[Talk-TW] OSM 3D

[deng dongpo]

上個月才和國內3D地理空間視覺化的廠商聊到如何用OSM資料來做3D的地圖，已經有人發表在重量級的GIS期刊上。

http://www.tandfonline.com/doi/abs/10.1080/13658816.2012.721552#.UZ7ciGSSCNE

dongpo


Towards generating highly detailed 3D CityGML models from OpenStreetMap
Abstract

About one decade has passed since US vice president Al Gore articulated his
vision of Digital Earth (DE). Within this decade, a global multi-resolution
and three-dimensional (3D) representation of the Earth, which sums up the
DE vision, increasingly gained interest in both public and science. Due to
the desired high resolution of the available data, highly detailed 3D city
models comprise a huge part of DE and they are becoming an essential and
useful tool for a range of different applications. In the past as well as
at present, 3D models normally come from a range of different sources
generated by professionals, such as laser scans or photogrammetry combined
with 2D cadaster data. Some models are generated with semi-automated or
fully automated approaches, but in most cases manual fine tuning or even
manual construction from architectural plans is required. Further beyond
outdoor city models, DE additionally envisages the provision of indoor
information. That is, the interior structure of public or publically
accessible buildings, such as airports or shopping malls, is represented
and made available in 3D; however, at the moment, such models are mostly
created by hand and essentially based on professional data sources. In
contrast to such professional data, which is mainly captured by surveyors
or companies, the last few years revealed the phenomenon of crowdsourced
geodata, which receives an increasing attractiveness as an alternative data
source for many Geographic Information Systems (GIS). Former research
already demonstrated the power and richness of such geodata – especially
OpenStreetMap (OSM) – and it has also been proved that this
non-standardized, crowdsourced geodata can be combined with international
standards of the Open Geospatial Consortium (OGC). For example, CityGML
Level-of-Detail 1 (LoD1) and LoD2 models have already been created
automatically from OSM. The research presented in this article will further
continue on the automated generation of CityGML models from OpenStreetMap.
Essentially, a method for the creation of highly detailed CityGML LoD4
models with interior structures will be explained. By applying the invented
approach on existing OSM data, limitations and restrictions of the
IndoorOSM mapping proposal, the available data and the developed approach
are revealed and discussed.
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