Geomatics

15 pages, 4178 KiB

Open AccessArticle

Automated Modeling of Road Networks for High-Definition Maps in OpenDRIVE Format Using Mobile Mapping Measurements

by Kai-Wei Chiang, Hao-Yu Pai, Jhih-Cing Zeng, Meng-Lun Tsai and Naser El-Sheimy

Geomatics 2022, 2(2), 221-235; https://0-doi-org.brum.beds.ac.uk/10.3390/geomatics2020013 - 01 Jun 2022

Cited by 5 | Viewed by 4310

With growing attention being devoted to autonomous vehicle (AV) safety, people have recently attached importance to high-definition (HD) maps. HD maps are not limited by environmental factors and can limit AVs driving in certain lanes. HD maps provide accurate auxiliary information on factors [...] Read more.

With growing attention being devoted to autonomous vehicle (AV) safety, people have recently attached importance to high-definition (HD) maps. HD maps are not limited by environmental factors and can limit AVs driving in certain lanes. HD maps provide accurate auxiliary information on factors such as road geometry, traffic sign placement, and traffic topology. Nowadays, most HD maps are made from point clouds data, and this data contains accurate 3D position information. However, the production costs associated with HD maps are substantial. This article proposes an algorithm that reduces a great amount of time and human resource. The algorithm is divided into three phases, lane lines’ extraction from point clouds, modelling lane lines with attributes, and building OpenDRIVE file. The algorithm extracts lane lines resting on intensity value within the range of roads. Next, it models lane lines by cubic spline interpolation with the result of first phase, and build the OpenDRIVE file following the announcement of OpenDRIVE. The final result is compared with the verified HD map from the mapping company to analyze the accuracy. The root mean square (RMSE) obtained were 0.069 and 0.079 m for 2D and 3D maps, respectively. Full article

(This article belongs to the Special Issue High Definition Maps for Intelligent Transportation Applications)

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24 pages, 4029 KiB

Open AccessFeature PaperReview

Introducing Smart Marine Ecosystem-Based Planning (SMEP)—How SMEP Can Drive Marine Spatial Planning Strategy and Its Implementation in Greece

by Stilianos Contarinis, Byron Nakos and Athanasios Pallikaris

Geomatics 2022, 2(2), 197-220; https://0-doi-org.brum.beds.ac.uk/10.3390/geomatics2020012 - 13 May 2022

Viewed by 5763

Abstract

This paper introduces smart marine ecosystem-based planning (SMEP), a marine spatial planning (MSP) strategy for more participatory and responsive marine governance by leveraging “smart” digital services. SMEP denotes an iterative MSP process with planning cycles that incorporate continuous data gathering of spatial–temporal natural [...] Read more.

This paper introduces smart marine ecosystem-based planning (SMEP), a marine spatial planning (MSP) strategy for more participatory and responsive marine governance by leveraging “smart” digital services. SMEP denotes an iterative MSP process with planning cycles that incorporate continuous data gathering of spatial–temporal natural phenomena and human activities in coastal and marine areas, with ongoing data mining to locate key patterns and trends, to strive for periodic refinement of the MSP output. SMEP aims to adopt an ecosystem-based approach, taking into account both living and nonliving aspects of the marine environment, and making use of all available spatial data at various resolutions. In pursuit of SMEP implementation, the paper examines the current state of the MSP process in Greece and relates its long-term success with the establishment of a marine spatial data infrastructure (MSDI), employing contemporary nautical cartography standards along with hydrospatial data services. Full article

(This article belongs to the Special Issue Advances in Ocean Mapping and Nautical Cartography)

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16 pages, 3451 KiB

Open AccessArticle

A Practical Algorithm for the Viewpoint Planning of Terrestrial Laser Scanners

by Fengman Jia and Derek D. Lichti

Geomatics 2022, 2(2), 181-196; https://0-doi-org.brum.beds.ac.uk/10.3390/geomatics2020011 - 22 Apr 2022

Cited by 3 | Viewed by 1889

Abstract

Applications using terrestrial laser scanners (TLS) have been skyrocketing in the past two decades. In a scanning project, the configuration of scans is a critical issue as it has significant effects on the project cost and the quality of the product. In this [...] Read more.

Applications using terrestrial laser scanners (TLS) have been skyrocketing in the past two decades. In a scanning project, the configuration of scans is a critical issue as it has significant effects on the project cost and the quality of the product. In this paper, a practical strategy is proposed to resolve the problem of the optimal placement of the terrestrial laser scanner. The method attempts to reduce the number of viewpoints under the premise that the scenes are fully covered. In addition, the approach is designed in a way that the solutions can be efficiently explored. The method has been tested on 540 polygons simulated with different sizes and complexities. The results have also been compared with a benchmark strategy in terms of the optimality of the solutions and runtime. It is concluded that our proposed algorithm ties or reduces the number of viewpoints in the benchmark paper in 85.6% of the 540 tests. For complex environments, the method can potentially reduce the project cost by 10%. Although with relatively lower efficiency, our method can still reach the solution within a few minutes for a polygon with up to 500 vertices. Full article

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20 pages, 6135 KiB

Open AccessArticle

A Dispersion Index for the Analysis of the Distribution of Activities in the Tunisian Coastal City of Nabeul

by Narjiss Bakhtyari, Asma Rejeb Bouzgarrou, Christophe Claramunt and Hichem Rejeb

Geomatics 2022, 2(2), 161-180; https://0-doi-org.brum.beds.ac.uk/10.3390/geomatics2020010 - 21 Apr 2022

Viewed by 2908

Abstract

This research investigates the duality of the spatial organization and urban activities generated by the coastalization processes of the city of Nabeul. The first part of the study analyzes the city’s fragmentations of the urban landscape using a novel generic index of directional [...] Read more.

This research investigates the duality of the spatial organization and urban activities generated by the coastalization processes of the city of Nabeul. The first part of the study analyzes the city’s fragmentations of the urban landscape using a novel generic index of directional dispersion and a set of space syntax metrics. These structural and functional properties are studied by the concentration and/or dispersion of urban functions of the evolution and development patterns. Among the emerging features, we observe a dispersion of urban activities beyond a central radius all along the western periphery of the city, confirming the phenomenon of urban sprawl that many Tunisian cities are experiencing. These spaces generate urban fragmentations of “new polarity zones” under the influence of the coastline attraction. Finally, this study introduces a novel approach for identifying urban structural polarity and activities, as well as new perspectives for coastal land management and planning. Full article

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Geomatics, Volume 2, Issue 2 (June 2022) – 4 articles

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