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检索条件"丛书名=Lecture Notes in Geoinformation and Cartography"

共 1042 条记录，以下是11-20 订阅

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Investigating Data Fusion from Three Different Point Cloud Datasets Using Iterative Closest Point (ICP) Registration

Investigating Data Fusion from Three Different Point Cloud D...

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18th International 3D GeoInfo Conference

作者： Mutiarasari, Wahyu Marta Abd Rahman, Muhammad Zulkarnain Rahman, Alias Abdul Univ Teknol Malaysia Dept Geoinformat 3D GIS Res Lab Fac Built Environm & Surveying Johor Baharu Johor Malaysia

ISBN: (纸本)9783031437014;9783031436994;9783031436987

Adataset from a single survey technique, such as terrestrial laser scanning, hardly generates a complete 3D model. Therefore, data fusion is usually used to integrate various data to overcome the technique limitations. For multisource point cloud data, Iterative Closest Point (ICP) registration can be used to combine the data. However, at the end of the ICP registration process, there are gaps between the point clouds. This paper contains an initial work to investigate the fusion quality of three point clouds (LiDAR point by drone, TLS point, and image-based point) using ICP registration. In this case, the TLS point is used as reference and target as well, while the other point clouds are the source data. This experiment observed the fused model of the ICP and inspected the roughness of each data for further assessment. Then, the M3C2 distance tool in the CloudCompare software was used to show the existence of distance between the point cloud models and the voids as well. Based on the results, the fusion of the three datasets completes the 3D model, except for a few holes caused by obstructions, such as vegetation and roof shadow. It is noted that the image-based point provides a more substitute data, while the LiDAR point by drone has a minor role to complete the model. Hence, for future work, the use of data from another technique can be considered for data fusion and distance refinement is important in this case.

关键词： Data fusion Point cloud Iterative closest point (ICP)

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A Practical Study on Banana (Musa spp.) Plant Counting and Coverage Percentage Using Remote Sensing and Deep Learning 3rd

A Practical Study on Banana (Musa spp.) Plant Counting and C...

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3rd International Conference on Geospatial Information Sciences (iGISc)

作者： Nieto, Sara Mejia, Evelyn Villacis, Ricardo Calderon, Fernanda Villegas, Hector Paillacho, Jonathan Realpe, Miguel Escuela Super Politecn Litoral Fac Ciencias Vida ESPOL Campus Gustavo Galindo Km 30-5 Via Perimetral Guayaquil Ecuador Escuela Super Politecn Litoral CIDIS ESPOL Campus Gustavo Galindo Km 30-5 Via Perimetral Guayaquil Ecuador Escuela Super Politecn Litoral Fac Ingn Elect Computac ESPOL Campus Gustavo Galindo Km 30-5 Via Perimetra Guayaquil Ecuador

ISBN: (纸本)9783031614422;9783031614408;9783031614392

This paper focuses on a practical study to count banana plants and evaluate their coverage in RGB images. Two approaches were used: GLI and K-means algorithms and the YOLOv5m model. The GLI and K-means combination demonstrated the ability to identify the center of the banana plant. The YOLOv5m deep learning approach showed solid performance, evidenced by a significant 86% precision and 90% recall during training. Overall, the methods showed favorable results in the evaluation, with an IoU of 81% for GLI and K-means and 76% for the YOLOv5m application. Regarding coverage estimation, the U-Net architecture achieved an IoU of 52.3% in the testing data. However, the model sought to adapt to the morphology of banana plants. This study contributes to the informed selection of techniques for agricultural monitoring and analysis of crops such as banana.

关键词： Plant counting Coverage percentage Unmanned aerial vehicle Remote sensing Deep learning

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Assessment of the LoD Specification for the Integration of BIM-Derived Building Models in 3D City Models

Assessment of the LoD Specification for the Integration of B...

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18th International 3D GeoInfo Conference

作者： van der Vaart, Jasper Stoter, Jantien Diakite, Abdoulaye Biljecki, Filip Ohori, Ken Arroyo Hakim, Amir Delft Univ Technol Delft Netherlands Univ New South Wales Sydney NSW Australia Natl Univ Singapore Singapore Singapore

ISBN: (纸本)9783031437014;9783031436994;9783031436987

Although level of detail (LoD) is a central concept in 3D city modelling, specifying different LoDs in an unambiguous manner is not straightforward. To resolve this, a set of frameworks have been developed. This paper evaluates the suitability of the LoD framework of (Biljecki et al. 2016) for 3D building models that have been generated directly from BIM models. The output of two BIM shell extractors are tested on how well they can be defined by the framework. It was found that although BIM-derived models can be specified by the framework to a certain degree, the framework is not fully capable to also specify lower quality models and to support all the output that may come from BIM shell extractors. This can be resolved by either addressing issues in the shell extractors' output or in the framework itself. The results of this research can be used to improve the LoD framework and to adjust the shell extractors output to better comply with unambiguous definitions of building models at different LoDs and could be a first step to standardise the conversion of BIM models at different LoDs to be used in urban applications.

关键词： LoD framework 3D city model BIM envelope extractor

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Assessing Maize (Zea Mays) Biomass at Different Growth Stages: A UAV-Based Multispectral Study on Nitrogen Effects 3rd

Assessing Maize (Zea Mays) Biomass at Different Growth Stage...

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3rd International Conference on Geospatial Information Sciences (iGISc)

作者： Merchan, Josue Calderon, Fernanda Broncano, Edgar Nicola, Daniella Alava, Eduardo Escuela Super Politecn Litoral ESPOL Fac Ciencias Vida Campus Gustavo Galindo Km 30-5 Via PerimetralPOB Guayaquil Ecuador Escuela Super Politecn Litoral ESPOL CIDIS Campus Gustavo Galindo Km 30-5 Via PerimetralPOB Guayaquil Ecuador

ISBN: (纸本)9783031614422;9783031614408;9783031614392

This study analyzes the aboveground biomass (AGB) and nine vegetation indices (NDVI, GNDVI, NDRE, SAVI, ExG1, ExG2, GCI, MGRVI, and NGRDI). The study considers multiple influencing factors, including different maize hybrids, nitrogen fertilization levels, and crop growth stages. The results highlight the sensitivity of NDVI and GCI in distinguishing physiological variations among maize hybrids. It's important to note that all the analyzed indices showed significant differences. Moreover, these vegetation indices present substantial sensitivity to variations across different fertilization levels. The study also observed that crop growth stages significantly influence AGB and vegetation indices. Among the analyzed indices, SAVI, ExG2, MGRVI, and NGRDI have the highest correlation with AGB, indicating their potential as indicators of plant biomass. Notably, the nitrogen fertilization level N2 presents a stronger correlation regarding biomass. These findings are crucial for enhancing agricultural management and optimizing plant growth assessment practices. They contribute valuable insights for improving crop yield and resource allocation strategies.

关键词： UAV images Vegetation indices Biomass Remote sensing

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IFC Georeferencing for OSM

IFC Georeferencing for OSM

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18th International 3D GeoInfo Conference

作者： Tauscher, Helga Heigener, Dominik Krishnakumar, Subhashini Graichen, Thomas Schmidt, Rebecca Richter, Julia HTW Dresden D-01069 Dresden Germany Bauhaus Univ Weimar D-99425 Weimar Germany Bundesamt Kartog & Geodasie D-04105 Leipzig Germany Pinpoint GmbH D-09126 Chemnitz Germany Tech Univ Chemnitz D-09111 Chemnitz Germany

ISBN: (纸本)9783031437014;9783031436994;9783031436987

Digital building models are increasingly available and used as sources to inform geospatial data sets. This poses the requirement to spatially locate building models in the geospatial context. In this paper, we present a case study on transferring georeference during conversion from digital building models in IFC (Industry Foundation Classes) to OpenStreetMap (OSM). First, we provide a condensed overview of how coordinates in IFC's local engineering coordinate systems are related to geospatial reference systems with examples for different constellations. Second, we demonstrate a simple method to enrich IFC datasets with georeferences using existing OpenStreetMap outlines. In the third part we describe two substantially different methods to convert engineering coordinates into geospatial coordinates and show how these methods are implemented in two opensource software packages. Finally, we verify and compare the methods with a set of sample IFC and OSM data.

关键词： IFC OSM Georeferences

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A Louvain-Based Approach to Discover Communities and Spatial Relations in a Homicide Knowledge Graph 3rd

A Louvain-Based Approach to Discover Communities and Spatial...

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3rd International Conference on Geospatial Information Sciences (iGISc)

作者： Carrillo-Brenes, Francisco Vilches-Blazquez, Luis M. Inst Politecn Nacl Ctr Invest Computac Mexico City DF Mexico Univ Politecn Madrid Ontol Engn Grp Madrid Spain

ISBN: (纸本)9783031614422;9783031614408;9783031614392

Homicide is a major worldwide issue, and Mexico City is no exception, as illustrated by official data. In this study, we employ the Louvain algorithm that prioritizes modularity value to identify unique clusters within the extensive Mexico City homicide dataset stored in a knowledge graph. Our analysis unveils clusters housing varied murder occurrences that share connections within those same clusters. Spatial analysis within specific geostatistical divisions known as AGEBs (Area Geoestadistica Basica) provides insights into spatial relationships and segregation regarding homicides, contributing to a deeper comprehension of Mexico City's homicide landscape. Moreover, the Louvain algorithm's capacity to identify optimal communities within the graph enhances its relevance for urban analysis by uncovering data relationships. These insights enhance urban planning and security strategies in Mexico City. This research advances the understanding of homicides and highlights the potential of advanced graph analysis techniques. Leveraging Louvain's capabilities, we strive to inform data-driven interventions and enhance safety and security measures, ultimately promoting a safer environment in Mexico City.

关键词： Knowledge graph

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Investigation of CityGML 3.0 for Modelling Temporal Aspects in Underground Land Administration

Investigation of CityGML 3.0 for Modelling Temporal Aspects ...

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18th International 3D GeoInfo Conference

作者： Saeidian, Bahram Rajabifard, Abbas Atazadeh, Behnam Kalantari, Mohsen Univ Melbourne Dept Infrastruct Engn Ctr Spatial Data Infrastruct & Land Adm Parkville Vic Australia UNSW Sch Civil & Environm Engn Sydney NSW Australia

ISBN: (纸本)9783031437014;9783031436994;9783031436987

Rapid urbanisation and limited land availability have led to increased consideration of underground spaces. This increased utilisation of subterranean space has created a rise in its value, highlighting the significance of ownership of underground areas. Afully-integrated digital model that effectively represents underground space ownership is vital for communicating rights, restrictions, and responsibilities (RRRs) in underground spaces. Underground assets are often built and developed vertically at different time slots, resulting in changes to the legal ownership of underground spaces. Therefore, underground RRRs change over time due to factors such as new subdivisions, consolidations, boundary reconstructions, and land acquisitions. Current practices use 2D survey plans and property base maps to manage and communicate underground RRRs, with some textual notations as well as attributes providing temporal information. However, these methods have limitations, and studies have explored the use of 3D models to address these issues, though they often neglect the temporal aspects. Some studies have investigated 4D cadastre (3D cadastre + time) in different jurisdictions, but these studies mainly remain at a conceptual level for above-ground parcels and buildings. CityGML 3.0 is a data model that provides 3D geometries, topologies, semantics, and entities for modelling temporal aspects such as representing dynamic data and time series and maintaining spatial objects' history and versions. This paper explores the temporal aspects of underground land administration (ULA) and investigates CityGML 3.0 entities for modelling these temporal aspects, with a synthetic prototype implemented as a proof of concept to demonstrate the applicability of a 4D ULA model. The result indicates that considering the temporal aspects of ULA using CityGML 3.0 entities can improve the functionality and capability of a land administration model in managing and communicating ownership information

关键词： Underground Temporal 4D cadastre Land administration CityGML

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The Relationship of Spatio-temporal Patterns of Mortality of Diseases Associated with Malnutrition and Food Establishments in Mexico 3rd

The Relationship of Spatio-temporal Patterns of Mortality of...

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3rd International Conference on Geospatial Information Sciences (iGISc)

作者： Galeana-Pizana, Jose Mauricio Tapia-McClung, Rodrigo Verdeja-Vendrell, Leslie Gonzalez-Gomez, Raiza Centro Inves Ciencias Informac Geoespacial Contoy 137 Mexico City 14240 Tlalpan Mexico

ISBN: (纸本)9783031614422;9783031614408;9783031614392

This study explores the relationship between the spatio-temporal behavior of mortality due to multiple causes associated with several diseases and the physical availability of food using data for 2010-2020 at the municipality level in Mexico. For each disease, national databases were collected and standardized, and then we performed SATSCAN temporal and FleXScan spatial cluster analyses. With the Kruskal-Wallis test we analyze the differences between municipalities with high relative risk of mortality and their relationship with food retail units and food establishments. We found statistically significant relationships between clusters by disease and the physical availability of food per hundred thousand inhabitants. The main pattern is a higher average density of convenience stores, supermarkets, fast food chains and franchises, and Mexican snack restaurants in high-risk municipalities, while a higher density of grocery stores and inns, cheap kitchens, and menu restaurants exists in the municipalities with low risk. The density of convenience stores, fast food chains and franchises, and Mexican snack restaurants plays a very important role in mortality behavior, so there should be measures to regulate them and encourage and protect convenience stores, grocery stores, and local food preparation units.

关键词： Cluster analysis

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Generating 3D Roof Models from ALS Point Clouds Using Roof Line Topologies

Generating 3D Roof Models from ALS Point Clouds Using Roof L...

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18th International 3D GeoInfo Conference

作者： Kong, Gefei Fan, Hongchao Norwegian Univ Sci & Technol Dept Civil & Environm Engn NO-7491 Trondheim Norway

ISBN: (纸本)9783031437014;9783031436994;9783031436987

The automation of 3D roof reconstruction has become a critical research topic in the field of GIScience. Existing roof plane-based methods for this purpose need to segment roof planes and further extract roof vertices and edges after topology analysis. However, the roof plane-based primitive extraction and topology analysis may lead to additional errors for the next step's extraction result of roof vertices and edges. In this study, based on segmented roof plane point clouds, roof edges parallel to the x-y plane are extracted at first, and then the topology relationships of these special roof edges are analyzed and corrected by simple rules. This new approach simplifies the extraction of basic roof primitives and analyzes the roof structures and extracts roof vertices and edges at the same time, which reduce the accumulated errors by the processes of "multi-step primitive extraction-topology analysis-extraction of roof vertices and edges". The qualitative and the preliminary quantitative experiment results indicate that the proposed approach can achieve the 3D roof reconstruction well.

关键词： 3D roof reconstruction Point cloud data Rule-based

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Supporting Teleoperated Humanitarian Aid Missions with 3D Visualization Using Remote Sensing Data

Supporting Teleoperated Humanitarian Aid Missions with 3D Vi...

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18th International 3D GeoInfo Conference

作者： Angermann, Lucas Dominik Halbgewachs, Magdalena Felicitas Lechner, Konstanze German Aerosp Ctr DLR German Remote Sensing Data Ctr DFD D-82234 Wessling Germany

ISBN: (纸本)9783031437014;9783031436994;9783031436987

Natural disasters, conflicts and vulnerable supply chains pose challenges for humanitarian aid efforts. The AHEAD project, a collaboration between the German Aerospace Center (DLR) and the World Food Programme (WFP), aims to develop a comprehensive system for delivering relief supplies through remote-controlled trucks. This study explores the potential of a multimodal 3D situational awareness map that integrates remote sensing and other geo data. This advanced map could support teleoperated truck missions in challenging environments, e.g. for route planning, terrain analysis or evaluation purposes. A key focus of this work is the additional value of a 3D visualization compared to established 2D mapping applications. Structured interviews were conducted with end users, scientists and engineers in the project to identify their needs and requirements for a 3D situational awareness map. Based on the outcomes an exemplary 3D web application integrating geodata and crisis information from remote sensing, governmental and open sources was designed and implemented for test sites in Bavaria. In situ drone imagery was captured and added to increase the local situational awareness. During the operation, the live position of the truck was continuously transmitted to the application and displayed as 3D model. The created web-based application was very well received by the end users. Especially the integration of drone imagery draped on the derived surface model in combination with the available satellite data provided a high additional value by highlighting steep slopes or other blockages in the truck's path.

关键词： Humanitarian aid Remote sensing 3D visualization Web application Teleoperation

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