TY - JOUR AU - Amran, Muhammad Anshar PY - 2011/07/19 Y2 - 2024/03/29 TI - ESTIMATION OF SEAGRASS COVERAGE BY DEPTH INVARIANT INDICES ON QUICKBIRD IMAGERY JF - BIOTROPIA JA - BIOTROPIA VL - 17 IS - 1 SE - Research Paper DO - 10.11598/btb.2010.17.1.43 UR - https://journal.biotrop.org/index.php/biotropia/article/view/43 SP - AB - <!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:PunctuationKerning /> <w:ValidateAgainstSchemas /> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:Compatibility> <w:BreakWrappedTables /> <w:SnapToGridInCell /> <w:WrapTextWithPunct /> <w:UseAsianBreakRules /> <w:DontGrowAutofit /> </w:Compatibility> <w:BrowserLevel>MicrosoftInternetExplorer4</w:BrowserLevel> </w:WordDocument> </xml><![endif]--><!--[if gte mso 9]><xml> <w:LatentStyles DefLockedState="false" LatentStyleCount="156"> </w:LatentStyles> </xml><![endif]--><!--[if !mso]><object classid="clsid:38481807-CA0E-42D2-BF39-B33AF135CC4D" id=ieooui></object> <style>st1\:*{behavior:url(#ieooui) }</style> <![endif]--> <!-- /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman";} h4 {mso-style-next:Normal; margin:0cm; margin-bottom:.0001pt; text-align:center; mso-pagination:widow-orphan; page-break-after:avoid; mso-outline-level:4; font-size:12.0pt; font-family:"Times New Roman";} @page Section1 {size:612.0pt 792.0pt; margin:72.0pt 90.0pt 72.0pt 90.0pt; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;} div.Section1 {page:Section1;} --> <!--[if gte mso 10]> <style> /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;}</style> <![endif]--> <h4 style="text-align: justify; text-indent: 21.25pt;"><span style="font-size: 8pt; font-weight: normal;">Management of seagrass ecosystem requires availability of information on the actual condition of seagrass coverage. Remote sensing technology for seagrass mapping has been used to detect the presence of seagrass coverage, <span> </span>but so far no information on the condition of seagrass could be obtained. Therefore, a research is required using remote sensing imagery to obtain information on the condition of seagrass coverage.</span></h4> <p class="MsoNormal" style="text-align: justify; text-indent: 21.25pt;"><span style="font-size: 8pt; color: black;">The aim of this research is to formulate mathematical relationship between seagrass coverage and depth invariant indices on Quickbird imagery. Transformation was done on multispectral bands which could detect sea floor objects that are in the region of blue, green and red bands.</span><span style="font-size: 8pt;"></span></p> <p class="MsoNormal" style="text-align: justify; text-indent: 21.25pt;"><span style="font-size: 8pt; color: black;">The study areas covered are the seas around Barranglompo Island and Barrangcaddi Island, westward of Makassar city, Indonesia. Various seagrass coverages were detected within the region under study.</span><span style="font-size: 8pt;"></span></p> <p class="MsoNormal" style="text-align: justify; text-indent: 21.25pt;"><span style="font-size: 8pt; color: black;">Mathematical relationship between seagrass coverage and depth invariant indices was obtained by multiple linear regression method. Percentage of s</span><span style="font-size: 8pt;" lang="FI">eagrass coverage (C) was obtained by transformation of depth invariant indices (Xij) on Quickbird imagery, with transformation equation as follows:</span><span style="font-size: 8pt;"></span></p> <p class="MsoNormal" style="text-align: center;" align="center"><span style="font-size: 8pt;">C = 19.934 – 63.347 X<sub>12</sub> + 23.239 X<sub>23</sub>.</span><span style="font-size: 8pt;" lang="FI"></span></p> <p class="MsoNormal" style="text-align: justify; text-indent: 21.25pt;"><span style="font-size: 8pt;">A good accuracy of 75% for the seagrass coverage was obtained by</span><span style="font-size: 8pt;" lang="FI"> transformation of depth invariant indices (Xij) on Quickbird imagery.</span></p> <p class="MsoNormal" style="text-align: justify;"><span style="font-size: 8pt;" lang="FI"> </span></p> <p class="MsoNormal" style="text-align: justify;"><strong><span style="font-size: 8pt;">Keywords:</span></strong><span style="font-size: 8pt;"> seagrass coverage, depth invariant index</span><span style="font-size: 8pt;" lang="FI"></span></p> ER -