Abstract
Abstract. Automated large-scale retrieval of stereo photogrammetric DTMs of Mars fall into three categories: use of COTS software such as BAE-SOCET®; private software such as the DLR-VICAR software suite and open source solutions such as the NASA Ames Stereo Pipeline (ASP). We describe here a novel open source system developed on the back of ASP known as CASP-GO (Tao et al., 2018) which has automated and extended ASP to be able to be applied to all modern single-pass or repeat-pass stereo photogrammetric datasets from 21st century systems such as HRSC, CTX and HiRISE, CASP-GO also includes an automated co-registration system which employs HRSC (itself linked to MOLA) as the base-map upon which all other DTMs are co-registered. We show an example here of this automated co-registration system applied to multi-resolution stacks including CRISM images. Several thousand multi-resolution 3D products, Digital Terrain Models (DTMs) and their corresponding orthorectified images (ORIs) have been generated and used in a wide variety of scientific studies, a few examples of which are shown here. Finally, a new method distributing these products providing long-term archiving and ease of access using DOIs is shown employing the ESA-PSA Guest Storage Facility and their corresponding display within the iMars webGIS system.
Highlights
Within the EU FP-7 iMars project, a fully automated multi-resolution Digital Terrain Model (DTM) processing chain was developed at UCL for Mars Reconnaissance Orbiter (MRO) Context Camera (CTX), High Resolution Imaging Science Experiment (HiRISE) and Mars Express High-Resolution Stereo Camera (HRSC) stereo-pairs, called the Co-registration Ames Stereo Pipeline (ASP) with Gotcha Optimisations (CASP-GO) [1]
After the end of the iMars project in March 2017, [4] describes how cloud computing was employed to generate some 5,300 CTX DTMs using Co-registration ASP with Gotcha Optimisations (CASP-GO). These were subsequently filtered by eliminating repeat retrievals over the same area and performing a visual analysis of the quality of DTM and orthorectified images (ORIs) (OrthoRectified Image) products reduced this to 2,375 products
All these quality controlled products are available for direct download in geoTIFF/PVL format via the European Space Agency (ESA) Guest Storage Facility [5] landing-page at https://www.cosmos.esa.int/web/psa/UCLMSSL_iMars_CTX_v1.0 We show here some results of these products as well as more recent work on trying to generate a multi-resolution map of the vast Valles Marineris canyon system based on the HRSC basemap shown in the previous section
Summary
Within the EU FP-7 iMars (http://www.i-mars.eu) project, a fully automated multi-resolution Digital Terrain Model (DTM) processing chain was developed at UCL for Mars Reconnaissance Orbiter (MRO) Context Camera (CTX), High Resolution Imaging Science Experiment (HiRISE) and Mars Express High-Resolution Stereo Camera (HRSC) stereo-pairs, called the Co-registration ASP with Gotcha Optimisations (CASP-GO) [1]. We show here a variety of different new products generated using CASP-GO, including large-area mosaics and introduce the reader to a new method of distribution of these products at the ESA-GSF
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