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GeoInformatics-7-2009
article intergeo 2009 trend analysis a report on the sector trends intergeo, the world's most important congress trade fair for geodesy, geoinformation and land management was hosted in karlsruhe, germany from september 22nd to the 24th this year, and attracted more than 16,000 visitors together with 1,450 congress participants. so intergeo 2009 was once again this year s largest meeting point for the industry in europe. among the visitors was a team of academic staff and students from the technische universitat munchen, which was commissioned by the runder tisch gis initiative to perform a survey of the various exhibitors at the show. this article presents the most interesting results of this survey. by ozgur ertac and tatjana kutzner the trend analysis from runder tisch gis initiative once again a team of academic staff and students from the technische universitat munchen was commissioned by the runder tisch gis initiative to perform a survey of the representatives of various exhibitors at intergeo. the trend analysis team prepared a questionnaire covering the leading themes of the sector to investigate new developments, and highlight differences and improvements compared to last year, and of course the impact of new technologies in the gi market. are not only used by themselves but are also combined with other data and applications. in the coupling of 3d city models and environmental modeling for example, 3d city models provide the main input data for simulations used to produce cold air movement calculations. a large amount of geospatial information can also be obtained from 3d city models. for instance pedestrian traffic flow, and vehicle traffic densities and road segments, all of which can be presented in combination with 3d city models to determine spatial distribution patterns. as was widely observed, there are also new developments regarding 3d-viewers in the sector. the market attracted some companies from the video-gaming industry, which provides pioneering possibilities for visualization of 3d city models. it was fascinating to see these examples modeled to the smallest detail and able to run on low-standard pcs. with this gaming experience, it is now much easier to navigate through the inside and around the outside of buildings using 3d city models. citygml, the interchange format for 3d city models has gained huge acceptance as an ogc standard and is now supported in all observed programs. according to the opinion of those responding to the questionnaire, up to now citygml is mainly used in europe, and germany in particular but is gradually gaining a foothold in the usa as well. most respondents agreed that citygml is the most promising standard or model for the description of 3d city models so far developed. laser scanning laser scanning and in particular mobile mapping systems, also appeared to be a central theme at intergeo 2009, which was presented by a large number of service providers. numerous kinematic measurement vehicles for capturing the urban environment (infrastructure acquisition, 3d city modeling, and so on) were on display in the exhibition halls. the imu (inertial measurement unit) is state-of-the-art technology in such vehicles and is supported by every manufacturer to increase data accuracy. thus the scanning operation never stops even when the vehicle is being drive through a tunnel. actual laser scanner releases are characterized by total station functionalities. a fusion of technologies seems feasible in the medium term. especially since suppliers have more and more total station improvements for laser scanning in their repertoire. another objective of the providers is shortening the recording time in the field by capturing more points in less time within a higher accuracy. however, the utilization of laser scanning data is a bit unclear, since there are still no universal software solutions. there is a growing demand in the industry for new software applications designed to generate new implementation areas (e.g. clearance gauge acquisition in railway construction). one implementation area affecting 3d city model production can be seen with aerial data capture in which digital photogrammetry and airborne laser scanning are in competition (espeoctober/november 2009 3d city models wherever you looked, this year s visitors were totally immersed in the theme of 3d, and 3d city models in particular. photo-realistic models appeared to be more realistic and impressive than ever before. however, a clear thematic distinction must be made in the field of 3d, between the purely graphical models and semantic models. the purely graphical model is mainly intended for presentation purposes, whereas the semantic model scores points with its analysis functionality. so far graphical models are primarily used in tourism, urban planning and real estate. actually semantic models have more application areas, but they are not yet totally utilized by most companies and users. so far, semantic model applications include 3d city models for the analysis of noise propagation, and solar energy implementations in which solar energy capacity is computed from the roof forms of 3d city models. today, 3d city models 22
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