topic Re: when i am using surface volume tool the volume is very very small . i don't know in which units they are shown also. if the volume shown is in the same units as the coordinates then the coordinates i used is WGS_1984. what am i doing wrong ? PLZ help in Water Resources Questions https://community.esri.com/t5/water-resources-questions/when-i-am-using-surface-volume-tool-the-volume-is/m-p/118641#M536 <HTML><HEAD></HEAD><BODY><P>You need to use projected data if you want any meaningful values.&nbsp; WGS84 is probably a geographic coordinate system with that datum and your values will probably be in square decimal degrees times your height units which is not what you want.&nbsp; Project your coordinates so that you X,Y and Z values are in the same units (aka, meters)</P></BODY></HTML> Sun, 14 May 2017 16:57:15 GMT DanPatterson_Retired 2017-05-14T16:57:15Z when i am using surface volume tool the volume is very very small . i don't know in which units they are shown also. if the volume shown is in the same units as the coordinates then the coordinates i used is WGS_1984. what am i doing wrong ? PLZ help me https://community.esri.com/t5/water-resources-questions/when-i-am-using-surface-volume-tool-the-volume-is/m-p/118640#M535 <HTML><HEAD></HEAD><BODY><P>when i am using surface volume tool the volume is very very small . i don't know in which units they are shown also. if the volume shown is in the same units as the coordinates then the coordinates i used is WGS_1984. what am i doing wrong ? PLZ &nbsp;help me&nbsp;</P></BODY></HTML> Sun, 14 May 2017 13:59:25 GMT https://community.esri.com/t5/water-resources-questions/when-i-am-using-surface-volume-tool-the-volume-is/m-p/118640#M535 RajendraKunwar 2017-05-14T13:59:25Z Re: when i am using surface volume tool the volume is very very small . i don't know in which units they are shown also. if the volume shown is in the same units as the coordinates then the coordinates i used is WGS_1984. what am i doing wrong ? PLZ help https://community.esri.com/t5/water-resources-questions/when-i-am-using-surface-volume-tool-the-volume-is/m-p/118641#M536 <HTML><HEAD></HEAD><BODY><P>You need to use projected data if you want any meaningful values.&nbsp; WGS84 is probably a geographic coordinate system with that datum and your values will probably be in square decimal degrees times your height units which is not what you want.&nbsp; Project your coordinates so that you X,Y and Z values are in the same units (aka, meters)</P></BODY></HTML> Sun, 14 May 2017 16:57:15 GMT https://community.esri.com/t5/water-resources-questions/when-i-am-using-surface-volume-tool-the-volume-is/m-p/118641#M536 DanPatterson_Retired 2017-05-14T16:57:15Z