The construction of a large-scale integrated information system has been a hot issue in the field of geoinformatics. It aims to integrate aboveground and underground spatial information and objects in a unified visual environment. Virtual globe, as the most commonly used technology in the construction of Digital Earth, can provide a platform and framework for the integration and visualization of worldwide spatial objects and models. However, the existing works mainly focused on terrains and aboveground spatial entities, and there is still little research on the integration and visualization of large-scale underground geological models and entities in a virtual globe. In this work, the data organizations of aboveground and underground 3D spatial objects were analyzed in detail according to the technical characteristics of the virtual globe. Improved strategies were proposed to achieve the integrated visualization of aboveground and underground 3D spatial objects in a virtual globe-based spherical coordinate. In this process, the terrain surface based on Triangulated Irregular Network (TIN) was used as an intermediate layer to unify the spatial coordinate system. An improved scene cutting approach was used to overcome the challenge that underground geological structures cannot be integrated and visualized with aboveground spatial entities, terrains and landforms. Finally, we developed a virtual globe-based prototype system using OpenSceneGraph (OSG) and osgEarth as the 3D visualization engine. The aboveground and underground spatial models of Fuzhou, a coastal city of eastern China, were applied in this system to verify the validity of the strategies proposed in this paper. In addition, the efficiency of this system in terms of scheduling and visualizing was tested by using the massive models of Fuzhou.
Earth Science Informatics – Springer Journals
Published: May 31, 2018
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera