In spatial science and urban applications, “space" is presented by multiple disciplines as a notion referencing our living environment. Space used general term to help understand particular characteristics of the However, definition perception space varies these variations have be harmonised. For example, may diverse definitions classification, same environment abstracted/modelled contradicting notions space, which can lead inconsistencies misunderstandings. this paper, we seek investigate...

Abstract Contemporary public buildings are becoming conglomerates of open, semi‐open and closed spaces, with indoor, outdoor underground sections. For humans robots to navigate seamlessly through such environments, new flexible approaches need be developed. Navigation systems generally rely on a network (nodes edges) as an abstraction underlying space availability. However, indoor networks have different origins. While subdivision approaches, current utilize road‐based approaches. Linking...

Seamless navigation has attracted lots of attention and many methods have been reported in the literature or made available as commercial applications. The process can be interpreted a continuous movement 3D objects from one unoccupied indoor/outdoor space to another. From technical perspective, model is critical components that should perform successful navigation. A major approach build unified support seamless path computation linking indoor networks outdoor road/street-based networks....

ABSTRACT Bluetooth low energy (BLE) technology has gained attraction for indoor localization in recent years due to its power consumption and cost‐effectiveness. However, deploying BLE anchor nodes environments, particularly areas with obstacles that can interfere signal strength, remains a major challenge. This paper proposes novel deployment strategy utilizes an improved gradient‐based optimizer (GBO) algorithm address these challenges. The primary objective is improve both the coverage of...

Abstract Simultaneous localization and mapping (SLAM) is required in many areas especially visual‐based SLAM (VSLAM) due to the low cost strong scene recognition capabilities conventional VSLAM relies primarily on features of scenarios, such as point features, which can make challenging scenarios with sparse texture. For instance, environments limited (low‐even non‐) textures, certain indoors, may fail a lack sufficient features. To address this issue, paper proposes system called visual...

Over recent decades, more and cities worldwide have created semantic 3D city models of their built environments based on standards across multiple domains. models, which are often employed for a large range tasks, go far beyond pure visualization. Due to different spatial scale requirements planning managing various environments, integration Geographic Information Systems (GIS) Building Modeling (BIM) has emerged in years. Focus is now shifting Precinct (PIM) general sense built-environment...

To explore the relationship between objective morphological features and subjective scenic beauty preference of landscape open space units, this study improves research method for morphology quantification, survey analysis. Fourteen factors representing boundary, domain enclosure are quantified based on point cloud data 35 units. Scenic evaluation is conducted online with dynamic panoramic photos. Principal component analysis implemented to convert 14 correlated form into five principal...

Abstract. This paper presents a system architecture for structuring and manipulation of Building Information Models (BIM), three-dimensional (3D) geospatial information, point clouds time series data obtained from sensors. The consists four layers including pre-processing, storage, interface front-end manipulation. To enable the integration different data, unified UML model is developed. explains all steps 3D reconstruction, BIM geo-referencing, storage spatial visualisation. Special...

With the growing complexity of indoor living environments, people have an increasing demand for navigation. Currently, navigation path options in are monotonous as existing systems commonly offer single-source shortest-distance or fastest paths. Such might be not always attractive. For instance, pedestrians a shopping mall may interested that navigates through multiple places starting from and ending at same location. Here, we name it traveling salesman problem (ITSP) path. As its implies,...

Abstract With the development of cities, indoor structures contemporary public or commercial buildings are becoming increasingly complex. Accordingly, need for navigation has arisen. Among positioning technologies, quick response (QR) code, a low‐cost, easily deployable, flexible, and efficient approach, been used purposes. A network (model) is precondition pedestrian path planning. However, no thorough research completed to investigate relationship between networks locations QR codes, which...

Ocean currents pose a significant challenge in the path planning of autonomous underwater vehicles (AUVs), with conventional path-planning algorithms often failing to effectively counter these influences. In response this challenge, we propose algorithm that can consider influences and constraints ocean currents, which leverages strengths two widely employed algorithms, A* genetic (GA), account for on planned paths. Specifically, it enhances initial population generation, formulates fitness...

Simulation platforms are critical and indispensable tools for application developments of unmanned aerial vehicles (UAVs) because the UAVs generally costly, have certain requirements test environment, need professional licensed operators. Thus, developers prefer (or have) to their applications on simulation before implementing them real machines. In past decades, a considerable number robots been developed, which brings convenience developers, but also makes hard choose proper one as they...

Abstract. The navigation of pedestrians can be regarded as their movements from one unoccupied space to another and connected space. These generally occur in three types environments: indoor, outdoor, semi-bounded (top-bounded, and/or side-bounded) spaces. While the two former spaces are subject most attention, latter (semi-bounded) also presents a valuable impact on behaviour. For example, top-bounded environments (e.g. roofs, shelters, etc.) very popular for pedestrian since top structure...

Navigation systems help agents find the right (optimal) path from origin to desired destination. Current navigation mainly offer shortest (distance or time) as default optimal path. However, under certain circumstances, having a least-top-exposed can be more interesting. For instance, on rainy day, with many places possible covered by roofs/shelters is attractive and pragmatic, since protection rain. In this paper, we name environments that but not completely enclosed like indoors...

Reasonable semantic partition of indoor areas can improve space utilization, optimize property management, and enhance safety convenience. Existing algorithms for such partitions have drawbacks, as the inability to consider semantics, slow convergence, sensitivity outliers. These limitations make it difficult schemes that match real-world observations. To obtain proper partitions, this paper proposes an improved K-means clustering algorithm (IK-means), which differs from traditional in three...

Abstract. Over the last decades, building models have become valuable for a multitude of application scenarios, such as visualisation, simulations and decision support. As growth multi-source data consisting semantic 2D/3D spatial information, management becomes feasibility means facilitating development deployment model applications. In addition, most studies focus on modelling buildings at geometric level, while analysis can promising approach to get better understanding built environment....

Abstract Outdoor navigation is widely used in daily life, but faces various issues related to the fidelity of outdoor networks. For instance, agents (pedestrians) are often guided via unrealistic detours around places without clear paths (e.g., squares) or if there vertical constraints such as overpasses/bridges. This partly explained by fact that main sources networks current two‐dimensional road/street Utilizing a three‐dimensional space‐based model, compatible with some indoor approaches,...

Indoor navigation has been studied for many years, but it still limitations. In current navigation, pedestrians need to tell systems the destination, because is one of preconditions path planning. However, in some indoor cases, cannot specify a destination they have no information about where or even be sure if there desired one. We believe that determining service area possible way handle such cases. For example, can reached within 2-min walk. this paper, we propose an determination...

Edge extraction of weld pool image is the key to realize on-line detection and control laser cladding during process industrial manufacturing,and accuracy layer quality largely determined by extracted edge.In this paper, a system based on machine vision built collect molten in cladding. According characteristics image, preprocessed. In an improved multi-structure, multi-scale multi-directional morphological operator proposed anti-noise ability different edge methods are compared analyzed....