Jianting Zhang Associate Professor in Geographical Information System (GIS) and Computer Science Affiliations: CS@CUNY City College (Primary) CS@CUNY Graduate Center,  NOAA-CREST,  UTRC, CCSI@ORNL (through DOE VFP) Geospatial Technologies and Environmental Cyberinfrastructure (GeoTECI) Lab NSF IIS-Medium Collaborative: Spaital Data and Trajectory Data Managment on GPUs

Facutly Profile[Education/Training] [Professional Experiences] [Courses] [Contact Info]

GeoTECI Lab [Overview (9 slides)] [Students] [Archieved News]

Recent News:
[08/20/2014] A brief introduction to my research and my group (GeoTECI lab at CCNY) with 9 slides is added.
[12/10/2014] I was a recipient of the CUNY Certificate of Recognition for the year 2014.  
[03/11/2015] GeoTECI Ph.D. Student Simin You has released his SpatialSpark source code at GitHub [Link]. The related CloudDM'15 paper can be found here.
[04/02/2015] A summary of our work on GPU-based geospatial processing over the past five years (2009-2014) entitled "Large-Scale Spatial Data Processing on GPUs and GPU-Accelerated Clusters" appeared at the ACM SIGSPATIAL Special as an invited paper. Click here for a local copy. 
[07/03/2015] We have released the source code of our ISP prototypes (including ISP-MC, ISP-MC+ and ISP-GPU). Click here for the code and here for the HardBD'15 paper as a high level documentation. It has been a very tough yet pleasant journey to learn advanced features of Impala and integrate our single node data parallel spatial indexing and spatial join techniques (on GPUs as well as multi-core CPUs) into Cloudera  Impala. The learnt experiences and lessons lead us to the design and implementation of LDE as a succession to ISP.
[12/29/2015] GeoTECI Ph.D. Student Simin You has successfully defended his dissertation on 11/30/2015 and completed all the procedures for graduation recently. The PDF file of Dr. You's dissertation, entitled "Large-scale spatial data management on modern parallel and distributed platforms", can be downloaded here (139 pages). Congratulations!

[05/2019] Haidar Alanbari completed his Master Thesis entitled "Integrating Multi-Source Weather Data for Deep Learning". Congratulations!
[12/2019] Yamile Patino Vargas completed her Master Thesis entitled "Towards Improving Accuracy and Interpretability of Deep Learning based on Satellite Image Classification". Congratulations!

[03/28/2020] As part of my work at Nvidia as a Visiting Professor, I have added quadtree-based indexing on large-scale point data and point-in-polygon-test based spatial join modules to cuSpatial. The open source code is at my GitHub page here. The code will be merged to official cuSpatial release after code review. I encourage visiting the NYC taxi trip experiment code [cpp/tests/join/spatial_join_nyctaxi_test.cu] to see 10^4 speedup over GDAL implementation on CPUs.

Research Interests

· High-Performance Geospatial Computing (HPC-G)

· Spatial Databases (SDB) and GIS Applications (GIS)

· Environmental Cyberinfrastructure (CI)

· Geospatial Visual Analytics (GVA)

· Multispectral and Hyperspectral Remote Sensing Data Processing (RS)

Publication (DBLP)

        · By Year: 2017, 2016, 2015, 2014, 2013, 2012, 2011, 2010 2009, 2008,
2007, 2006, 2005, 2004, 2003, 2002, 2001, 2000, 1999, 1998, 1997

Research Initiatives and Exploratory Projects [Funded Projects] (* source code available)

· High-Performance Geospatial Computing on GPGPUs [HPC-G (Position Paper-2010)]
  (1) Non-Query Spatial Operations: [NNI-DEM][Polygon Rasterization]

(2) Spatial Indexing: [BMMQ-Tree*] [BQ-Tree*][Point-Quadtree*][R-Tree*] [MA-Quadtree for Indexing Polygon Internals]

(3) End-to-End Systems for Spatial Joins (10-40X over in-memory systems and 3-4 orders of speedups over disk-resident systems)
                             [Point to Netwfork][Point in Polygon][Point to Polygon][Trajectory to Trajectory]
                        (4) From Single-Node to Distributed Clusters: [SpatialSpark*][ISP* (MC, MC+, GPU)] [LDE]

(5) In-Progress (Algorithms): [Selectivity Estimation] [Polygon to Polygon Join (Overlay)]
                        (6) In-Progress (Systems) [Spatial SQL Front-end] [Hybrid CPU-GPU Systems]

· Managing Large-Scale  OD/Trajectory Data with Applications to Data Mining of Traffic and Travel Patterns
[U²SOD-DB] [U²SOD-VA][NYC Case Studies] [Frequent Sequence Mining using Shortcuts]

· Managing Large-Scale Environmental and Species Distribution Data with Applications to Understanding Global and Regional Biodiversity Patterns  [Visual Explorations of Rasters] [USGS Little Tree Range Map] [NatureServe Bird Range Map in DBMSs] [Lightweight Compression for Rasters*] [Zonal Summation of GBIF Data on GPUs*]