topic Re: Image Analysis/Remote Sensing Question in Data Management Questions https://community.esri.com/t5/data-management-questions/image-analysis-remote-sensing-question/m-p/279922#M16085 <HTML><HEAD></HEAD><BODY><SPAN>Not sure if you found an answer to your question yet...</SPAN><BR /><BR /><SPAN>I'm no "expert", but I would assume that along with algal growth, there could be other reasons for changes in colour like amout or angle of light, depth, pollution... I'm sure the list goes on.&nbsp; </SPAN><BR /><BR /><SPAN>Found </SPAN><A class="jive-link-external-small" href="http://www.lakescientist.com/learn-about-lakes/how-lakes-differ/lake-color.html" rel="nofollow" target="_blank">this</A><SPAN> webpage, not sure how reliable it is...&nbsp; Hope it's helpful!</SPAN><BR /><BR /><SPAN>T</SPAN></BODY></HTML> Mon, 28 May 2012 15:52:23 GMT TrenahHallgrimson 2012-05-28T15:52:23Z Image Analysis/Remote Sensing Question https://community.esri.com/t5/data-management-questions/image-analysis-remote-sensing-question/m-p/279921#M16084 <HTML><HEAD></HEAD><BODY><SPAN>I have a CIR Image from the GeoEye-1 Satellite. In this image it shows some waterways in the color purple or violet. Others are black or dark blue. In the same image, but True Color, the same waterways are bright green or dark green/brownish. Question:</SPAN><BR /><BR /><SPAN>- When looking at water in a remote sensing CIR image, what does it mean if the water color is purple or violet?</SPAN><BR /><BR /><SPAN>I would assume it is a high level of algae because there is very little circulation in these water bodies.</SPAN></BODY></HTML> Thu, 17 May 2012 17:31:45 GMT https://community.esri.com/t5/data-management-questions/image-analysis-remote-sensing-question/m-p/279921#M16084 TimHayes 2012-05-17T17:31:45Z Re: Image Analysis/Remote Sensing Question https://community.esri.com/t5/data-management-questions/image-analysis-remote-sensing-question/m-p/279922#M16085 <HTML><HEAD></HEAD><BODY><SPAN>Not sure if you found an answer to your question yet...</SPAN><BR /><BR /><SPAN>I'm no "expert", but I would assume that along with algal growth, there could be other reasons for changes in colour like amout or angle of light, depth, pollution... I'm sure the list goes on.&nbsp; </SPAN><BR /><BR /><SPAN>Found </SPAN><A class="jive-link-external-small" href="http://www.lakescientist.com/learn-about-lakes/how-lakes-differ/lake-color.html" rel="nofollow" target="_blank">this</A><SPAN> webpage, not sure how reliable it is...&nbsp; Hope it's helpful!</SPAN><BR /><BR /><SPAN>T</SPAN></BODY></HTML> Mon, 28 May 2012 15:52:23 GMT https://community.esri.com/t5/data-management-questions/image-analysis-remote-sensing-question/m-p/279922#M16085 TrenahHallgrimson 2012-05-28T15:52:23Z