Enhanced Access to NASA Heterogeneous Geodetic Imaging Products through GeoGateway Analysis, Modeling, and Response Tools
Andrea Donnellan, NASA's Jet Propulsion Laboratory
GeoGateway’s enhanced access to NASA geodetic image data will steer users to relevant products using automated feature extraction, manual search tools, and data quality metrics. The objective of GeoGateway is to allow users to efficiently find and use NASA geodetic imaging data products. We will integrate new functionality to access, analyze, and model GPS and Unmanned Aerial Vehicle Synthetic Aperture Radar (UAVSAR) data, with incorporation of spaceborne InSAR, Landsat, and optical imagery products as appropriate. GeoGatway goals are to a) simplify the discovery of geodetic imaging products; b) enable researchers to explore and integrate data products through online or offline analysis; c) allow researchers to easily share, publish, and collaborate on results of these online experiments. We will increase the value of existing geodetic imaging products to researchers through automated machine learning and computer vision techniques to identify features, anomalies, and artifacts. The objective of this project is to bridge the gap between production and end-use of data products allowing users to efficiently find and use NASA geodetic imaging data products and integrate them with other data products. The data products are far more powerful when they are used in conjunction with other products to test a hypothesis. Automated and manual approaches will be available for the user through the interface. Users will be able to perform time and geographically limited search for products. Time windowing is particularly important because crustal deformation velocities vary over time as earthquakes and post-seismic deformation occur, causing offsets and rate changes. Users will be able to plot results by different reference stations highlighting different tectonic characteristics. We will enhance our rating and annotation system so that users can tag products by quality. User ratings will be aggregated and available for search and sorting. Automated feature detection will identify edges, discontinuities, anomalies, and data product quality. Statistics on the GPS and UAVSAR data will enable the user to separate data artifacts and errors from geophysical signals. This project is directly relevant to the Advancing Collaborative Connections for Earth System Science (ACCESS) solicitation because it meets the primary objective, which is to enhance, extend, and improve existing components of NASA’s distributed and heterogeneous data and information systems infrastructure. NASA heterogeneous crustal deformation data come in the form of GPS position time series and radar or optical maps of components of surface deformation. Earthquakes and post-seismic response complicate the already heterogeneous data by adding episodic jumps and changing rates of surface deformation to the products. Data volumes will become even larger and the surface deformation data more complicated when NASA launches NISAR. This forward-looking project will use existing data as a testbed for the NISAR mission. GeoGateway components are open source and available for reuse by other projects and researchers. The emphasis on facilitating routine workflow promotes the reuse of techniques necessary to advance earthquake research. GeoGateway contains the infrastructure to access distributed data and tools to improve data usability.
Last Updated: Oct 19, 2018 at 2:21 PM EDT