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Remote Sens. 2016, 8(2), 148; doi:10.3390/rs8020148

IKONOS Image-Based Extraction of the Distribution Area of Stellera chamaejasme L. in Qilian County of Qinghai Province, China

1,2
,
1,* , 3,†
,
1,†
,
1,†
and
1,†
1
College of Urban and Environmental Science, Northwest University, Xi’an 710127, China
2
College of Urban Planning and Landscape Garden, Xuchang University, Xuchang 461000, China
3
Agriculture and Animal Husbandry College, Qinghai University, Xining 810016, China
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editors: Magaly Koch and Prasad S. Thenkabail
Received: 28 November 2015 / Revised: 2 February 2016 / Accepted: 4 February 2016 / Published: 16 February 2016
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Abstract

Stellera chamaejasme L. (S. chamaejasme) is one of the primary toxic grass species (poisonous plants) distributed in the alpine meadows of Qinghai Province, China. In this study, according to the distinctive phenological characteristics of S. chamaejasme, the spectral differences between S. chamaejasme in the full-bloom stage and other pasture grasses were analyzed and the red, blue, and near-infrared bands of IKONOS image were determined as the diagnostic bands of S. chamaejasme recognition. Feature indexes related to S. chamaejasme were established using the diagnostic bands, and \(NDVI_{blue} = (\rho_{nir} − \rho_{blue})/(\rho_{nir} + \rho_{blue})\) obtained as S. chamaejasme sensitive index based on the linear regression analysis between the indexes derived from field spectra and the actual cover fraction of S. chamaejasme communities. The distribution area of S. chamaejasme was extracted by using the index \(NDVI_{blue}\) derived from IKONOS multispectral image in Qilian County of Qinghai Province, China and the verified result reached an overall accuracy of 90.71%. The study indicated that high resolution multispectral satellite images (such as IKONOS images) had significant potential in remote sensing recognition of toxic grass species. View Full-Text
Keywords: Stellera chamaejasme; remote sensing; sensitive index; IKONOS multispectral image; Qilian County of Qinghai Province Stellera chamaejasme; remote sensing; sensitive index; IKONOS multispectral image; Qilian County of Qinghai Province
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Li, J.; Liu, Y.; Mo, C.; Wang, L.; Pang, G.; Cao, M. IKONOS Image-Based Extraction of the Distribution Area of Stellera chamaejasme L. in Qilian County of Qinghai Province, China. Remote Sens. 2016, 8, 148.

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