VGI IN AUTOMATIC INFORMATION RETRIEVAL FROM BIG RS DATA

This paper describes how Volunteered Geographic Information (VGI) can support automatic information retrieval (IR) from big remote sensing (RS) data on an example of the Global Human Settlement Layer (GHSL)[1]. Here, the OpenStreetMap 1 (OSM) derived data are used within a satellite imagery processing framework at several stages of an information layer production. Although, we focus on built-up areas, some similarities could be identified in the methods for extracting occurrence estimation of other geographic feature produced by the RS community (e.g. forest coverage). This work introduces briefly the GHSL, the VGI derived datasets and how they are used. A discussion on levered issues related with the VGI data is provided.