By Francis Harvey, Yee Leung
This publication incorporates a number of papers from the sixteenth overseas Symposium on Spatial information dealing with (SDH), the optimal long-running discussion board in geographical info technology. This assortment deals readers exemplary contributions to geospatial scholarship and perform from the conference's thirtieth anniversary.
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2), we distinguish contributions akin to “data” in a narrower sense from those more appropriately described as “content”. In the geospatial component (vertical dimension of Fig. 2), we distinguish contributions referring to coordinate locations from those referring to geographic features. Within the “data” component, the different levels of measurement are found: quantitative (ordinal, interval, ratio) and qualitative (nominal). Within the “content” category, a similar distinction is not obvious.
5 Discussion and Conclusion In reviewing the examples of Geoweb applications included in Fig. 2 and the corresponding types of user contributions, it seems that user contributions are determined to some extent by the purpose and the context (ﬁeld of study) of the respective project. The schema in Fig. 2 suggests groups of applications that share similar contribution types as follows: • Crowd-mapping: OpenStreetMap; wikimapia. These applications require users to refer to real-world geographic features when submitting attribute data/contents, which can be structured (OpenStreetMap) or unstructured (wikimapia).
From these examples, we identify different types of contributions in terms of their spatial and attribute dimensions; their data measurement levels; and their content types. The following Sect. 2 examines current research on the Geoweb, geospatial crowd-sourcing, VGI, and user-generated geographic content (UGGC). Section 3 embraces a systems perspective of VGI and discusses the core functional groups of data/content input, management, analysis, and presentation along with examples of existing VGI systems.
Advances in Spatial Data Handling and Analysis: Select Papers from the 16th IGU Spatial Data Handling Symposium by Francis Harvey, Yee Leung