubanjo, Akinyinka Omigbodun, Mary E. Osuh, Eme Owoaje, Oyinlola Oyebode, Omar Rahman, Narjis Rizvi, Jo Sartori, Olalekan John Taiwo, Philipp Ulbrich, Olalekan A Uthman, Sam Watson, Ria Wilson, Rita Yusuf
This paper examines OpenStreetMap data quality at different stages of a participatory mapping process in seven slums in Africa and Asia. Data were drawn from an OpenStreetMap-based participatory mapping process developed as part of a research project focusing on understanding inequalities in healthcare access of slum residents in the Global South. Descriptive statistics and qualitative ana...... hiện toàn bộ
Parameters Derived from and/or Used with Digital Elevation Models (DEMs) for Landslide Susceptibility Mapping and Landslide Risk Assessment: A Review
ISPRS International Journal of Geo-Information - Tập 8 Số 12 - Trang 545
Nayyer Saleem, Md. Enamul Huq, Nana Yaw Danquah Twumasi, Akib Javed, Asif Sajjad
Digital elevation models (DEMs) are considered an imperative tool for many 3D visualization applications; however, for applications related to topography, they are exploited mostly as a basic source of information. In the study of landslide susceptibility mapping, parameters or landslide conditioning factors are deduced from the information related to DEMs, especially elevation. In this pa...... hiện toàn bộ
Mapping Submerged Aquatic Vegetation along the Central Vietnamese Coast Using Multi-Source Remote Sensing
ISPRS International Journal of Geo-Information - Tập 9 Số 6 - Trang 395
Tran Ngoc Khanh Ni, Hoàng Công Tín, Vo Trong Thach, Cédric Jamet
Submerged aquatic vegetation (SAV) in the Khanh Hoa (Vietnam) coastal area plays an important role in coastal communities and the marine ecosystem. However, SAV distribution varies widely, in terms of depth and substrate types, making it difficult to monitor using in-situ measurement. Remote sensing can help address this issue. High spatial resolution satellites, with more bands and higher...... hiện toàn bộ
Evaluation of Empirical and Machine Learning Algorithms for Estimation of Coastal Water Quality Parameters
ISPRS International Journal of Geo-Information - Tập 6 Số 11 - Trang 360
Majid Nazeer, Muhammad Bilal, Mohammad Alsahli, Muhammad Imran Shahzad, Ahmad Waqas
Coastal waters are one of the most vulnerable resources that require effective monitoring programs. One of the key factors for effective coastal monitoring is the use of remote sensing technologies that significantly capture the spatiotemporal variability of coastal waters. Optical properties of coastal waters are strongly linked to components, such as colored dissolved organic matter (CDO...... hiện toàn bộ
A SMAP Supervised Classification of Landsat Images for Urban Sprawl Evaluation
ISPRS International Journal of Geo-Information - Tập 5 Số 7 - Trang 109
Flavia Di Palma, Federico Amato, Gabriele Nolè, Federico Martellozzo, Beniamino Murgante
The negative impacts of land take on natural components and economic resources affect planning choices and territorial policies. The importance of land take monitoring, in Italy, has been only recently considered, but despite this awareness, in the great part of the country, effective monitoring and containment measures have not been started, yet. This research proposes a methodology to ma...... hiện toàn bộ
Block2vec: An Approach for Identifying Urban Functional Regions by Integrating Sentence Embedding Model and Points of Interest
ISPRS International Journal of Geo-Information - Tập 10 Số 5 - Trang 339
Zhihao Sun, Hongzan Jiao, Hao Wu, Zhenghong Peng, Lingbo Liu
Urban functional regions are essential information in parsing urban spatial structure. The rapid and accurate identification of urban functional regions is important for improving urban planning and management. Thanks to its low cost and fast data update characteristics, the Point of Interest (POI) is one of the most common types of open access data. It mainly identifies urban functional r...... hiện toàn bộ
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