Transferring deep learning models for hydrographic feature extraction from IfSAR data in Alaska

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Abstract

The National Hydrography Dataset (NHD) managed by the U.S. Geological Survey (USGS) is being updated with higher-quality feature representations through efforts that derive hydrography from 3DEP HR elevation datasets. Deriving hydrography from elevation through traditional flow routing and interactive methods is a complex, time-consuming process that must be tailored for different hydrogeomorphic conditions. The large volume of surface water features and HR remote sensing data make manual annotation of the water features over the entire nation infeasible. Furthermore, annual and seasonal variations of surface waters warrant some level of periodic updates to hydrography. Advances in deep learning technologies provide an opportunity to automate hydrography extraction and scale up the process to a nationwide level. One major challenge, however, is the effect of spatial heterogeneity due to the wide variety of hydrogeomorphic conditions in the United States. In other words, it is unclear how a deep learning model pre-trained in one set of hydrogeomorphic conditions can be effectively applied to other conditions for hydrographic feature extraction. This paper aims to provide some clarity in this regard by testing automated deep learning and its transferability to the extraction of hydrography from digital elevation model (DEM) data spanning a range of hydrogeomorphic conditions in Alaska. In transfer learning, the knowledge (e.g., neural network weights) from one domain is transferred to other domains and thereby decrease training requirements in the target domain.

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Publication type Conference Paper
Publication Subtype Conference Paper
Title Transferring deep learning models for hydrographic feature extraction from IfSAR data in Alaska
Year Published 2023
Language English
Publisher ICA Commission on Multiscale Cartography
Contributing office(s) Center for Geospatial Information Science (CEGIS)
Description 3 p.
Conference Title GIScience 2023 Workshop on CartoAI: AI for cartography
Conference Location Leeds, United Kingdom
Conference Date September 12-15, 2023
Country United States
State Alaska
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