The DSM-OPT collection is an initiative of the French Space Agency /
CNES and of Institut National des Sciences de l'Univers /
CNRS-INSU through the
Data-Terra Research Infrastructure (RI) and the Solid Earth Data Hub -
FormaTerre, the Continental Surfaces Data Hub -
THEIA and the French national facility for institutional procurement of Very-High Resolution (VHR) satellite imagery –
DINAMIS. The target is to facilitate access to VHR (0.5m) Digital Surface Models (DSMs) representing the Earth surface topography (e.g. elevation) created from
Pléiades satellite stereo-imagery. The collection consists of a series of products (DSM, hillshades) of interest for the Earth and environmental science community. It covers various sites and landscapes over the World. The dataset is an open collection with regular updates according to the availability of Pléiades stereo-imagery for science and/or public organizations and the generation of topographic products with the
DSM-OPT on-demand service.
The collection consists of DSMs at 0.5, 1.0 or 2.0m spatial resolution, filtered and aligned on reference topographic datasets (e.g. Copernicus EEAD10m DSM over Europe, Copernicus GLO30 DSM over the World). For the photogrammetric process, the MicMac (
Rupnik & al., 2018[1],
Rupnik & al., 2016[2],
Durand & al., 2013[3]) open source library is used, with processing parameters defined by the users who created the DSM using the on-demand service
DSM-OPT. Access to Pléiades satellite imagery (query, production or tasking) is possible through
DINAMIS . The list of Pléiades stereoscopic imagery and the parameters used for the processing are integrated in the product metadata ensuring full reproducibility
More details on the Pléiades imagery
here
More details on the DINAMIS facility
here
More details on the DSM-OPT on-demand service and output products at
https://www.poleterresolide.fr/le-service-dsm-opt/ and
https://www.theia-land.fr/product/dsm-opt-calcul-de-modeles-numeriques-de-surface-a-partir-dimages-stereo-tri-stereo-pleiades/
The collection is disseminated using FAIR principles by the
Data Terra Research Infrastructure (Solid Earth Data Hub -
FormaTerre, Continental Surfaces Data Hub –
THEIA) through the diffusion service EOST/A2S (
a2s-dissemination.u-strasbg.fr/) hosted at University of Strasbourg.
Any publication using a DSM from the DSM-OPT collection must include a reference to the DSM-OPT on-demand service of the Data-Terra RI. For example, in English: This publication is based on the DSM-OPT on-demand webservice developed and operated by FormaTerre, the Solid Earth data hub of the Data Terra Research Infrastructure.
