Validating the use of object-based image analysis to map commonly-recognized landform features in the United States

Cartography and Geographic Information Science
By:  and 

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Abstract

The U.S. Geological Survey (USGS) National Geospatial Program (NGP) seeks to i) create semantically-accessible terrain features from the pixel-based 3D Elevation Program (3DEP) data, and ii) enhance the usability of the USGS Geographic Names Information System (GNIS) by associating boundaries with GNIS features whose spatial representation is currently limited to 2D point locations. Geographic object-based image analysis (GEOBIA) was determined to be a promising method to approach both goals. An existing GEOBIA workflow was modified and the resulting segmented objects and terrain categories tested for a strategically chosen physiographic province in the mid-western US, the Ozark Plateaus. The chi-squared test of independence confirmed that there is significant overall spatial association between terrain categories of the GEOBIA and GNIS feature classes. Contingency table analysis also suggests strong category-specific associations between select GNIS and GEOBIA classes. However, 3D visual analysis revealed that GEOBIA objects resembled segmented regions more than they did individual landform objects, with their boundaries often failing to correspond to match what people would likely perceive as landforms. Still, objects derived through GEOBIA can provide initial baseline landscape divisions that can improve the efficiency of more specialized feature extraction methods.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Validating the use of object-based image analysis to map commonly-recognized landform features in the United States
Series title Cartography and Geographic Information Science
DOI 10.1080/15230406.2018.1526652
Volume 46
Issue 5
Year Published 2019
Language English
Publisher Taylor and Francis
Contributing office(s) Center for Geospatial Information Science (CEGIS)
Description 15 p.
First page 441
Last page 455