Remote sensing of giant salvinia in Texas waterways
Giant salvinia (Salvinia molesta Mitchell) is an invasive aquatic fern that has been discovered at several locations in southeast Texas. Field reflectance measurements were made on two classes of giant salvinia [green giant salvinia (green foliage) and senesced giant salvinia (mixture of green and brown foliage)] and several associated species. Reflectance measurements showed that green giant salvinia could be best distinguished at the visible green wavelength, whereas senesced giant salvinia could generally be best separated at the near-infrared (NIR) wavelength. Green giant salvinia and senesced giant salvinia could be detected on color-infrared (CIR) aerial photographs where them had pink and grayish-pink or olive-green image responses, respectively. Both classes of giant salvinia could be distinguished in reflectance measurements made on multiple dates and at several locations in southeast Texas. Likewise, they could he detected in CIR photographs obtained on several dates and at widely separated locations. Computer analysis of a CIR photographic transparency showed that green giant salvinia and senesced giant salvinia populations could he quantified. An accuracy assessment performed on the classified image showed an overall accuracy of 87.0%.
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Format: | article biblioteca |
Language: | English |
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2002
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Subjects: | Ecology, Management, Biology, Environment, Light reflectance, color-infrared photography, accuracy assessment, Salvinia molesta, |
Online Access: | http://hdl.handle.net/1834/19599 |
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dig-aquadocs-1834-195992021-07-10T02:00:56Z Remote sensing of giant salvinia in Texas waterways Everitt, J.H. Yang, C. Helton, R.J. Hartmann, R.H. Davis, M.R. Ecology Management Biology Environment Light reflectance color-infrared photography accuracy assessment Salvinia molesta Giant salvinia (Salvinia molesta Mitchell) is an invasive aquatic fern that has been discovered at several locations in southeast Texas. Field reflectance measurements were made on two classes of giant salvinia [green giant salvinia (green foliage) and senesced giant salvinia (mixture of green and brown foliage)] and several associated species. Reflectance measurements showed that green giant salvinia could be best distinguished at the visible green wavelength, whereas senesced giant salvinia could generally be best separated at the near-infrared (NIR) wavelength. Green giant salvinia and senesced giant salvinia could be detected on color-infrared (CIR) aerial photographs where them had pink and grayish-pink or olive-green image responses, respectively. Both classes of giant salvinia could be distinguished in reflectance measurements made on multiple dates and at several locations in southeast Texas. Likewise, they could he detected in CIR photographs obtained on several dates and at widely separated locations. Computer analysis of a CIR photographic transparency showed that green giant salvinia and senesced giant salvinia populations could he quantified. An accuracy assessment performed on the classified image showed an overall accuracy of 87.0%. 2021-06-24T15:12:08Z 2021-06-24T15:12:08Z 2002 article TRUE http://hdl.handle.net/1834/19599 en http://www.apms.org/japm/vol40/v40p11.pdf application/pdf application/pdf 11-16 http://aquaticcommons.org/id/eprint/1747 200 2011-09-29 20:10:07 1747 Aquatic Plant Management Society, Inc. |
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Ecology Management Biology Environment Light reflectance color-infrared photography accuracy assessment Salvinia molesta Ecology Management Biology Environment Light reflectance color-infrared photography accuracy assessment Salvinia molesta |
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Ecology Management Biology Environment Light reflectance color-infrared photography accuracy assessment Salvinia molesta Ecology Management Biology Environment Light reflectance color-infrared photography accuracy assessment Salvinia molesta Everitt, J.H. Yang, C. Helton, R.J. Hartmann, R.H. Davis, M.R. Remote sensing of giant salvinia in Texas waterways |
description |
Giant salvinia (Salvinia molesta Mitchell) is an invasive aquatic fern that has been discovered at several locations in southeast Texas. Field reflectance measurements were made on two classes of giant salvinia [green giant salvinia (green foliage) and senesced giant salvinia (mixture of green and brown foliage)] and several associated species. Reflectance measurements showed that green giant salvinia could be best distinguished at the visible green wavelength, whereas senesced giant salvinia could generally be best separated at the near-infrared (NIR) wavelength. Green giant salvinia and senesced giant salvinia could be detected on color-infrared (CIR) aerial photographs where them had pink and grayish-pink or olive-green image responses, respectively. Both classes of giant salvinia could be distinguished in reflectance measurements made on multiple dates and at several locations in southeast Texas. Likewise, they could he detected in CIR photographs obtained on several dates and at widely separated locations. Computer analysis of a CIR photographic transparency showed that green giant salvinia and senesced giant salvinia populations could he quantified. An accuracy assessment performed on the classified image showed an overall accuracy of 87.0%. |
format |
article |
topic_facet |
Ecology Management Biology Environment Light reflectance color-infrared photography accuracy assessment Salvinia molesta |
author |
Everitt, J.H. Yang, C. Helton, R.J. Hartmann, R.H. Davis, M.R. |
author_facet |
Everitt, J.H. Yang, C. Helton, R.J. Hartmann, R.H. Davis, M.R. |
author_sort |
Everitt, J.H. |
title |
Remote sensing of giant salvinia in Texas waterways |
title_short |
Remote sensing of giant salvinia in Texas waterways |
title_full |
Remote sensing of giant salvinia in Texas waterways |
title_fullStr |
Remote sensing of giant salvinia in Texas waterways |
title_full_unstemmed |
Remote sensing of giant salvinia in Texas waterways |
title_sort |
remote sensing of giant salvinia in texas waterways |
publishDate |
2002 |
url |
http://hdl.handle.net/1834/19599 |
work_keys_str_mv |
AT everittjh remotesensingofgiantsalviniaintexaswaterways AT yangc remotesensingofgiantsalviniaintexaswaterways AT heltonrj remotesensingofgiantsalviniaintexaswaterways AT hartmannrh remotesensingofgiantsalviniaintexaswaterways AT davismr remotesensingofgiantsalviniaintexaswaterways |
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1756077252233134080 |