Abstract
Abstract. DSM generation using stereo satellites is an important topic for many applications. China has launched the three line ZY-3 stereo mapping satellite last year. This paper evaluates the ZY-3 performance for DSM and orthophoto generation on two scenes east of Munich. The direct georeferencing performance is tested using survey points, and the 3D RMSE is 4.5 m for the scene evaluated in this paper. After image orientation with GCPs and tie points, a DSM is generated using the Semi-Global Matching algorithm. For two 5 × 5 km2 test areas, a LIDAR reference DTM was available. After masking out forest areas, the overall RMSE between ZY-3 DSM and LIDAR reference is 2.0 m (RMSE). Additionally, qualitative comparison between ZY-3 and Cartosat-1 DSMs is performed.
Highlights
DSM generation using stereo satellites is an important topic for many applications
This paper evaluates the ZY-3 performance for DSM and orthophoto generation on two scenes east of Munich
For SPOT 5 HRS, RPCs were generated by fitting an object space ground control point (GCP) grid
Summary
DSM generation using stereo satellites is an important topic for many applications. This paper evaluates the ZY-3 performance for DSM and orthophoto generation on two scenes east of Munich. The nadir looking panchromatic line camera consists of 24576 pixels with a size of 7μm and has a ground resolution of 2.2m/pixel. The multispectral camera has a resolution of 5.8m and covers the blue, green, red and near infrared bands. It is 9216 pixels wide, and its pixelsize is 20μm. The reference data and compare the ZY-3 results to the ones obtained with SPOT-5 HRS. During this evaluation, the following data sets are used:. Two ZY-3 Scenes located east of Munich, Germany These were acquired on 9th of September 2012. Survey points with schematics showing their location relative to buildings and streets
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
