Abstract
Accurate and high-resolution maps of vegetation are critical for projects seeking to understand the terrestrial ecosystem processes and land-atmosphere interactions in Arctic ecosystems, such as U.S. Department of Energy's Next Generation Ecosystem Experiment (NGEE) Arctic. However, most existing Arctic vegetation maps are at a coarse resolution and with a varying degree of detail and accuracy. Remote sensing-based approaches for mapping vegetation, while promising, are challenging in high latitude environments due to frequent cloud cover, polar darkness, and limited availability of high-resolution remote sensing datasets (e.g., ∼ 5 m). This study proposes a new remote sensing based multi-sensor data fusion approach for developing high-resolution maps of vegetation in the Seward Peninsula, Alaska. We focus detailed analysis and validation study around the Kougarok river, located in the central Seward Peninsula of Alaska. We seek to evaluate the integration of hyper-spectral, multi-spectral, radar, and terrain datasets using unsupervised and supervised classification techniques over a ∼343.72 km 2 area for generating vegetation classifications at a variety of resolutions (5 m and 12.5 m). We fist applied a quantitative goodness-of-fit method, called Mapcurves, that shows the degree of spatial concordance between the public coarse resolution maps and k-means clustering values and relabels the k values based on the best overlap. We develop a convolutional neural network (CNN) approach for developing high resolution vegetation maps for our study region in Arctic. We compare two CNN approaches: (1) breaking up the images into small patches (e.g., 6 x 6) and predict the vegetation class for entire patch and (2) semantic segmentation and predict the vegetation class for every pixel. We also perform accuracy assessments of the developed data products and evaluate varying CNN architectures. The fusion of hyperspectral and optical datasets performed the best, with accuracy values increased from 0.64 to 0.96-0.97 when using a training map produced by unsupervised clustering and Mapcurves labeling for both CNN models.
Original language | English |
---|---|
Title of host publication | Proceeding - 17th IEEE International Conference on Data Mining Workshops, ICDMW 2017 |
Editors | Raju Gottumukkala, George Karypis, Vijay Raghavan, Xindong Wu, Lucio Miele, Srinivas Aluru, Xia Ning, Guozhu Dong |
Publisher | IEEE Computer Society |
Pages | 322-331 |
Number of pages | 10 |
ISBN (Electronic) | 9781538614808 |
DOIs | |
State | Published - Dec 15 2017 |
Event | 17th IEEE International Conference on Data Mining Workshops, ICDMW 2017 - New Orleans, United States Duration: Nov 18 2017 → Nov 21 2017 |
Publication series
Name | IEEE International Conference on Data Mining Workshops, ICDMW |
---|---|
Volume | 2017-November |
ISSN (Print) | 2375-9232 |
ISSN (Electronic) | 2375-9259 |
Conference
Conference | 17th IEEE International Conference on Data Mining Workshops, ICDMW 2017 |
---|---|
Country/Territory | United States |
City | New Orleans |
Period | 11/18/17 → 11/21/17 |
Funding
The Next Generation Ecosystem Experiments (NGEE) Arctic project (http://ngee-arctic.ornl.gov/) is supported by the Office of Biological and Environmental Research in Department of Energy Office of Science. This manuscript has been authored by UT-Battelle,LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan).
Keywords
- Fusion
- Multi-Sensor
- Remote Sensing
- Vegetation Classificaiton