MODIS tree cover validation for the circumpolar taiga–tundra transition zone
A validation of the 2005 500 m MODIS vegetation continuous fields (VCF) tree cover product in the circumpolar taiga–tundra ecotone was performed using high resolution Quickbird imagery. Assessing the VCF's performance near the northern limits of the boreal forest can help quantify the accuracy...
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| Veröffentlicht in: | Remote sensing of environment 2009-10, Vol.113 (10), p.2130-2141 |
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| creator | Montesano, P.M. Nelson, R. Sun, G. Margolis, H. Kerber, A. Ranson, K.J. |
| description | A validation of the 2005 500
m MODIS vegetation continuous fields (VCF) tree cover product in the circumpolar taiga–tundra ecotone was performed using high resolution Quickbird imagery. Assessing the VCF's performance near the northern limits of the boreal forest can help quantify the accuracy of the product within this vegetation transition area. The circumpolar region was divided into 7 longitudinal zones and validation sites were selected in areas of varying tree cover where Quickbird imagery is available in Google Earth. Each site was linked to the corresponding VCF pixel and overlaid with a regular dot grid within the VCF pixel's boundary to estimate percent tree crown cover in the area. Percent tree crown cover was estimated using Quickbird imagery for 396 sites throughout the circumpolar region and related to the VCF's estimates of canopy cover for 2000–2005. Regression results of VCF inter-annual comparisons (2000–2005) and VCF-Quickbird image-interpreted estimates indicate that: (1) Pixel-level, inter-annual comparisons of VCF estimates of percent canopy cover were linearly related (mean
R
2
=
0.77) and exhibited an average root mean square error (RMSE) of 10.1% and an average root mean square difference (RMSD) of 7.3%. (2) A comparison of image-interpreted percent tree crown cover estimates based on dot counts on Quickbird color images by two different interpreters were more variable (
R
2
=
0.73, RMSE
=
14.8%, RMSD
=
18.7%) than VCF inter-annual comparisons. (3) Across the circumpolar boreal region, 2005 VCF-Quickbird comparisons were linearly related, with an
R
2
=
0.57, a RMSE
=
13.4% and a RMSD
=
21.3%, with a tendency to over-estimate areas of low percent tree cover and anomalous VCF results in Scandinavia. The relationship of the VCF estimates and ground reference indicate to potential users that the VCF's tree cover values for individual pixels, particularly those below 20% tree cover, may not be precise enough to monitor 500
m pixel-level tree cover in the taiga–tundra transition zone. |
| doi_str_mv | 10.1016/j.rse.2009.05.021 |
| format | Article |
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m MODIS vegetation continuous fields (VCF) tree cover product in the circumpolar taiga–tundra ecotone was performed using high resolution Quickbird imagery. Assessing the VCF's performance near the northern limits of the boreal forest can help quantify the accuracy of the product within this vegetation transition area. The circumpolar region was divided into 7 longitudinal zones and validation sites were selected in areas of varying tree cover where Quickbird imagery is available in Google Earth. Each site was linked to the corresponding VCF pixel and overlaid with a regular dot grid within the VCF pixel's boundary to estimate percent tree crown cover in the area. Percent tree crown cover was estimated using Quickbird imagery for 396 sites throughout the circumpolar region and related to the VCF's estimates of canopy cover for 2000–2005. Regression results of VCF inter-annual comparisons (2000–2005) and VCF-Quickbird image-interpreted estimates indicate that: (1) Pixel-level, inter-annual comparisons of VCF estimates of percent canopy cover were linearly related (mean
R
2
=
0.77) and exhibited an average root mean square error (RMSE) of 10.1% and an average root mean square difference (RMSD) of 7.3%. (2) A comparison of image-interpreted percent tree crown cover estimates based on dot counts on Quickbird color images by two different interpreters were more variable (
R
2
=
0.73, RMSE
=
14.8%, RMSD
=
18.7%) than VCF inter-annual comparisons. (3) Across the circumpolar boreal region, 2005 VCF-Quickbird comparisons were linearly related, with an
R
2
=
0.57, a RMSE
=
13.4% and a RMSD
=
21.3%, with a tendency to over-estimate areas of low percent tree cover and anomalous VCF results in Scandinavia. The relationship of the VCF estimates and ground reference indicate to potential users that the VCF's tree cover values for individual pixels, particularly those below 20% tree cover, may not be precise enough to monitor 500
m pixel-level tree cover in the taiga–tundra transition zone.</description><identifier>ISSN: 0034-4257</identifier><identifier>EISSN: 1879-0704</identifier><identifier>DOI: 10.1016/j.rse.2009.05.021</identifier><identifier>CODEN: RSEEA7</identifier><language>eng</language><publisher>New York, NY: Elsevier Inc</publisher><subject>Animal, plant and microbial ecology ; Applied geophysics ; Biological and medical sciences ; Circumpolar ; Earth sciences ; Earth, ocean, space ; Ecotone ; Exact sciences and technology ; Fundamental and applied biological sciences. Psychology ; General aspects. Techniques ; Internal geophysics ; MODIS ; Taiga ; Teledetection and vegetation maps ; Transition ; Tree cover ; Tundra ; Validation</subject><ispartof>Remote sensing of environment, 2009-10, Vol.113 (10), p.2130-2141</ispartof><rights>2009 Elsevier Inc.</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c432t-665a9dcc9d266a34efff81319c5d64d758533d2de40a70421e67cfa0ea60d4303</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.rse.2009.05.021$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,778,782,3539,27913,27914,45984</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=21834588$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Montesano, P.M.</creatorcontrib><creatorcontrib>Nelson, R.</creatorcontrib><creatorcontrib>Sun, G.</creatorcontrib><creatorcontrib>Margolis, H.</creatorcontrib><creatorcontrib>Kerber, A.</creatorcontrib><creatorcontrib>Ranson, K.J.</creatorcontrib><title>MODIS tree cover validation for the circumpolar taiga–tundra transition zone</title><title>Remote sensing of environment</title><description>A validation of the 2005 500
m MODIS vegetation continuous fields (VCF) tree cover product in the circumpolar taiga–tundra ecotone was performed using high resolution Quickbird imagery. Assessing the VCF's performance near the northern limits of the boreal forest can help quantify the accuracy of the product within this vegetation transition area. The circumpolar region was divided into 7 longitudinal zones and validation sites were selected in areas of varying tree cover where Quickbird imagery is available in Google Earth. Each site was linked to the corresponding VCF pixel and overlaid with a regular dot grid within the VCF pixel's boundary to estimate percent tree crown cover in the area. Percent tree crown cover was estimated using Quickbird imagery for 396 sites throughout the circumpolar region and related to the VCF's estimates of canopy cover for 2000–2005. Regression results of VCF inter-annual comparisons (2000–2005) and VCF-Quickbird image-interpreted estimates indicate that: (1) Pixel-level, inter-annual comparisons of VCF estimates of percent canopy cover were linearly related (mean
R
2
=
0.77) and exhibited an average root mean square error (RMSE) of 10.1% and an average root mean square difference (RMSD) of 7.3%. (2) A comparison of image-interpreted percent tree crown cover estimates based on dot counts on Quickbird color images by two different interpreters were more variable (
R
2
=
0.73, RMSE
=
14.8%, RMSD
=
18.7%) than VCF inter-annual comparisons. (3) Across the circumpolar boreal region, 2005 VCF-Quickbird comparisons were linearly related, with an
R
2
=
0.57, a RMSE
=
13.4% and a RMSD
=
21.3%, with a tendency to over-estimate areas of low percent tree cover and anomalous VCF results in Scandinavia. The relationship of the VCF estimates and ground reference indicate to potential users that the VCF's tree cover values for individual pixels, particularly those below 20% tree cover, may not be precise enough to monitor 500
m pixel-level tree cover in the taiga–tundra transition zone.</description><subject>Animal, plant and microbial ecology</subject><subject>Applied geophysics</subject><subject>Biological and medical sciences</subject><subject>Circumpolar</subject><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Ecotone</subject><subject>Exact sciences and technology</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>General aspects. Techniques</subject><subject>Internal geophysics</subject><subject>MODIS</subject><subject>Taiga</subject><subject>Teledetection and vegetation maps</subject><subject>Transition</subject><subject>Tree cover</subject><subject>Tundra</subject><subject>Validation</subject><issn>0034-4257</issn><issn>1879-0704</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><recordid>eNqFkE1uFDEQRi0EEkPIAbLrTdh1U_7vVlZRCBApkAWwtkp2deJRT3ti94wEK-7ADTkJTiZiCSur5Pd9VXqMnXDoOHDzdt3lQp0AGDrQHQj-jK14b4cWLKjnbAUgVauEti_Zq1LWAFz3lq_Y5083766-NEsmanzaU272OMWAS0xzM6bcLHf1I2a_22zThHXGeIu_f_5adnPIWIM4l_hI_0gzvWYvRpwKHT-9R-zb-8uvFx_b65sPVxfn161XUiytMRqH4P0QhDEoFY3j2HPJB6-DUcHqXksZRCAFWO8XnIz1IwKhgaAkyCP25tC7zel-R2Vxm1g8TRPOlHbFSWUt9IP-LyjAGiEfG_kB9DmVkml02xw3mL87Du5BsVu7qtg9KHagXVVcM6dP5Vg8TmN14WP5GxS8l0r3feXODhxVJftI2RUfafYUYia_uJDiP7b8ATmqkfY</recordid><startdate>20091001</startdate><enddate>20091001</enddate><creator>Montesano, P.M.</creator><creator>Nelson, R.</creator><creator>Sun, G.</creator><creator>Margolis, H.</creator><creator>Kerber, A.</creator><creator>Ranson, K.J.</creator><general>Elsevier Inc</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SN</scope><scope>7ST</scope><scope>C1K</scope><scope>SOI</scope><scope>8FD</scope><scope>FR3</scope><scope>H8D</scope><scope>KR7</scope><scope>L7M</scope></search><sort><creationdate>20091001</creationdate><title>MODIS tree cover validation for the circumpolar taiga–tundra transition zone</title><author>Montesano, P.M. ; Nelson, R. ; Sun, G. ; Margolis, H. ; Kerber, A. ; Ranson, K.J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c432t-665a9dcc9d266a34efff81319c5d64d758533d2de40a70421e67cfa0ea60d4303</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2009</creationdate><topic>Animal, plant and microbial ecology</topic><topic>Applied geophysics</topic><topic>Biological and medical sciences</topic><topic>Circumpolar</topic><topic>Earth sciences</topic><topic>Earth, ocean, space</topic><topic>Ecotone</topic><topic>Exact sciences and technology</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>General aspects. Techniques</topic><topic>Internal geophysics</topic><topic>MODIS</topic><topic>Taiga</topic><topic>Teledetection and vegetation maps</topic><topic>Transition</topic><topic>Tree cover</topic><topic>Tundra</topic><topic>Validation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Montesano, P.M.</creatorcontrib><creatorcontrib>Nelson, R.</creatorcontrib><creatorcontrib>Sun, G.</creatorcontrib><creatorcontrib>Margolis, H.</creatorcontrib><creatorcontrib>Kerber, A.</creatorcontrib><creatorcontrib>Ranson, K.J.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Ecology Abstracts</collection><collection>Environment Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Environment Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Remote sensing of environment</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Montesano, P.M.</au><au>Nelson, R.</au><au>Sun, G.</au><au>Margolis, H.</au><au>Kerber, A.</au><au>Ranson, K.J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>MODIS tree cover validation for the circumpolar taiga–tundra transition zone</atitle><jtitle>Remote sensing of environment</jtitle><date>2009-10-01</date><risdate>2009</risdate><volume>113</volume><issue>10</issue><spage>2130</spage><epage>2141</epage><pages>2130-2141</pages><issn>0034-4257</issn><eissn>1879-0704</eissn><coden>RSEEA7</coden><abstract>A validation of the 2005 500
m MODIS vegetation continuous fields (VCF) tree cover product in the circumpolar taiga–tundra ecotone was performed using high resolution Quickbird imagery. Assessing the VCF's performance near the northern limits of the boreal forest can help quantify the accuracy of the product within this vegetation transition area. The circumpolar region was divided into 7 longitudinal zones and validation sites were selected in areas of varying tree cover where Quickbird imagery is available in Google Earth. Each site was linked to the corresponding VCF pixel and overlaid with a regular dot grid within the VCF pixel's boundary to estimate percent tree crown cover in the area. Percent tree crown cover was estimated using Quickbird imagery for 396 sites throughout the circumpolar region and related to the VCF's estimates of canopy cover for 2000–2005. Regression results of VCF inter-annual comparisons (2000–2005) and VCF-Quickbird image-interpreted estimates indicate that: (1) Pixel-level, inter-annual comparisons of VCF estimates of percent canopy cover were linearly related (mean
R
2
=
0.77) and exhibited an average root mean square error (RMSE) of 10.1% and an average root mean square difference (RMSD) of 7.3%. (2) A comparison of image-interpreted percent tree crown cover estimates based on dot counts on Quickbird color images by two different interpreters were more variable (
R
2
=
0.73, RMSE
=
14.8%, RMSD
=
18.7%) than VCF inter-annual comparisons. (3) Across the circumpolar boreal region, 2005 VCF-Quickbird comparisons were linearly related, with an
R
2
=
0.57, a RMSE
=
13.4% and a RMSD
=
21.3%, with a tendency to over-estimate areas of low percent tree cover and anomalous VCF results in Scandinavia. The relationship of the VCF estimates and ground reference indicate to potential users that the VCF's tree cover values for individual pixels, particularly those below 20% tree cover, may not be precise enough to monitor 500
m pixel-level tree cover in the taiga–tundra transition zone.</abstract><cop>New York, NY</cop><pub>Elsevier Inc</pub><doi>10.1016/j.rse.2009.05.021</doi><tpages>12</tpages><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0034-4257 |
| ispartof | Remote sensing of environment, 2009-10, Vol.113 (10), p.2130-2141 |
| issn | 0034-4257 1879-0704 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_34770895 |
| source | ScienceDirect Journals (5 years ago - present) |
| subjects | Animal, plant and microbial ecology Applied geophysics Biological and medical sciences Circumpolar Earth sciences Earth, ocean, space Ecotone Exact sciences and technology Fundamental and applied biological sciences. Psychology General aspects. Techniques Internal geophysics MODIS Taiga Teledetection and vegetation maps Transition Tree cover Tundra Validation |
| title | MODIS tree cover validation for the circumpolar taiga–tundra transition zone |
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