Prof. Liping Di Profile

Prof. Liping Di

Director at George Mason Univ

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Author

Publications (12)

SPIE Journal Paper | 5 April 2019

Spatial–temporal landscape pattern change under rapid urbanization

Junmei Tang, Liping Di, Md. Shahinoor Rahman, Zhiqi Yu

JARS, Vol. 13, Issue 02, 024503, (April 2019) https://doi.org/10.1117/12.10.1117/1.JRS.13.024503

KEYWORDS: Earth observing sensors, Satellites, Landsat, Remote sensing, Spatial resolution, Satellite imaging, FDA class I medical device development, Geographic information systems, Vegetation, Data acquisition

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SPIE Journal Paper | 2 November 2018

Large-scale subpixel mapping of landcover from MODIS imagery using the improved spatial attraction model

Lizhen Lu, YanLin Huang, Liping Di, Danwei Hang

JARS, Vol. 12, Issue 04, 046017, (November 2018) https://doi.org/10.1117/12.10.1117/1.JRS.12.046017

KEYWORDS: MODIS, Earth observing sensors, Landsat, Spatial resolution, Image classification, Associative arrays, Vegetation, Scanning probe microscopy, Lutetium, Agriculture

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SPIE Journal Paper | 11 August 2015 Open Access

Special Section Guest Editorial: Remote Sensing and Sensor Networks for Promoting Agro-Geoinformatics

Liping Di, Zhengwei Yang

JARS, Vol. 9, Issue 01, 097001, (August 2015) https://doi.org/10.1117/12.10.1117/1.JRS.9.097001

KEYWORDS: Remote sensing, Sensor networks, Agriculture, Data modeling, MODIS, Backscatter, Error analysis, Injuries, Climate change, Algorithm development

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SPIE Journal Paper | 27 March 2015 Open Access

Threshold model for detecting transparent plastic-mulched landcover using moderate-resolution imaging spectroradiometer time series data: a case study in southern Xinjiang, China

Lizhen Lu, Danwei Hang, Liping Di

JARS, Vol. 9, Issue 01, 097094, (March 2015) https://doi.org/10.1117/12.10.1117/1.JRS.9.097094

KEYWORDS: MODIS, Landsat, Data modeling, Image classification, Reflectivity, Associative arrays, Spatial resolution, Clouds, Agriculture, Earth observing sensors

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Plastic-mulched landcover (PML) is the land surface covered by thin plastic films. PML has been expanding rapidly worldwide and has formed a significant agriculture landscape in the last two decades. Large-scale PML may impact the regional and global climate, ecosystem, and environment because it changes the energy balance and water cycles of the land surfaces, reduces the biodiversity, deteriorates the soil structure, etc. To study its impact, the spatial and temporal distributions and dynamics of PML have to be obtained. This paper presents a threshold model (TM) for PML detection and mapping with moderate-resolution imaging spectroradiometer (MODIS) time series data. Based on the temporal-spectral features of PML in the early stage of a growing season after planting, a TM was designed with the number of days (d) when the normalized difference vegetation index (NDVI) value is larger than a threshold value (x) as the discriminator. The model has been successfully applied to map PML in southern Xinjiang, China, from the interpolated MODIS NDVI time series (from 90th to 125th day of each year). Results indicate that when TM parameter x is set to 0.2 and d to 8, the overall accuracy and kappa coefficient (κ) are >0.84 and 0.65, respectively. We believe this classification accuracy can meet the PML mapping for large geographic areas. Furthermore, visual comparison between the PML maps from TM classification of MODIS time series and that from the maximum likelihood classification of Landsat ETM+ and OLI images shows they are consistent both in the pattern and location of PML. Therefore, detection and mapping of PML by using MODIS time series with the TM method is feasible. The PML mapping in this study used a cropland mask derived from Landsat images using a maximum likelihood classifier to mask out non-cropland when applying the TM algorithm. The accuracy of such a mask is subject to further study. Because of frequent global coverages of MODIS data, the method presented in this paper could potentially be used for PML detecting and mapping at continental and global scales.

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SPIE Journal Paper | 4 February 2015 Open Access

Special Section Guest Editorial: Remote Sensing and Sensor Networks for Promoting Agro-Geoinformatics

Liping Di, Zhengwei Yang

JARS, Vol. 8, Issue 01, 085101, (February 2015) https://doi.org/10.1117/12.10.1117/1.JRS.8.085101

KEYWORDS: Remote sensing, Sensor networks, Agriculture, Clouds, Earth observing sensors, Satellites, Sensors, Feature selection, Dimension reduction, Landsat

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Proceedings Article | 29 December 2008 Paper

Asynchronous OGC web services mechanisms

Min Min, Liping Di, Genong Yu, Nengcheng Chen, Jianya Gong

Proceedings Volume 7285, 72852J (2008) https://doi.org/10.1117/12.815751

KEYWORDS: Web services, Sensors, Data modeling, Standards development, Systems modeling, Telecommunications, Dynamical systems, Data processing, Interfaces, Translucency

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Proceedings Article | 29 December 2008 Paper

Automatic Earth observation data service based on reusable geo-processing workflow

Nengcheng Chen, Liping Di, Jianya Gong, Genong Yu, Min Min

Proceedings Volume 7285, 72852E (2008) https://doi.org/10.1117/12.815690

KEYWORDS: Sensors, Data modeling, Process modeling, Surface plasmons, Web services, Performance modeling, Data processing, Environmental sensing, Flame detectors, Computer security

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Proceedings Article | 3 November 2008 Paper

Visualization of NASA Earth science data in Google Earth

Aijun Chen, Gregory Leptoukh, Steven Kempler, Liping Di

Proceedings Volume 7143, 714329 (2008) https://doi.org/10.1117/12.812610

KEYWORDS: 3D modeling, Visualization, Earth sciences, Curtains, Satellites, Clouds, Earth's atmosphere, Binary data, 3D displays, Image processing

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Proceedings Article | 10 November 2007 Paper

Interoperability middleware for OPeNDAP clients to discover data cataloged in OGC data catalogs

Min Min, Liping Di, Wenli Yang, Peng Yue

Proceedings Volume 6795, 679502 (2007) https://doi.org/10.1117/12.772803

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Proceedings Article | 24 September 2007 Paper

Sensor webs with a service-oriented architecture for on-demand science products

Daniel Mandl, Rob Sohlberg, Chris Justice, Stephen Ungar, Troy Ames, Stuart Frye, Steve Chien, Daniel Tran, Patrice Cappelaere, Linda Derezinski, Granville Paules, Don Sullivan, Liping Di, Stephan Kolitz

Proceedings Volume 6684, 668414 (2007) https://doi.org/10.1117/12.735944

KEYWORDS: Sensors, Satellites, Surface plasmons, Web services, Internet, Web 2.0 technologies, Standards development, Data processing, Received signal strength, MODIS

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Proceedings Article | 14 July 2003 Paper

The dynamics and trend of global peak vegetation activities in the past two decades

Liping Di

Proceedings Volume 4890, (2003) https://doi.org/10.1117/12.465677

KEYWORDS: Vegetation, Satellites, Composites, Error analysis, Aerosols, Climate change, Algorithm development, Sensors, Carbon dioxide, Electroluminescence

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Proceedings Article | 11 June 2003 Paper

Subsetting, georectifying, and reformatting of NASA EOS data through Web

Wenli Yang, Liping Di

Proceedings Volume 4898, (2003) https://doi.org/10.1117/12.467765

KEYWORDS: Data modeling, Data archive systems, Geographic information systems, MODIS, Standards development, Data processing, Binary data, Remote sensing, Data centers, Satellites

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Showing 5 of 12 publications

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