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Open-source geospatial tools and technologies for urban and environmental studies Open Geospatial data softw. stand. Pub Date : 2020-12-01 Amin Mobasheri, Francesco Pirotti, Giorgio Agugiaro
Open geospatial data and tools are an increasingly important paradigm offering the opportunity to promote the democratization of geographical information, the transparency of governments and institutions, as well as social, economic and environmental opportunities. During the past decade, developments in the area of open geospatial data and open-source geospatial software have greatly improved. Many
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A new tool for the remote sensing of groundwater tables: satellite images of pastoral wells Open Geospatial data softw. stand. Pub Date : 2020-09-30 Bernard Collignon
In the Sahara and the Sahel, groundwater is a limited and indispensable resource for pastoral livestock farming. The daily life and work of the herders are organised around the location of the wells and the depth of the water table. To ensure the sustainable development of these regions, it is therefore essential to develop accurate piezometric maps, even in the areas that are most difficult to access
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GeomDiff — an algorithm for differential geospatial vector data comparison Open Geospatial data softw. stand. Pub Date : 2020-07-10 Atle Frenvik Sveen
Diffs, a concept known from source code version control systems such as git, is interesting for geospatial, event-based workflows. We investigate how the native mathematical structure of vector geometries can be utilized in order to create a diffing algorithm tailored to geospatial vector data. Diffing algorithms are a well-researched area which dates to the 1970ies; however, we find that geospatial
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Personalized accessible wayfinding for people with disabilities through standards and open geospatial platforms in smart cities Open Geospatial data softw. stand. Pub Date : 2020-06-16 Bradley Wheeler, Meirman Syzdykbayev, Hassan A. Karimi, Raanan Gurewitsch, Yanbo Wang
Of the many features that smart cities offer, safe and comfortable mobility of pedestrians within the built environment is of particular importance. Safe and comfortable mobility requires that the built environments of smart cities be accessible to all pedestrians, mobility abled and mobility impaired, given their various mobility needs and preferences. This, coupled with advanced technologies such
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Geospatial openness: from software to standards & data Open Geospatial data softw. stand. Pub Date : 2020-01-30 Marco Minghini, Amin Mobasheri, Victoria Rautenbach, Maria Antonia Brovelli
This paper is the editorial of the Special Issue “Open Source Geospatial Software”, which features 10 published papers. The editorial introduces the concept of openness and, within the geospatial context, declines it into the three main components of software, data and standards. According to this classification, the papers published in the Special Issue are briefly summarized and a future research
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Open software and standards in the realm of laser scanning technology Open Geospatial data softw. stand. Pub Date : 2019-11-21 Francesco Pirotti
This review aims at introducing laser scanning technology and providing an overview of the contribution of open source projects for supporting the utilization and analysis of laser scanning data. Lidar technology is pushing to new frontiers in mapping and surveying topographic data. The open source community has supported this by providing libraries, standards, interfaces, modules all the way to full
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PyWPS: overview, new features in version 4 and existing implementations Open Geospatial data softw. stand. Pub Date : 2019-11-01 Luís Moreira de Sousa, Jorge Mendes de Jesus, Jachym Čepicky, Athanasios Tom Kralidis, David Huard, Carsten Ehbrecht, Suzana Barreto, Jonas Eberle
PyWPS 4 is a re–make of the Python implementation of the WPS standard. It is the result of the work of over a dozen individual contributors, during a period of almost three years. One of the goals driving this re–implementation was to embrace modern Python technologies and the possibilities they open.This technical note reviews some of the more advanced possibilities this new PyWPS implementation opens
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Filling OpenStreetMap data gaps in rural Nepal: a digital youth internship and leadership Programme Open Geospatial data softw. stand. Pub Date : 2019-10-21 Kshitiz Khanal, Nama Raj Budhathoki, Nancy Erbstein
Crowdsourced, open geospatial data such as the data compiled through OpenStreetMap have proven useful in addressing humanitarian, disaster and development needs. However, the existing ways in which volunteers engage in OpenStreetMap have inherent limitations that lead to critical data gaps in economically underdeveloped countries and regions. Various initiatives that target specific geospatial data
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Automatic conversion of OSM data into LULC maps: comparing FOSS4G based approaches towards an enhanced performance Open Geospatial data softw. stand. Pub Date : 2019-10-01 J. Patriarca, C. C. Fonte, J. Estima, J.-P. de Almeida, A. Cardoso
OSM2LULC is a software package developed to automatically convert OpenStreetMap (OSM) data into Land Use Land Cover (LULC) maps using Free and Open Source Software for Geospatial (FOSS4G) tools. It needs to be highly efficient given the increasing detail of OSM data and the need to apply it to large extent regions. In this article, a comparison between the implementation of OSM2LULC in different available
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The indicative meaning calculator – quantification of paleo sea-level relationships by using global wave and tide datasets Open Geospatial data softw. stand. Pub Date : 2019-09-23 Thomas Lorscheid, Alessio Rovere
The study of past sea levels relies largely on the interpretation and quantification of sea-level indicators. These are fossil coastal landforms, bioconstructions or deposits that have a quantifiable relation to paleo sea level (called the indicative meaning) and can be assigned an age of formation. The calculation of the indicative meaning should always rely on the quantitative comparison between
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OpenStreetMap history for intrinsic quality assessment: Is OSM up-to-date? Open Geospatial data softw. stand. Pub Date : 2019-09-09 Marco Minghini, Francesco Frassinelli
OpenStreetMap (OSM) is a well-known crowdsourcing project which aims to create a geospatial database of the whole world. Intrinsic approaches based on the analysis of the history of data, i.e. its evolution over time, have become an established way to assess OSM quality. After a comprehensive review of scientific as well as software applications focused on the visualization, analysis and processing
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Optimized watershed delineation library for server-side and client-side web applications Open Geospatial data softw. stand. Pub Date : 2019-08-26 Muhammed Sit, Yusuf Sermet, Ibrahim Demir
The advancements and new techniques in information technologies are making it possible to acquire large-scale spatial data through satellites, radars and sensor networks. The collection of vast amounts of environmental data increased the demand for applications which can manage and process large-scale and high-resolution data sets in real-time. One of the important tasks for organizing and customizing
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Qualitative study of the incompatibility of indoor map file formats with location software applications Open Geospatial data softw. stand. Pub Date : 2019-08-12 J. Gelernter, Nishith Maheshwari
Indoor maps, and therefore the indoor map data and software that uses them, are used by architects, designers and planners, those in public safety and emergency response, facilities management and even advertising. Presently, the wide range of commonly-used formats for generating indoor maps means that many who would use indoor map applications either must convert indoor map data to another format
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TWI computation: a comparison of different open source GISs Open Geospatial data softw. stand. Pub Date : 2019-07-29 Pietro Mattivi, Francesca Franci, Alessandro Lambertini, Gabriele Bitelli
The opportunities of retrieving geospatial datasets as open data and the reliability of Free and Open Source Software (FOSS) GIS increased the possibilities of performing a large number of geospatial analyses. In particular, the worldwide availability of Digital Elevation Model (DEM) permits to compute several topographic indexes able to characterize the land morphology.In this paper, we evaluate the
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The LandInfra standard and its role in solving the BIM-GIS quagmire Open Geospatial data softw. stand. Pub Date : 2019-07-15 Kavisha Kumar, Anna Labetski, Ken Arroyo Ohori, Hugo Ledoux, Jantien Stoter
LandInfra is a relatively new open standard for modelling and representing land and infrastructure features. As it overlaps with other open standards in BIM (IFC) and 3D GIS (CityGML), it has been recognised as a potential candidate to bridge the gap between the two domains. However, the knowledge of this standard in both communities is low, and there are still no publications which fully explore LandInfra
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CityJSON: a compact and easy-to-use encoding of the CityGML data model Open Geospatial data softw. stand. Pub Date : 2019-06-17 Hugo Ledoux, Ken Arroyo Ohori, Kavisha Kumar, Balázs Dukai, Anna Labetski, Stelios Vitalis
The international standard CityGML is both a data model and an exchange format to store digital 3D models of cities. While the data model is used by several cities, companies, and governments, in this paper we argue that its XML-based exchange format has several drawbacks. These drawbacks mean that it is difficult for developers to implement parsers for CityGML, and that practitioners have, as a consequence
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OSHDB: a framework for spatio-temporal analysis of OpenStreetMap history data Open Geospatial data softw. stand. Pub Date : 2019-04-08 Martin Raifer, Rafael Troilo, Fabian Kowatsch, Michael Auer, Lukas Loos, Sabrina Marx, Katharina Przybill, Sascha Fendrich, Franz-Benjamin Mocnik, Alexander Zipf
OpenStreetMap (OSM) is a collaborative project collecting geographical data of the entire world. The level of detail of OSM data and its data quality vary much across different regions and domains. In order to analyse such variations it is often necessary to research the history and evolution of the OSM data.The OpenStreetMap History Database (OSHDB) is a new data analysis tool for spatio-temporal
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A sustainable process and toolbox for geographical linked data generation and publication: a case study with BTN100 Open Geospatial data softw. stand. Pub Date : 2019-03-13 Paola Espinoza-Arias, Miguel García-Delgado, Oscar Corcho, Pedro Vivas-White, Hugo Potti-Manjavacas
We describe the process and tools that we have used to generate and publish the BTN100 Linked Dataset, based on the original data from the Spanish Topographic Base (1:100.000 scale) from the Spanish Instituto Geográfico Nacional. We have taken into account the limitations and lessons learned from our initial experience on the generation and publication of Linked Data from a range of geographical sources
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INSPIRE coverages: an analysis and some suggestions Open Geospatial data softw. stand. Pub Date : 2019-02-11 Peter Baumann, Jordi Escriu
In its quest for a common European Spatial Data Infrastructure INSPIRE has also addressed the category of spatio-temporally extended coverages, in particular: raster data. The INSPIRE definition of coverages is similar to the OGC and ISO standards, but not identical. This deviation from the common standards disallows using standard off-the-shelf software. Further, as we find some technical peculiarities
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A metadata ADE for CityGML Open Geospatial data softw. stand. Pub Date : 2018-11-30 Anna Labetski, Kavisha Kumar, Hugo Ledoux, Jantien Stoter
While there exist international standards for geospatial metadata (ISO 19115), these are rarely used in practice for 3D datasets, and one of the OGC standards for 3D city models, CityGML, does not offer a mechanism to store metadata in a structured way. Having metadata in CityGML files, which are in practice often very large and complex, would provide us with the ability to quickly understand the nature
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The conceptual schema in geospatial data standard design with application to GroundWaterML2 Open Geospatial data softw. stand. Pub Date : 2018-11-23 Boyan Brodaric, Eric Boisvert, Peter Dahlhaus, Sylvain Grellet, Alexander Kmoch, François Létourneau, Jessica Lucido, Bruce Simons, Bernhard Wagner
The explosive growth of geospatial data has stimulated the development of many standards aimed at decreasing data heterogeneity and enhancing data use. Well-established design methods for geospatial data standards typically involve the creation of two schemas for data structure, designated here as logical and physical, but this can lead to conceptual inconsistencies and modelling inefficiencies. In
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Implementation and assessment of two density-based outlier detection methods over large spatial point clouds Open Geospatial data softw. stand. Pub Date : 2018-09-10 Francesco Pirotti, Roberta Ravanelli, Francesca Fissore, Andrea Masiero
Several technologies provide datasets consisting of a large number of spatial points, commonly referred to as point-clouds. These point datasets provide spatial information regarding the phenomenon that is to be investigated, adding value through knowledge of forms and spatial relationships. Accurate methods for automatic outlier detection is a key step. In this note we use a completely open-source
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CityGML Application Domain Extension (ADE): overview of developments Open Geospatial data softw. stand. Pub Date : 2018-08-27 Filip Biljecki, Kavisha Kumar, Claus Nagel
The Application Domain Extension (ADE) is a built-in mechanism of CityGML to augment its data model with additional concepts required by particular use cases. The goal of this paper is to provide an overview of the ADE mechanism and a literature review of developments since its introduction a decade ago. The discovery of publications found that currently there are 44 ADEs supporting a wide range of
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Spatial and temporal resolution of geographic information: an observation-based theory Open Geospatial data softw. stand. Pub Date : 2018-08-13 Auriol Degbelo, Werner Kuhn
After a review of previous work on resolution in geographic information science (GIScience), this article presents a theory of spatial and temporal resolution of sensor observations. Resolution of single observations is computed based on the characteristics of the receptors involved in the observation process, and resolution of observation collections is assessed based on the portion of the study area
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Eliciting academic SDI requirements through a survey of user practices Open Geospatial data softw. stand. Pub Date : 2018-07-16 Eduardo Silverio da Silva, Silvana Philippi Camboim
During coursework and research projects, several geospatial algorithms are produced and mentioned by authors in written documents. However, these products often remain unavailable after the end of the projects but could be reused by third parties, providing an improvement in spatial data infrastructure (SDI), reproducibility and open science. Because SDI relies on the sharing of geographic resources
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Distributed Context Tree Weighting (CTW) for route prediction Open Geospatial data softw. stand. Pub Date : 2018-07-02 Vishnu Shankar Tiwari, Arti Arya
Route prediction play a vital role in many important location-based applications like resource prediction in grid computing, traffic congestion estimation, vehicular ad-hoc networks, travel recommendation etc. The goal of this work is to design scalable route prediction application based on Context Tree Weighting (CTW) modeling of user travel data. CTW is one of the widely used technique for text compression
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OpenLitterMap.com – Open Data on Plastic Pollution with Blockchain Rewards (Littercoin) Open Geospatial data softw. stand. Pub Date : 2018-06-25 Seán Lynch
OpenLitterMap rewards users with Littercoin for producing open data on litter. Open data on the geospatial characteristics of litter provide means of invoking and evaluating responses to plastic pollution. OpenLitterMap currently works as a web app on all devices with native mobile apps in development. The stack includes the integration of the Laravel PHP Framework on the backend; Vue for frontend
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ThemeRise: a theme-oriented framework for volunteered geographic information applications Open Geospatial data softw. stand. Pub Date : 2018-06-18 Michele B. Pinheiro, Clodoveu A. Davis
MotivationWeb 2.0 disseminated the possibility of engaging citizens in data collection initiatives, also known as Volunteered Geographic Information (VGI), a type of crowdsourcing. This project was conceived based on the need to quickly develop and publish geographic data collection tools and resources that could be customized to any relevant theme and engage as many contributors as possible.ImplementationThemeRise
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Hypermap registry: an open source, standards-based geospatial registry and search platform Open Geospatial data softw. stand. Pub Date : 2018-06-11 Paolo Corti, Benjamin Lewis, Athanasios Tom Kralidis
On the web there is a large number of useful geospatial datasets available, exposed via web map services using open standards or open protocols. Just as web search engines enable users to reliably search and find relevant documents, a similar capability is needed to return the most useful and reliable geospatial datasets.Hypermap Registry is an open source platform, developed by the Center for Geographic
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Open source data mining infrastructure for exploring and analysing OpenStreetMap Open Geospatial data softw. stand. Pub Date : 2018-05-28 Franz-Benjamin Mocnik, Amin Mobasheri, Alexander Zipf
OpenStreetMap and other Volunteered Geographic Information datasets have been explored in the last years, with the aim of understanding how their meaning is rendered, of assessing their quality, and of understanding the community-driven process that creates and maintains the data. Research mostly focuses either on the data themselves while ignoring the social processes behind, or solely discusses the
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3DCityDB - a 3D geodatabase solution for the management, analysis, and visualization of semantic 3D city models based on CityGML Open Geospatial data softw. stand. Pub Date : 2018-05-14 Zhihang Yao, Claus Nagel, Felix Kunde, György Hudra, Philipp Willkomm, Andreas Donaubauer, Thomas Adolphi, Thomas H. Kolbe
Over the last decade, more and more cities and even countries worldwide are creating semantic 3D city models of their physical environment based on the international CityGML standard issued by the Open Geospatial Consortium (OGC). CityGML is an open data model and XML-based data exchange format describing the most relevant urban and landscape objects along with their spatial and non-spatial attributes
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Preface to the special issue “Geospatial Sensor Web - Concepts, Technologies and Applications” Open Geospatial data softw. stand. Pub Date : 2018-04-09 Simon Jirka, Christoph Stasch
Since the adoption of the first Sensor Web standards in 2007, the number of Sensor Web applications has constantly increased. Implementations in domains such as hydrology [1], ocean sciences [2], or air quality monitoring [3] demonstrate the broad applicability and practical value of Sensor Web components. Over the last 10 years, a significant evolution of the underlying concepts was achieved. Between
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Promoting the capture of sensor data provenance: a role-based approach to enable data quality assessment, sensor management and interoperability Open Geospatial data softw. stand. Pub Date : 2018-04-02 Janet Fredericks, Mike Botts
Sensor technologies and capabilities have an effect on observational data quality. Typically, data management begins, at best, when a data manager obtains the data and needs to describe it sufficiently to data consumers. Often, the sensing methods are not adequately described and the data manager does not know the appropriate questions to ask or where to direct questions about sensors, their configuration
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The Energy Application Domain Extension for CityGML: enhancing interoperability for urban energy simulations Open Geospatial data softw. stand. Pub Date : 2018-03-05 Giorgio Agugiaro, Joachim Benner, Piergiorgio Cipriano, Romain Nouvel
The road towards achievement of the climate protection goals requires, among the rest, a thorough rethinking of the energy planning tools (and policies) at all levels, from local to global. Nevertheless, it is in the cities where the largest part of energy is produced and consumed, and therefore it makes sense to focus the attention particularly on the cities as they yield great potentials in terms
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val3dity: validation of 3D GIS primitives according to the international standards Open Geospatial data softw. stand. Pub Date : 2018-02-23 Hugo Ledoux
The validity of 3D primitives in 3D GIS datasets is often a prerequisite for using them in simulation and decision-making software, e.g. visibility analysis, noise pollution assessment, and energy estimation. However, while agreed definitions exist (in the international standard ISO19107), most software vendors ignore them and implement simpler 3D primitives, for instance by excluding interior boundaries
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Wheelmap: the wheelchair accessibility crowdsourcing platform Open Geospatial data softw. stand. Pub Date : 2017-11-29 Amin Mobasheri, Jonas Deister, Holger Dieterich
Crowdsourcing (geo-) information and participatory GIS are among the current hot topics in research and industry. Various projects are implementing participatory sensing concepts within their workflow in order to benefit from the power of volunteers, and improve their product quality and efficiency. Wheelmap is a crowdsourcing platform where volunteers contribute information about wheelchair-accessible
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Preface to the special issue “Open Science for earth remote sensing: latest developments in software and data” Open Geospatial data softw. stand. Pub Date : 2017-10-25 Francesco Pirotti, Markus Neteler, Duccio Rocchini
Open source (OS) has gone a long way since it started evolving as an alternative solution that uses communitybased development backed by research institutions and companies. Today numerous OS software for processing geospatial data are available and widely used. The “open” paradigm has spread also to standards and data, which are now often available as open data (OD) [1]. Another characteristic of
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Construction of smooth daily remote sensing time series data: a higher spatiotemporal resolution perspective Open Geospatial data softw. stand. Pub Date : 2017-10-05 Zhuokun Pan, Yueming Hu, Bin Cao
Research in time-series remote sensing data is receiving increasing attention. With the availability of relatively short repeat cycle and high spatial resolution satellite data, the construction and application of high spatiotemporal remote sensing time-series data is promising. In this paper, we proposed a method to construct complete spatial time series data, with Savitzky-Golay filter for smoothing
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Big data and sustainable cities: applications of new and emerging forms of geospatial data in urban studies Open Geospatial data softw. stand. Pub Date : 2017-09-25 Yeran Sun, Yunyan Du
Introduction With the development of Information and Communications Technology (ICT), new forms of geospatial data are emerging in recent years. Among the new and emerging forms of geospatial data, volunteered geographic information (or crowdsourced geographic information) and geosocial networking data are gaining much interest [1–4]. Sources of volunteered geographic information (VGI) include collaborative
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The VI-Suite: a set of environmental analysis tools with geospatial data applications Open Geospatial data softw. stand. Pub Date : 2017-09-14 Ryan Southall, Filip Biljecki
BackgroundThe VI-Suite is a free and open-source addon for the 3D content creation application Blender, developed primarily as a tool for the contextual and performative analysis of buildings. Its functionality has grown from simple, static lighting analysis to fully parametric lighting, shadowing, and building energy analyses. It adopts a flexible, mesh geometry based approach to the specification
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From heterogeneous marine sensors to sensor web: (near) real-time open data access adopting OGC sensor web enablement standards Open Geospatial data softw. stand. Pub Date : 2017-09-04 Elena Partescano, Alberto Brosich, Marina Lipizer, Vanessa Cardin, Alessandra Giorgetti
Sensor engineering is continuously evolving as devices become cheaper, smaller, more intelligent, and more efficient. Today, oceanographic sensors aim at monitoring marine processes by means of physical, chemical, and biological variables, and use different data formats, units, parameters, resolutions, data quality standards, and protocols. Therefore, integration and interoperability at European level
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Remote sensing of burned areas via PCA, Part 2: SVD-based PCA using MODIS and Landsat data Open Geospatial data softw. stand. Pub Date : 2017-08-24 Nikos Alexandris, Nikos Koutsias, Sandeep Gupta
BackgroundSingular value decomposition (SVD), as an alternative solution to principal components analysis (PCA), may enhance the spectral profile of burned areas in satellite image composites.MethodsIn this regard, we combine the pre-processing options of centering, non-centering, scaling, and non-scaling the input multi-spectral data, prior to the matrix decomposition, and treat their combinations
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Geospatial binding for transdisciplinary research in crop science: the GRASPgfs initiative Open Geospatial data softw. stand. Pub Date : 2017-08-14 Didier G. Leibovici, Suchith Anand, Roberto Santos, Sean Mayes, Rumiana Ray, Masoud Al-Azri, Abdul Baten, Graham King, Asha S. Karunaratne, Sayed Azam-Ali, Mike J. Jackson
The paper retraces the GRASPgfs endeavor (Geospatial Resource for Agricultural Species and Pests with integrated workflow modelling to support Global Food Security) between multiple disciplines around a common objective of facilitating research and model simulations for sustainable food security. Within this endeavor, the geospatial media has been the enabler for multidisciplinary research in crop
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The new OGC Publish/Subscribe Standard - applications in the Sensor Web and the Aviation domain Open Geospatial data softw. stand. Pub Date : 2017-08-03 Lorenzo Bigagli, Matthes Rieke
The Open Geospatial Consortium (OGC) has conducted much work in the past on event-based models and architectures. However, the current OGC standard baseline only supports synchronous web service capabilities, which have insofar primarily addressed the request/reply model, where a client makes a request and the server usually responds synchronously, with either the requested information or a failure
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Automated design of gradual zone systems Open Geospatial data softw. stand. Pub Date : 2017-07-24 Joseph Molloy, Rolf Moeckel
BackgroundThe appropriate resolution of a zone system is key to the development of any transport model, as well as other spatial analyses. The number and shape of zones directly impacts the effectiveness of any further modeling steps, with the trade-off between computation time and model accuracy being a particularly important consideration. Currently, zone systems are often designed by hand. The gradual
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Remote sensing of burned areas via PCA, Part 1; centering, scaling and EVD vs SVD Open Geospatial data softw. stand. Pub Date : 2017-07-13 Nikos Alexandris, Sandeep Gupta, Nikos Koutsias
BackgroundPrincipal components analysis (PCA) is based conventially on the eigenvector decomposition (EVD). Mean-centering the input data prior to the eigenanalysis is treated as an integral part of the algorithm. It ensures that the first principal component is proportional to the maximum variance of the input data. Equivalent to EVD, but numerically more robust, is the singular value decomposition
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Open source R for applying machine learning to RPAS remote sensing images Open Geospatial data softw. stand. Pub Date : 2017-07-03 Marco Piragnolo, Andrea Masiero, Francesco Pirotti
The increase in the number of remote sensing platforms, ranging from satellites to close-range Remotely Piloted Aircraft System (RPAS), is leading to a growing demand for new image processing and classification tools. This article presents a comparison of the Random Forest (RF) and Support Vector Machine (SVM) machine-learning algorithms for extracting land-use classes in RPAS-derived orthomosaic using
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Orfeo ToolBox: open source processing of remote sensing images Open Geospatial data softw. stand. Pub Date : 2017-06-29 Manuel Grizonnet, Julien Michel, Victor Poughon, Jordi Inglada, Mickaël Savinaud, Rémi Cresson
Orfeo ToolBox is an open-source project for state-of-the-art remote sensing, including a fast image viewer, applications callable from command-line, Python or QGIS, and a powerful C++ API. This article is an introduction to the Orfeo ToolBox’s flagship features from the point of view of the two communities it brings together: remote sensing and software engineering.
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MicMac – a free, open-source solution for photogrammetry Open Geospatial data softw. stand. Pub Date : 2017-06-05 Ewelina Rupnik, Mehdi Daakir, Marc Pierrot Deseilligny
The publication familiarizes the reader with MicMac - a free, open-source photogrammetric software for 3D reconstruction. A brief history of the tool, its organisation and unique features vis-à-vis other software tools are in the highlight. The essential algorithmic aspects of the structure from motion and image dense matching problems are discussed from the implementation and the user’s viewpoints
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Pilot implementation of the US EPA interoperable watershed network Open Geospatial data softw. stand. Pub Date : 2017-05-24 Tad Slawecki, Dwane Young, Britt Dean, Brandon Bergenroth, Kimberly Sparks
BackgroundThe mission of the United States Environmental Protection Agency (EPA) is to protect human health and the environment, including air, water and land. Understanding the extent of pollution in waters and identifying waters for protection has been based in part on water quality monitoring data collected and shared by parties (federal, state, tribal, and local) throughout the U.S. To date, this
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Improving FOSS photogrammetric workflows for processing large image datasets Open Geospatial data softw. stand. Pub Date : 2017-05-15 Oscar Martinez-Rubi, Francesco Nex, Marc Pierrot-Deseilligny, Ewelina Rupnik
BackgroundIn the last decade Photogrammetry has shown to be a valid alternative to LiDAR techniques for the generation of dense point clouds in many applications. However, dealing with large image sets is computationally demanding. It requires high performance hardware and often long processing times that makes the photogrammetric point cloud generation not suitable for mapping purposes at regional
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Evaluating two freely available geocoding tools for geographical inconsistencies and geocoding errors Open Geospatial data softw. stand. Pub Date : 2017-05-01 Sushant K. Singh
BackgroundGeocoding is highly prone to error for various reasons. This paper examines the geographical inconsistencies associated with geocoding errors seen when using two freely available geocoding tools, Google Sheets and ggmap.MethodsTwo hundred restaurants, all recipients of California’s Center of Excellence award, were selected for the analysis. The geocoded addresses were plotted on maps using
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A combined change detection procedure to study desertification using opensource tools Open Geospatial data softw. stand. Pub Date : 2017-04-24 Anna Zanchetta, Gabriele Bitelli
Background and MethodsThe paper presents a combination of two unsupervised techniques for change detection studies in arid and semi-arid areas. Among Remote Sensing change detection techniques, unsupervised approaches have the advantage of promptly producing a map of the change between two dates, but often the interpretation of the results is not straightforward, and requires further processing of
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Generalized 3D fragmentation index derived from lidar point clouds Open Geospatial data softw. stand. Pub Date : 2017-04-20 Vaclav Petras, Douglas J. Newcomb, Helena Mitasova
BackgroundPoint clouds with increased point densities create new opportunities for analyzing landscape structure in 3D space. Taking advantage of these dense point clouds we have extended a 2D forest fragmentation index developed for regional scale analyses into a 3D index for analyzing vegetation structure at a much finer scale.MethodsBased on the presence or absence of points in a 3D raster (voxel
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GeoJModelBuilder: an open source geoprocessing workflow tool Open Geospatial data softw. stand. Pub Date : 2017-04-10 Mingda Zhang, Xiaoqian Bu, Peng Yue
BackgroundScientific workflows have been commonly used in geospatial data analysis and Cyberinfrastructure. They allow distributed geoprocessing algorithms, models, data, and sensors to be chained together to support geospatial data analysis, and environmental monitoring, and integrated environmental modelling.ResultsThis paper presents an open source geoprocessing workflow tool, GeoJModelBuilder.
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OpenDragon: software and a programmer’s toolkit for teaching remote sensing and geoinformatics Open Geospatial data softw. stand. Pub Date : 2017-03-13 Kurt Rudahl, Sally E. Goldin
BackgroundContinued progress in geoinformatics research and applications depends on educating new generations of theorists and practitioners. Effective education and training in turn depend on the availability of appropriate tools, including software.The OpenDragon Project was established in 2004 to help satisfy this requirement. OpenDragon provides a simple yet powerful platform for hands-on lab exercises
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Fusion of high-resolution DEMs for water flow modeling Open Geospatial data softw. stand. Pub Date : 2017-03-06 Anna Petrasova, Helena Mitasova, Vaclav Petras, Justyna Jeziorska
BackgroundNew technologies for terrain reconstruction have increased the availability of topographic data at a broad range of resolutions and spatial extents. The existing digital elevation models (DEMs) can now be updated at a low cost in selected study areas with newer, often higher resolution data using unmanned aerial systems (UAS) or terrestrial sensors. However, differences in spatial coverage
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Spatial analysis of users-generated ratings of yelp venues Open Geospatial data softw. stand. Pub Date : 2017-03-01 Yeran Sun, Jorge David Gonzalez Paule
BackgroundWith popular location-based services on smart phones, users are willing to leave comments on the business venues (e.g., restaurants, shops, bars, etc.) that they visited. Reviews of users on Yelp venues somewhat indicate satisfaction of customers with services of those venues. Those reviews could be used to reflect service quality of business venues. Geo-localized venues could tell researchers
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An open source virtual globe rendering engine for 3D applications: NASA World Wind Open Geospatial data softw. stand. Pub Date : 2017-02-27 Francesco Pirotti, Maria Antonia Brovelli, Gabriele Prestifilippo, Giorgio Zamboni, Candan Eylul Kilsedar, Marco Piragnolo, Patrick Hogan
BackgroundNASA World Wind is an open source application-programming interface for developing geographic information systems based on a virtual globe rendering engine representing a planet. NASA World Wind provides the ideal environment for scientific data, their analysis, visual representation and interaction with users, in a single platform, which can be deployed both as a Java desktop application
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Geodata interoperability and harmonization in transport: a case study of open transport net Open Geospatial data softw. stand. Pub Date : 2017-02-24 Carina Veeckman, Karel Jedlička, Dieter De Paepe, Dmitrii Kozhukh, Štěpán Kafka, Pieter Colpaert, Otakar Čerba
BackgroundIn Europe, a lot of data portals are emerging on the local, national or interregional levels. These portals have a common objective to share data and information to its citizens and businesses, and to make information more accessible. However, studies showed that people are still facing difficulties in finding and reusing public sector information. To facilitate data reuse, the information