Science Service System

Summary of Proposal LAN0130

TitlePilot Project: Digital Elevation Model for Hilly Areas in Romania - test area: Valea Calugareasca (Sub-Carpathian Hills)
Investigator Dana, Iulia Florentina - Romanian Space Agency, Space Applications
Team Members
Poncos, Valentin - ASRC,
SummaryThe proposal is regarding the implementation of a pilot project for the main test area Valea Calugareasca and eventually (if this might be possible) for other rest sites like: Abrud-Campeni, Bucuresti, Constanta, Focsani and Rieni-bh. One of the objectives of the project is the scientific assessment of the digital elevation model generated by processing TerraSAR-X data for the selected areas. One of the project’s goals is to test the suitability of the Digital Elevation Model generated from TerraSAR-X data for Hilly Areas in Romania - test area: Valea Calugareasca (Sub-Carpathian Hills). This goal might be extended for the other test sites: suitability of the TerraSAR-X DEM for urban and built-up areas (Bucuresti and Constanta), for mountainous areas (Abrud-Campeni) and varying relief areas (Focsani and Rieni-bh). The generation of the digital elevation model using TerraSAR-X data will be done using the Earth View InSAR software (Vexcel), ROI-PAC (Repeat Orbit Interferometry Package – JPL NASA), RAT (Radar Tools) or other software that provides InSAR or alternatively stereo processing capability. The result of the interferometric processing of TerraSAR-X data will be in fact a digital surface model (showing the height of the visible surface). Another objective of the project will be the filtering of the digital surface model to digital elevation model (including only the height of the bare ground). The analysis shall also include the effect of the interpolation of the data sets reduced for points not belonging to the bare ground. For filtering the investigation will be made separately for open areas as well as for forest. The evaluation of the accuracy of the digital elevation model will be tested depending on the terrain inclination. The varying terrain of test area Valea Calugreasca enables a detailed study. The evaluation of the digital elevation model will be made using GPS measurements in points included in the national geodetic network. Also, the TerraSAR-X data will be used for the study of the terrain influences in the case of orthorectification VHR satellite images. Romanian Space Agency is also involved in an on-going project regarding the test area Valea Calugareasca (Complex Offer for Strategic Management of Patrimony Rehabilitation and Development of Economic Competivity of the Romanian Wine-Growing Industry in the EU's Common Agricultural Policy). Considering that the different operation modes allow the application of TerraSAR-X data for large-scale monitoring purposes, the project may also contain applications for agriculture (mapping of acreage, mapping of field heterogeneities, crop type recognition, growth stage assessment), forestry (tree type identification, mapping of disturbances caused by fire, insect attacks, deforestation), land cover mapping (mapping of broad land cover and land use classes) and disaster management (risk and vulnerability assessment, monitoring of hazard prone zones, damage assessment). The input data require high resolution TerraSAR-X data in order to precisely orthorectify the VHR satellite images. The outcome of the project will be a scientific report including all the results obtained during the study: the results of the interferometric processing of TerraSAR-X data, the results of the generation of digital elevation models based on TerraSAR-X data, the result of evaluating the TerraSAR-X digital elevation model depending on the presence of vegetation, terrain inclination and type of terrain, the result of filtering the digital surface model, the result of GPS measurements and the result of using the TerraSAR-X digital elevation model for the orthorectification of VHR satellite images. The funding of the project is supported by the Romanian Space Agency.

Back to list of proposals

© DLR 2004-2016