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Natalia, <br>
<br>
it looks like your tasseled cap transformation of 1988 is off by a
factor of about 10000.<br>
If I calculate it from scratch it is fine:<br>
<br>
a <- brick("raster_data/final/p224r63_1988.grd")<br>
b <- brick("raster_data/final/p224r63_2011.grd")<br>
<br>
ac <- tasseledCap(dropLayer(a, "B6_bt"), sat = "Landsat5TM")<br>
bc <- tasseledCap(dropLayer(b, "B6_bt"), sat = "Landsat5TM")<br>
<br>
rva <- rasterCVA(ac[[1:2]], bc[[1:2]])<br>
<br>
<br>
Best,<br>
Benjamin<br>
<br>
<br>
<div class="moz-cite-prefix">On 14.09.2016 21:16, Natalia Quinteros
wrote:<br>
</div>
<blockquote
cite="mid:CAOZBhq2OGhZ=yKsLji4TYKR14YzMNGnZu9DGo8bF6F0QfQ0aoA@mail.gmail.com"
type="cite">
<div dir="ltr">
<div>Hi List, </div>
<div><br>
</div>
<div>In chapter 9, when attempting a spectral change vector
analysis the rasterCVA gave as an input a blank map. </div>
<div><br>
</div>
<div>changeVec <- rasterCVA(tc2011[[1:2]], tc1988[[1:2]])</div>
<div><br>
</div>
<div>Any ideas why? </div>
<div><br>
</div>
<div>Thanks, </div>
<div><br>
</div>
<div>Natalia</div>
</div>
<br>
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<br>
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</blockquote>
<br>
<pre class="moz-signature" cols="72">--
Benjamin Leutner M.Sc.
PhD candidate
Department of Remote Sensing
University of Wuerzburg
Campus Hubland Nord 86
97074 Wuerzburg, Germany
Tel: +49-(0)931-31 89594
Fax: +49-(0)931-31 89594-0
Email: <a class="moz-txt-link-abbreviated" href="mailto:benjamin.leutner@uni-wuerzburg.de">benjamin.leutner@uni-wuerzburg.de</a>
Web: <a class="moz-txt-link-freetext" href="http://www.fernerkundung.uni-wuerzburg.de">http://www.fernerkundung.uni-wuerzburg.de</a>
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