Welcome to the GitHub home of the Digital Terrain Analysis Group (NNU-DTA) at Nanjing Normal University, China, led by Prof. Guoan Tang.
Our team focuses on advancing digital terrain analysis, geomorphological modeling, and GIS theory, with particular attention to the Loess Plateau as a key natural laboratory for landform research.

• Digital Terrain Analysis
  Developing terrain parameters, metrics, and analytical frameworks based on high-resolution DEMs and multi-source geospatial data.

• Geomorphological Evolution and Modeling
  Investigating landform dynamics and surface evolution driven by natural processes and human activities using models and Earth observation data.

• Loess Plateau Geomorphology
  Analyzing the unique geomorphological features, anthropogenic landforms, and environmental impacts in the Chinese Loess Plateau.

• GIS Theory and Methods
  Advancing geographic information science with new algorithms, spatial models, and geospatial technologies.

This organization provides selected open-source tools, datasets, and code repositories, including:

• DEM processing and terrain parameter extraction
• Landform classification method and datasets
• Geomorphological analysis and modeling tools

For more information about our research and publications:
👉 School of Geography, Nanjing Normal University