topic How to write the formula for Enhanced Vegetation Index (EVI) in Raster Calculator? in Data Management Questions https://community.esri.com/t5/data-management-questions/how-to-write-the-formula-for-enhanced-vegetation/m-p/220601#M12548 <HTML><HEAD></HEAD><BODY><SPAN>Hi everyone,</SPAN><BR /><SPAN>I'm trying to derive Enhanced Vegetation Index (EVI) from Landsat 5 TM data using the raster calculator and I can't seem to get the output I want. Here is a link to the description and formula for EVI: </SPAN><BR /><BR /><A href="http://en.wikipedia.org/wiki/Enhanced_vegetation_index">http://en.wikipedia.org/wiki/Enhanced_vegetation_index</A><BR /><BR /><BR /><SPAN>The output should be a raster with values ranging from -1 to 1, but I get values from like 30-40 which is incorrect. </SPAN><BR /><BR /><SPAN>Right now my formula looks like this:</SPAN><BR /><BR /><BR /><SPAN>2.5 * (Float("%Band 4%" - "%Band 3%") / Float("%Band 4%" + 6 * "%Band 3%" - 7.5 *"%Band 1%" + 1))</SPAN><BR /><BR /><BR /><SPAN>Does anyone see something in here that doesn't make sense-- or even better--a formula I could copy/paste?</SPAN><BR /><BR /><SPAN>Thanks!</SPAN></BODY></HTML> Wed, 27 Feb 2013 23:06:42 GMT StephenChignell 2013-02-27T23:06:42Z How to write the formula for Enhanced Vegetation Index (EVI) in Raster Calculator? https://community.esri.com/t5/data-management-questions/how-to-write-the-formula-for-enhanced-vegetation/m-p/220601#M12548 <HTML><HEAD></HEAD><BODY><SPAN>Hi everyone,</SPAN><BR /><SPAN>I'm trying to derive Enhanced Vegetation Index (EVI) from Landsat 5 TM data using the raster calculator and I can't seem to get the output I want. Here is a link to the description and formula for EVI: </SPAN><BR /><BR /><A href="http://en.wikipedia.org/wiki/Enhanced_vegetation_index">http://en.wikipedia.org/wiki/Enhanced_vegetation_index</A><BR /><BR /><BR /><SPAN>The output should be a raster with values ranging from -1 to 1, but I get values from like 30-40 which is incorrect. </SPAN><BR /><BR /><SPAN>Right now my formula looks like this:</SPAN><BR /><BR /><BR /><SPAN>2.5 * (Float("%Band 4%" - "%Band 3%") / Float("%Band 4%" + 6 * "%Band 3%" - 7.5 *"%Band 1%" + 1))</SPAN><BR /><BR /><BR /><SPAN>Does anyone see something in here that doesn't make sense-- or even better--a formula I could copy/paste?</SPAN><BR /><BR /><SPAN>Thanks!</SPAN></BODY></HTML> Wed, 27 Feb 2013 23:06:42 GMT https://community.esri.com/t5/data-management-questions/how-to-write-the-formula-for-enhanced-vegetation/m-p/220601#M12548 StephenChignell 2013-02-27T23:06:42Z