The OpenTopography team consists of staff from the Advanced CyberInfrastructure Development (ACID) group at the San Diego Supercomputer Center at UCSD, UNAVCO and the Active Tectonics, Quantitative Structural Geology and Geomorphology group at Arizona State University. OpenTopography also receives guidance from a six member Advisory Committee composed of a diverse group of researchers.


NandigamViswanath Nandigam
Project PI & Technical Lead
SDSC, UC San Diego
viswanat (at)

Vishu Nandigam is the project PI and chief software architect for the OpenTopography Facility. He is the associate director of the Advanced CyberInfrastructure Development (ACID) lab at the San Diego Supercomputer Center at UCSD where he works on several data intensive CyberInfrastructure projects. He has been involved with the development of OpenTopography (formerly known as the GEON Lidar Workflow) since its inception. His research interests include scientific data acquisition and management, data intensive application development, parallel and federated database systems and information integration.


RamonJ. Ramon Arrowsmith
Project Co-I
ramon.arrowsmith (at)

Ramon Arrowsmith is a Professor of Geology at Arizona State University, and conducts research in active tectonics, quantitative structural geology and geomorphology. These include paleoseismology, earthquake geology, theoretical studies of faulting and hillslope development, and Quaternary Geology and desert surface processes. Active areas of geographic concentration include the San Andreas Fault system, Arizona, central Asia, Xinjiang China, Baja California, and the Afar region of Ethiopia (for the geologic context of paleoanthropologic studies). He was an original PI on the GEON project and pushed early prototype development of the GEON Lidar Workflow, the predecessor to OpenTopography.


Chris Crosby
Project Co-I & Manager
crosby (at)

Chris Crosby manages day-to-day operations of the OpenTopography Facility. Trained as a geologist, he has worked on paleoseismology, earthquake geology, and active tectonics research in the western US, Caribbean, and Central Asia. He is interested in utilization of cyberinfrastructure to manage and improve access to earth science data and processing tools. Chris is an expert in the management, distribution, processing, and application of high-resolution topography acquired via LIDAR (Light Detection and Ranging) technology and has guided the development of OpenTopography (formerly known as the GEON Lidar Workflow) since its inception. In addition to his work on OpenTopography, Chris also manages Geodetic Imaging (Terrestrial Laser Scanning (TLS) and Synthetic Aperture Radar (SAR)) at UNAVCO in Boulder, CO.


Matt LancasterMatt Lancaster
Data Engineer
lancaster (at)

As a data engineer on the OpenTopography team at UNAVCO, Matt is responsible for data ingest and quality control of Lidar datasets published by OpenTopography. As a geologist his interests include seismology, active tectonics of North America, terrain modeling, and facilitation of earth science research through data management. He has been involved with Lidar data since 2015, having processed point cloud data for utilities management and for construction of digital elevation models.


LinKai Lin
Research Programmer
SDSC, UC San Diego
klin (at)

Dr. Lin is a researcher in the advanced cyberinfrastructure development group at the San Diego Supercomputer Center. He has a Ph.D. in Computer Science from the University of California, San Diego. Dr. Lin’s current research interests include databases, data management, cyberinfrastructure, geoinformatics, and software engineering.


MinhMinh Phan
Software Developer
SDSC, UC San Diego

Minh Phan is a software developer for the OpenTopography Project. Minh specializes in web and database related development, and is also interested in software engineering. He has been involved in several Cyberinfrastructure projects including Webshaker (2000-2002), Health Monitoring of Highway Bridges and Civil Infrastructure (2002-2007), NEESit: Network Earthquake Engineering Simulation Cyber Infrastructure (2007-2010).


Chelsea ScottChelsea Scott
Postdoctoral Scholar
cpscott1 (at)

Chelsea Scott is a postdoctoral scholar at Arizona State University. She conducts research in active tectonics, geophysics, and structural geology with study areas in the western US, Japan and South America. She is particularly interested in developing topographic differening techniques to image near-fault surface deformation. Scott earned her PhD from Cornell University where her doctoral research focused on using Synthetic Aperture Radar (SAR) imagery to constrain coseismic surface deformation.


WilliamsAlana Williams
Graduate Researcher

Alana Williams is a graduate student at Arizona State University working with Dr. Ramon Arrowsmith. Alana's academic research interests include applications of lidar data to studies in paleoseismology and active faulting.



Past Team Members

Chaitan Baru - Past PI

Benjamin Gross - Data Engineer

Emily Kleber - Geospatial Data Specialist

Sriram Krishnan PhD - SOA Lead Architect

Newton Alex - Programmer

Efrat Jaeger Frank - Lead Software Developer

Charles Cowart - Programmer Analyst

Jeffery Conner - Software Developer

Kate Kaya - Webmaster