Geospatial Open Data Usage and Metadata Quality

Abstract

The Open Government Data portals (OGD), thanks to the presence of thousands of geo-referenced datasets, containing spatial information are of extreme interest for any analysis or process relating to the territory. For this to happen, users must be enabled to access these datasets and reuse them. An element often considered as hindering the full dissemination of OGD data is the quality of their metadata. Starting from an experimental investigation conducted on over 160,000 geospatial datasets belonging to six national and international OGD portals, this work has as its first objective to provide an overview of the usage of these portals measured in terms of datasets views and downloads. Furthermore, to assess the possible influence of the quality of the metadata on the use of geospatial datasets, an assessment of the metadata for each dataset was carried out, and the correlation between these two variables was measured. The results obtained showed a significant underutilization of geospatial datasets and a generally poor quality of their metadata. In addition, a weak correlation was found between the use and quality of the metadata, not such as to assert with certainty that the latter is a determining factor of the former.

Development of an Open Government Data (OGD) Evaluation Framework for BIM

“…They include data standard conversion, mostly from IFC to CityGML [68], data standard integration into a unified building model (UBM) [72], and linked data approaches through semantic web technologies [73]. In recent years, OGD portals and open spatial data infrastructures (SDI), at national and international levels, have been playing an important role in supplying geospatial data typically provided for free in a machine-readable format with minimal restrictions on reuse [74][75][76]. In the geospatial domain, significant advances have been made to foster success and innovation in industry [75].…”

Untitled

“…Были проанализированы требования к знаниям и умениям, а также трудовые функции картографов, предъявляемые за рубежом. Выделены наиболее важные и актуальные требования [Quarati, 2021]:…”

Open government geospatial data on buildings for planning sustainable and resilient cities

“…list of data attributes to be collected), inhibiting comparative analyses, data exchange, and development of tools [29]. More literature exists on open geospatial data in general [30,31,32,33,34], and open government data in cities [35,36]. Studies [37] and initiatives such as the Global Open Data Index (https://index.okfn.org/) and the Open Data Barometer (https:// opendatabarometer.org/) also developed instruments to benchmark data quality.…”