virtual globes
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2021 ◽  
Vol 3 ◽  
pp. 1-6
Author(s):  
Dávid Gerzsenyi ◽  
Gábor Gercsák ◽  
Mátyás Márton

Abstract. It has been just for more than thirty years that the English-language version of the detachable structural-morphological globe of the Earth with 40 cm diameter produced by the Cartographia Enterprise won the prize of the best demonstration aid (Anson and Gutsell 1989) at the Budapest conference of the International Cartographic Association in August 1989. This success was the result of the cooperation between two education institutions (Kossuth Lajos University and Eötvös Loránd University /ELTE/) and two Hungarian firms (Cartographia Enterprise and School Equipment Producing and Marketing Company). This unique product has been the only thematic earth globe designed and published in Hungary and which was duplicated in a relatively large number. It is a rarity today. This is one of the reasons why this globe has been placed in the Virtual Globes Museum (VGM) (http://terkeptar.elte.hu/vgm). This paper gives an overview of the history of these thematic globes: the Hungarian versions made in 1986 (VGM ID 8, 9, 10) and the English versions published in 1988 (VGM ID 66, 67, 68). It introduces the immediate scientific antecedents of their birth and – being a demonstration aid – the process of publishing. The paper also presents the work with the Russian version of the globe carried out at the Institute of Cartography and Geoinformatics, ELTE (VGM ID 154, 155, 156). This will lead to the expansion of the number of globes in the VGM. The close relationship between the new product and the former two editions is also pointed out.


2021 ◽  
Vol 10 (11) ◽  
pp. 756
Author(s):  
Qingxiang Chen ◽  
Jing Chen ◽  
Wumeng Huang

Building information modeling (BIM), with detailed geometry and semantics of the indoor environment, has become an essential part of smart city development and city information modeling (CIM). However, visualizing large-scale BIM models within geographic information systems (GIS), such as virtual globes, remains a technological challenge with limited hardware resources. Previous methods generally removed indoor features in a single-source (BIM) scene to reduce the computational burden from outdoor views, which have not been applied to the multi-source and -scale geographic environment (e.g., virtual globes). This approach neglected special BIM semantics (e.g., transparent windows), which may miss a part of geographic features or buildings and cause unreasonable visualization. Besides, the method overlooked indoor visualization optimization, which may burden computing resources when visualizing big and complex buildings from indoor views. To address these problems, we propose a semantics-based method for visualizing large-scale BIM models within indoor and outdoor environments. First, we organize large-scale BIM models based on a latitude-longitude grid (LLG) in the outdoor environment; a multilayer cell-and-portal graph is used to index the structure of the BIM model and building entities. Second, we propose a scheduling algorithm to achieve the integrated visualization in indoor and outdoor environments considering BIM semantics. The application of the proposed method to a multi-scale and -source environment confirmed that it can achieve an effective and efficient visualization for huge BIM models in indoor-outdoor scenes. Compared with the previous study, the proposed method considers the BIM semantics and thus can visualize more complete features from outdoor and indoor views of BIM models in the virtual globe. Besides, the study only loads as visible data as possible, which can retain lower the volume of increased geometry, and thus keep a higher frame rate for the tested areas.


Author(s):  
Kadek Ananta Satriadi ◽  
Barrett Ens ◽  
Tobias Czauderna ◽  
Maxime Cordeil ◽  
Bernhard Jenny

Author(s):  
F. Betz ◽  
M. Lauermann ◽  
B. Cyffka

In recent years, fluvial geomorphology included a range of new technologies for the characterization of riverine landscapes in the pool of methods. LIDAR, the analysis of drone imagery or satellite remote sensing improved the ability to analyze river systems in manifold ways. However, the high demand for (often expensive) data and processing skills limit the application commonly to smaller study reaches or to regions where data is already available. In contrast, a range of conceptual frameworks for the geomorphological characterization of river systems highlights the relevance of integrating the catchment scale context. Against this background, virtual globes such as Google Earth are cost-efficient alternatives as they make high resolution satellite imagery available almost worldwide. Merging the information mapped from virtual globes with digital elevation data allows the interpretation of riverscape attributes in the context of the longitudinal profile. In our study, we present the geomorphological mapping of the more than 600 km long Naryn River in Kyrgyzstan based on different virtual globes and the SRTM-1 digital elevation model. The experience from this mapping exercise suggests that the combination of virtual globe imagery and elevation data is a powerful and cost-efficient approach for river research and application in the context of data-scarce river corridors.


2020 ◽  
pp. paper12-1-paper12-15
Author(s):  
Sergey Presnyakov ◽  
Grigory Boyarshinov ◽  
Anastasia Odintsova ◽  
Alena Rybkina

The article describes methods for spherical visualizing of data as global geophysical, environmental, atmospheric processes on the surface of planets and different kinds of processes on the surface of spherical bodies. Such data can be demonstrated through virtual globes and spherical screens. Volumetric visualization significantly increases the degree of visibility, comprehension and assimilation of the demonstrated content and may be used in the scientific and educational process. The main goal of this research is to develop database requirements for spherical visualization. The requirements are based on the modern educational and science research representation approaches. The following tasks have been formed and accomplished: a strict classification of data; a convenient way to interact at the stage of adding data to the database and analyzing; their representativeness; introduction of additional data classifications; the possibility of individual user navigation and a high degree of inter-activity. For the proposed model, the basic functions of the database management system are described. Requirements to a basic hierarchical data model were substantiated. The main object of hierarchical data model is a spherical Slide representing a separate topic of particular discipline. The superstructure is used above the hierarchical model in the form of an individual route map representing a directory with links to the main database.


2020 ◽  
Vol 2 ◽  
pp. 1-2
Author(s):  
Mátyás Márton ◽  
László Zentai ◽  
Gábor Gercsák

Abstract. The final result of the Perczel Project was born after ten years of research at the Department of Cartography and Geoinformatics of Eötvös Loránd University by end 2019. The plan was to completely reconstruct Perczel’s giant globe. The globe, dated 1862, was made by László Perczel and it is now kept in the Map Room of the National Széchényi Library. It is a unique manuscript globe with a diameter of 127.5 cm, but its condition was very poor (several serious defects and illegible labels). In addition to the cartographic tasks by the Department, it was necessary to involve graphic designers and object restorers, model makers, a wood restorer, a coppersmith and an engraver; they were all coordinated by the Archiflex Studio. As a result of their collaboration such globes were born which most probably look like the original manuscript product looked almost 160 years ago. The facsimile was made in three copies.Before the Archiflex Studio started to organize the work, the Department created – by processing 800 photographs – a digital virtual 3D facsimile to register the state of the globe. This globe was entered into the Virtual Globes Museum (http://terkeptar.elte.hu/vgm). The original large-resolution photos were also used for making the segments of the digital contentual globe map between 2008 and 2012. This intensive work (with the cooperation of several BSc, MSc and PhD students of cartography) produced a series of digitally recreated segments of the globe map, which were redrawn, recoloured, and registered the legible letters. The digital contentual facsimile was used to prepare the virtual 3D model, which was also placed in the Virtual Globes Museum in 2012.The work on the globe at the Department ceased in 2012–13, but continued in a half-year project in 2019, before the start of the actual physical reconstruction. The project was undertaken by Mátyás Márton, the head of the former Perczel Poject. The work meant that the digital contentual facsimile completed in 2012 had to be further processed: namely, the digital reconstruction of the globe map. Various cartographic challenges had to be solved to accomplish this task:The possible sources had to be identified: those maps and atlases had to be found that Perczel may have used for the preparation of his globe. The collected publications were compared to the easily readable parts of the globe; in this way, it was possible to select those that were probably used. These sources were considered basic sources for further work.The selected sources made it possible to achieve two goals: first, to complete the letters of place names that were partly illegible, and second, to add the graphical elements to those parts of the globe that had been completely destroyed.There was only limited time to carry out the above tasks, and at the same time, we had to serve those who were working on the production of the three facsimile globes under the direction of the artistic director of the project.This paper gives only an outline of the events of the progress of the digital recreation, that is the digital (virtual) contentual facsimile of the globe at the Department in the past more than ten years. It gives details on the cartographic tasks needed before the physical reconstruction. This made it possible to make the digital restoration and digital reconstruction of the globe map as complete as possible. As a result, it also became possible to prepare the virtual 3D model of the content of the reconstructed facsimile globe. In comparison to the state of the globe in 2012, altogether 2,872 graphical elements and 3,252 place name amendments and corrections were made in the project. Hill shading was added or completed on 318 places – mostly on the damaged parts. Further, the content of the badly damaged calendar ring was explored. (The study and reconstruction of the artistic drawing of the signs of the zodiac was done by a designer-graphic artist.) It is a cartographic interest that the points of the compass were written in old-style Hungarian words on the calendar frame (horizon ring), which are not used today.Finally, the authors present the contemporaneous facsimiles in their physical form, which is the result of the project coordinated by the Archiflex Studio (the 3D models can be seen in the VGM). The completion of these facsimiles makes this work of art – known as Perczel’s globe in map history – a common property representing great scientific and cultural value.


2019 ◽  
Vol 156 ◽  
pp. 235-246 ◽  
Author(s):  
Liangfeng Zhu ◽  
Xinlan Chen ◽  
Zhiwen Li

Author(s):  
M. A. Brovelli ◽  
P. Boccardo ◽  
G. Bordogna ◽  
A. Pepe ◽  
M. Crespi ◽  
...  

<p><strong>Abstract.</strong> The paper deals with the general presentation of the Urban GEO BIG DATA, a collaborative acentric and distributed Free and Open Source (FOS) platform consisting of several components: local data nodes for data and related service Web deploy; a visualization node for data fruition; a catalog node for data discovery; a CityGML modeler; data-rich viewers based on virtual globes; an INSPIRE metadata management system enriched with quality indicators for each dataset.</p><p>Three use cases in five Italian cities (Turin, Milan, Padua, Rome, and Naples) are examined: 1) urban mobility; 2) land cover and soil consumption at different resolutions; 3) displacement time series. Besides the case studies, the architecture of the system and its components will be presented.</p>


2019 ◽  
Vol 8 (6) ◽  
pp. 253 ◽  
Author(s):  
Frederick Lafrance ◽  
Sylvie Daniel ◽  
Suzana Dragićević

Web-mapping has been widely used to facilitate citizen participation in smart cities. Web-mapping has evolved from 2D static maps towards more dynamic and immersive 3D worlds such as virtual globes and scenes. Although current technologies allow us to build multidimensional representations, there is still a lack of research studies on how to further leverage them to foster citizen participation. Information on space–time changes can be an important asset for a successful citizen participation process. Citizens may need to track the evolution of their city over space and time, and how their participation will impact the urban planning and decision-making process. Consequently, the main objective of this research study is to design and develop a multidimensional (2D, 3D, 4D) web-mapping platform where citizens can better assess and understand the spatiotemporal evolution of their cities. User testing was conducted to assess the multidimensional representation of the animations used, and the spatiotemporal mechanism and interface features. Results showed that it is recommended to integrate spatiotemporal simulations to citizen participation platforms so citizens can better assess the impacts of their choices. We also assessed that 3D does not always communicate information better than 2D. Future work will aim at testing the platform in a consultation process with a representative sample of participants.


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