topic NoData Value in raster interpolation in 3D Questions https://community.esri.com/t5/3d-questions/nodata-value-in-raster-interpolation/m-p/197962#M1235 <HTML><HEAD></HEAD><BODY><SPAN>Hello,</SPAN><BR /><SPAN> </SPAN><BR /><SPAN>Using ArcMap 9.3, I'm trying to interpolate a surface from a shapefile containing precipitation values for various rain gages. The data is monthly, and I'm creating surfaces for one month at a time. </SPAN><BR /><SPAN> </SPAN><BR /><SPAN>Some gages were not functional over the entire time period, so values of -99999 were used to show that is an </SPAN><STRONG>invalid point</STRONG><SPAN> (which needs to be distinguished from valid 0 values). </SPAN><BR /><SPAN> </SPAN><BR /><STRONG>Is there a way to ignore these values</STRONG><SPAN> when using Kriging, IDW, or other interpolation methods? Otherwise, I will get giant valleys in my rasters.</SPAN><BR /><SPAN> </SPAN><BR /><SPAN>Thanks.</SPAN></BODY></HTML> Wed, 15 Dec 2010 17:07:09 GMT __ 2010-12-15T17:07:09Z NoData Value in raster interpolation https://community.esri.com/t5/3d-questions/nodata-value-in-raster-interpolation/m-p/197962#M1235 <HTML><HEAD></HEAD><BODY><SPAN>Hello,</SPAN><BR /><SPAN> </SPAN><BR /><SPAN>Using ArcMap 9.3, I'm trying to interpolate a surface from a shapefile containing precipitation values for various rain gages. The data is monthly, and I'm creating surfaces for one month at a time. </SPAN><BR /><SPAN> </SPAN><BR /><SPAN>Some gages were not functional over the entire time period, so values of -99999 were used to show that is an </SPAN><STRONG>invalid point</STRONG><SPAN> (which needs to be distinguished from valid 0 values). </SPAN><BR /><SPAN> </SPAN><BR /><STRONG>Is there a way to ignore these values</STRONG><SPAN> when using Kriging, IDW, or other interpolation methods? Otherwise, I will get giant valleys in my rasters.</SPAN><BR /><SPAN> </SPAN><BR /><SPAN>Thanks.</SPAN></BODY></HTML> Wed, 15 Dec 2010 17:07:09 GMT https://community.esri.com/t5/3d-questions/nodata-value-in-raster-interpolation/m-p/197962#M1235 __ 2010-12-15T17:07:09Z