When performing hydrologic and geomorphologic analyses for small area sites, it is desirable to capture terrain data for 3D modeling at higher resolution and lower cost than typical LiDAR imaging provides. This is especially desirable when assessing frequent or detailed terrain changes due to erosion or human activities such as agriculture, development grading, and mining. This paper explores recent advances in the application and effectiveness of relatively low-cost software that relies on modified automatic aerial triangulation techniques for modeling 3D terrain based on overlapping, multiple photographs .