1,721,409 research outputs found
Quality specification and control of a point cloud from a TLS survey using ISO 19157 standard
Get PDFFrancisco J. Ariza-López, Juan F. Reinoso-Gordo, José L. García-Balboa, Íñigo A. Ariza-López,
Quality specification and control of a point cloud from a TLS survey using ISO 19157 standard,
Automation in Construction (0926-5805), 2022, Volume 140:104353, https://doi.org/10.1016/j.autcon.2022.104353.This paper presents an application of the ISO 19157 framework to the case of a point cloud (PC) representing a heritage asset whose purpose is to serve specific use cases that could be managed in a building information modeling (BIM) environment. The main contribution of this study is to clarify the relationships between the different parts of the ISO 19157 framework applied to heritage building information modeling (HBIM) products derived from terrestrial laser scanner (TLS) surveys by means of a running example. This paper presents a proposal to evaluate, control and report on the quality of the TLS survey of the Ariza Bridge (a 16th century construction). In order to achieve this objective the data quality specifications that must be met are defined by describing and identifying the requirements of five use cases of the data product: 3D visualization, location transfer, measurement, plane generation and absolute positioning. The specifications, according to ISO 19157, are formalized by selecting the data quality element to be measured, its scope, the measure used and the level of conformity necessary for the element to be accepted. In addition, the control methods for each quality element are proposed.Universidad de Jaén / CBUA (open access charge), Regional Government of Andalucía (grant no. PAIDI-TEP-164) and Universidad de Jaén (grant no. TEP164_2021, POAIUJA 21-22)
Quality specification and control of a point cloud from a TLS survey using ISO 19157 standard
Get PDFThis paper presents an application of the ISO 19157 framework to the case of a point cloud (PC) representing a
heritage asset whose purpose is to serve specific use cases that could be managed in a building information
modeling (BIM) environment. The main contribution of this study is to clarify the relationships between the
different parts of the ISO 19157 framework applied to heritage building information modeling (HBIM) products
derived from terrestrial laser scanner (TLS) surveys by means of a running example. This paper presents a
proposal to evaluate, control and report on the quality of the TLS survey of the Ariza Bridge (a 16th century
construction). In order to achieve this objective the data quality specifications that must be met are defined by
describing and identifying the requirements of five use cases of the data product: 3D visualization, location
transfer, measurement, plane generation and absolute positioning. The specifications, according to ISO 19157,
are formalized by selecting the data quality element to be measured, its scope, the measure used and the level of
conformity necessary for the element to be accepted. In addition, the control methods for each quality element
are proposed.Junta de Andalucia PAIDI-TEP-164Universidad de Jae?n POAIUJA 21-22
Universidad de Jaen / CBUA
Universidad de Jaen PAIDI-TEP-164
POAIUJA 21-22
TEP164_202
Quality specification and control of a point cloud from a TLS survey using ISO 19157 standard
No full textThis paper presents an application of the ISO 19157 framework to the case of a point cloud (PC) representing a heritage asset whose purpose is to serve specific use cases that could be managed in a building information modeling (BIM) environment. The main contribution of this study is to clarify the relationships between the different parts of the ISO 19157 framework applied to heritage building information modeling (HBIM) products derived from terrestrial laser scanner (TLS) surveys by means of a running example. This paper presents a proposal to evaluate, control and report on the quality of the TLS survey of the Ariza Bridge (a 16th century construction). In order to achieve this objective the data quality specifications that must be met are defined by describing and identifying the requirements of five use cases of the data product: 3D visualization, location transfer, measurement, plane generation and absolute positioning. The specifications, according to ISO 19157, are formalized by selecting the data quality element to be measured, its scope, the measure used and the level of conformity necessary for the element to be accepted. In addition, the control methods for each quality element are proposed
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Geospatial data quality (ISO 19157-1) : evolve or perish
Get PDFGiven the circumstance that the process for the revision of the international standard ISO 19157 is currently open, this article presents a critical reflection on its content, application and some challenges posed by the new types of data (e.g. big data, BIM data, etc.), that also have a geospatial component and to which, therefore, this international standard can be applied as well. Proposals are put forward going along three lines of improvement, on the one hand the consideration of new data quality elements and on the other, the reinforcement of the interoperability of this international standard with other standards related to data quality, and finally various improvements (e.g. standardization of evaluation methods, clearly introducing the life cycle, improvement of the definition of metaquality, etc.) of the standard, which come from experience.Dado que actualmente está abierto el proceso de revisión de la norma internacional ISO 19157-1, este artículo presenta una reflexión crítica sobre su contenido, aplicación y algunos desafíos planteados por los nuevos tipos de datos (p.ej. big data, datos BIM, etc.), que también tienen un componente geoespacial y los que, por tanto, esta norma internacional también podría aplicarse. Las propuestas se presentan siguiendo tres líneas, por un lado, la consideración de nuevos elementos de calidad de datos, por otro, el refuerzo de la interoperabilidad de este estándar internacional con otros estándares relacionados con la calidad de datos y, finalmente, varias mejoras más específicas que se basan en la experiencia (p.ej. estandarización de métodos de evaluación, introducción del ciclo de vida del producto de datos, mejora de la definición de la metacalidad, etc.)
Pengukuran Kualitas Sistem Informasi Geografis dengan Metode WEBQUAL 4.0, ISO 25010, dan ISO 19157
No full textSistem Informasi Geografis (SIG) memiliki peran penting dalam mendukung pengambilan keputusan di berbagai sektor, seperti perencanaan kota, logistik, dan manajemen lingkungan. Namun, kualitas SIG yang buruk dapat mengakibatkan kesalahan dalam penetapan kebijakan akibat data yang tidak akurat, tidak lengkap, atau usang. Evaluasi kualitas SIG saat ini masih sering bersifat subjektif dan tidak konsisten karena kurangnya pendekatan terstandar. Untuk mengatasi hal tersebut, diperlukan kerangka evaluasi terpadu yang mencakup aspek kualitas perangkat lunak, kualitas data geospasial, dan pengalaman pengguna.
Permasalahan utama dalam penelitian ini adalah belum adanya pendekatan evaluasi kualitas SIG yang mengintegrasikan metode WebQual 4.0, ISO 25010, dan ISO 19157 secara bersamaan. WebQual 4.0 berfokus pada persepsi pengguna terhadap kualitas layanan, ISO 25010 mengukur karakteristik teknis perangkat lunak, sedangkan ISO 19157 menilai kualitas data geospasial. Kurangnya integrasi ketiga standar tersebut mengakibatkan penilaian yang tidak menyeluruh terhadap kualitas SIG. Penelitian ini bertujuan untuk mengembangkan kerangka kerja evaluasi kualitas SIG yang terintegrasi dari ketiga metode tersebut. Metodologi yang digunakan meliputi studi literatur, penyusunan kuesioner berbasis dimensi WebQual 4.0, ISO 25010, dan ISO 19157, serta pengumpulan data dari pengguna situs Bali Satu Data. Validitas dan reliabilitas instrumen diuji, diikuti dengan analisis statistik menggunakan metode Analytical Hierarchy Process (AHP), Importance Performance Analysis (IPA), dan uji T-Test. Hasil dari penelitian ini diharapkan dapat menghasilkan matriks kualitas terpadu sebagai panduan praktis bagi pengembang dan pemangku kepentingan dalam meningkatkan kualitas SIG secara menyeluruh.
=================================================================================================================================
Geographic Information Systems (GIS) play an important role in supporting decision-making in various sectors, such as urban planning, logistics, and environmental management. However, poor GIS quality can lead to errors in policy-making due to inaccurate, incomplete, or outdated data. GIS quality evaluation is currently often subjective and inconsistent due to the lack of a standardized approach. To address this issue, an integrated evaluation framework is needed that covers aspects of software quality, geospatial data quality, and user experience. The main problem in this study is the absence of a GIS quality evaluation approach that integrates the WebQual 4.0, ISO 25010, and ISO 19157 methods simultaneously. WebQual 4.0 focuses on user perceptions of service quality, ISO 25010 measures the technical characteristics of software, while ISO 19157 assesses the quality of geospatial data. The lack of integration of these three standards results in an incomplete assessment of GIS quality. This study aims to develop an integrated GIS quality evaluation framework from these three methods. The methodology used includes literature review, questionnaire development based on the dimensions of WebQual 4.0, ISO 25010, and ISO 19157, and data collection from users of the Bali Satu Data website. The validity and reliability of the instrument were tested, followed by statistical analysis using the Analytical Hierarchy Process (AHP), Importance Performance Analysis (IPA), and T-Test methods. The results of this study are expected to produce an integrated quality matrix as a practical guide for developers and stakeholders in improving GIS quality comprehensively
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
- …
