WG IV/1: Methods for the Update and Verification of Geospatial Databases

Our Mission

ISPRS Working group IV/1 aims to promote the development of new methodologies, algorithms and applications related for the update and verification of geospatial data bases. This includes different geospatial data bases (e.g. topographic data sets and building information models (BIM)) using data acquired from different systems (terrestrial, airborne and mobile mapping systems). To this purpose, the WG organises workshops to exchange the latest developments in this field. Furthermore the WG provides links to publicly available datasets and benchmark tests. In collaboration with other ISPRS Working Groups, the WG will also evaluate the information content and accuracy of new high-resolution sensors.

Working Group Officers:


David Holland

David Holland
Ordnance Survey
Adanac Drive
United Kingdom, SO16 0AS
+ 44 (0) 23 8005 5767



Petra Helmholz

Petra Helmholz
Department of Spatial Sciences
Western Australian School of Mines
Curtin University
GPO Box U1987
Perth WA 6845
+61 8 9266 3369
+61 8 9266 2703



Penglin ZHANG

Penglin ZHANG 
School of Remote Sensing and Information Engineering 
Wuhan University 
129 LuoYu Road 
+86 27 68771421 (O), 
+86 27 68778086 


Giorgio Agugiaro

Giorgio Agugiaro 

3D Optical Metrology Unit 
FBK- Fondazione Bruno Kessler 
Via Sommarive 18 
38122 Trento 
+39 0461 314 913 
+39 0461 314 340 


Terms of Reference:

  • To investigate the update and verification of topographic vector datasets, digital terrain models, orthoimages and thematic (landcover) datasets from remotely sensed data with an emphasis on mapping in a production environment.
  • To assess links between high resolution images and mapping tools developed through research, and their implementation in mapping agencies and commercial organisations.
  • To investigate the methods of creating and maintaining spatial databases (including 3D city models and BIMs) from terrestrial and mobile data acquisition systems.
  • To investigate how synergy may be achieved between the various sensors, for topographic and thematic mapping.
  • To determine optimum methodologies for the integration of mapping data with heterogeneous data sources.
  • Evaluation and use of semi-automated and automated algorithms for update, change detection and quality control of spatial databases.
  • Facilitation of the integration of these algorithms into digital photogrammetric and GIS workstations, enterprise and web-based photogrammetric systems.
  • In collaboration with other ISPRS Working Groups, evaluate the information content and accuracy of new high-resolution sensors.