SYNTHESIS OF STUDIES RELATING TO HRS DTM PRODUCTION

Following "HRS Study Team" initiative, various international specialists accepted to evaluate the possibility of producing DTM using HRS (the SPOT5 High Resolution Stereoscopic instrument) data. SPOTIMAGE company provided the selected data (images), on nine sites where Principal Investigators provided good quality reference DTM (hopefully better than that of HRS DTM). In addition of that, 22 Investigators decided to produce and evaluate DTM with their own tools. IGN (the French National Geographical Institute) is responsible for the synthesis of all the studies carried out. The DTM can be produced of different quality according to final use. For each of nine sites, the investigators had one or two stereo pairs of HRS raw images as well as HRG data for some sites and corresponding references (DTM, Ground control points). All of them had to provide to the secretariat of the "HRS Study Team " a report describing the different phases of the production process and detailing their evaluations.