topic Re: Pixel-based classification of glacier in arcmap in ArcGIS Spatial Analyst Questions https://community.esri.com/t5/arcgis-spatial-analyst-questions/pixel-based-classification-of-glacier-in-arcmap/m-p/616718#M8973 <HTML><HEAD></HEAD><BODY><P>as per my last post...it would be useful to see if the bands are showing up in the raster calculator and if so, you should be able to select them and the / to do the math</P></BODY></HTML> Fri, 31 Oct 2014 10:52:49 GMT DanPatterson_Retired 2014-10-31T10:52:49Z Pixel-based classification of glacier in arcmap https://community.esri.com/t5/arcgis-spatial-analyst-questions/pixel-based-classification-of-glacier-in-arcmap/m-p/616713#M8968 <HTML><HEAD></HEAD><BODY><P>I'm having some trouble on how to delineate the glacier area automatically using TM4/TM5 band rations. </P><P>Guess I need to use raster calculator. But I can't seem to get the coding right. </P><P>I want to insert a threshold aswell.</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P> Any suggestions?</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Best regards, Marius</P></BODY></HTML> Thu, 30 Oct 2014 10:45:07 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/pixel-based-classification-of-glacier-in-arcmap/m-p/616713#M8968 mariussmistad 2014-10-30T10:45:07Z Re: Pixel-based classification of glacier in arcmap https://community.esri.com/t5/arcgis-spatial-analyst-questions/pixel-based-classification-of-glacier-in-arcmap/m-p/616714#M8969 <HTML><HEAD></HEAD><BODY><P>what's the coding?</P></BODY></HTML> Thu, 30 Oct 2014 10:58:56 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/pixel-based-classification-of-glacier-in-arcmap/m-p/616714#M8969 DanPatterson_Retired 2014-10-30T10:58:56Z Re: Pixel-based classification of glacier in arcmap https://community.esri.com/t5/arcgis-spatial-analyst-questions/pixel-based-classification-of-glacier-in-arcmap/m-p/616715#M8970 <HTML><HEAD></HEAD><BODY><P><STRONG>The Map Algebra expression I want to run in raster calculator<BR /></STRONG></P><P></P><P><STRONG>Composite band image (band543)</STRONG></P><P><STRONG>Band ratio: TM4/TM5 </STRONG></P><P><STRONG>Threshold: &gt;3</STRONG></P></BODY></HTML> Thu, 30 Oct 2014 11:08:22 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/pixel-based-classification-of-glacier-in-arcmap/m-p/616715#M8970 mariussmistad 2014-10-30T11:08:22Z Re: Pixel-based classification of glacier in arcmap https://community.esri.com/t5/arcgis-spatial-analyst-questions/pixel-based-classification-of-glacier-in-arcmap/m-p/616716#M8971 <HTML><HEAD></HEAD><BODY><P>screen grab the raster calculator...are the bands not showing up or something?</P></BODY></HTML> Thu, 30 Oct 2014 15:02:09 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/pixel-based-classification-of-glacier-in-arcmap/m-p/616716#M8971 DanPatterson_Retired 2014-10-30T15:02:09Z Re: Pixel-based classification of glacier in arcmap https://community.esri.com/t5/arcgis-spatial-analyst-questions/pixel-based-classification-of-glacier-in-arcmap/m-p/616717#M8972 <HTML><HEAD></HEAD><BODY><P>I want to use a ratio&nbsp; (B3/B2) for the composite lanbdsat foto,&nbsp; which has a band combination 5,4,3,&nbsp; and classify pixel values with threshold &gt;2-3. But I do not know how to insert the right expression.</P></BODY></HTML> Fri, 31 Oct 2014 10:36:20 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/pixel-based-classification-of-glacier-in-arcmap/m-p/616717#M8972 mariussmistad 2014-10-31T10:36:20Z Re: Pixel-based classification of glacier in arcmap https://community.esri.com/t5/arcgis-spatial-analyst-questions/pixel-based-classification-of-glacier-in-arcmap/m-p/616718#M8973 <HTML><HEAD></HEAD><BODY><P>as per my last post...it would be useful to see if the bands are showing up in the raster calculator and if so, you should be able to select them and the / to do the math</P></BODY></HTML> Fri, 31 Oct 2014 10:52:49 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/pixel-based-classification-of-glacier-in-arcmap/m-p/616718#M8973 DanPatterson_Retired 2014-10-31T10:52:49Z