topic Re: How to set a minimum value for kriging and cokriging? in ArcGIS GeoStatistical Analyst Questions https://community.esri.com/t5/arcgis-geostatistical-analyst-questions/how-to-set-a-minimum-value-for-kriging-and/m-p/703334#M1602 <HTML><HEAD></HEAD><BODY><P>Thank you very much Steve. Sorry, one more question - if you have time? I am using the predicted surfaces as a visual mapping tool to discuss with farmers possible management changes to their farms (I am modelling soil carbon). I assume using this log transformation will give skewed visuals - ie some parts of the range will be more emphasized (visually) than others? (I do understand that I can calculate the true values by back-transforming the predicted ones if I am just looking at the numbers). </P></BODY></HTML> Wed, 18 Feb 2015 21:14:06 GMT BethBrockett 2015-02-18T21:14:06Z How to set a minimum value for kriging and cokriging? https://community.esri.com/t5/arcgis-geostatistical-analyst-questions/how-to-set-a-minimum-value-for-kriging-and/m-p/703330#M1598 <HTML><HEAD></HEAD><BODY><P>Hello everyone</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>I wonder if anyone can advise how I can set a minimum value for an interpolated surface created by kriging and cokriging? (I want to set a minimum predicted value of zero).&nbsp; I am using the Geostatistical Analyst Wizard to create my model specifications - but may be able to get the modification scripted if necessary.</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Many thanks, Beth</P></BODY></HTML> Wed, 18 Feb 2015 18:00:37 GMT https://community.esri.com/t5/arcgis-geostatistical-analyst-questions/how-to-set-a-minimum-value-for-kriging-and/m-p/703330#M1598 BethBrockett 2015-02-18T18:00:37Z Re: How to set a minimum value for kriging and cokriging? https://community.esri.com/t5/arcgis-geostatistical-analyst-questions/how-to-set-a-minimum-value-for-kriging-and/m-p/703331#M1599 <HTML><HEAD></HEAD><BODY><P>Beth</P><P></P><P>In 10.1 we introduced some new <A href="http://desktop.arcgis.com/en/desktop/latest/guide-books/extensions/geostatistical-analyst/normal-score-transformation.htm">transformations</A>. If you pick LogEmpirical the predictions will be &gt; zero.</P><P></P><P>-Steve</P></BODY></HTML> Wed, 18 Feb 2015 18:15:54 GMT https://community.esri.com/t5/arcgis-geostatistical-analyst-questions/how-to-set-a-minimum-value-for-kriging-and/m-p/703331#M1599 SteveLynch 2015-02-18T18:15:54Z Re: How to set a minimum value for kriging and cokriging? https://community.esri.com/t5/arcgis-geostatistical-analyst-questions/how-to-set-a-minimum-value-for-kriging-and/m-p/703332#M1600 <HTML><HEAD></HEAD><BODY><P>Many thanks for this Steve. I am working on 10.2.2 - in the wizard I see that I can choose log but can't see 'logempirical' please can you advise where this option is? Beth</P></BODY></HTML> Wed, 18 Feb 2015 18:32:35 GMT https://community.esri.com/t5/arcgis-geostatistical-analyst-questions/how-to-set-a-minimum-value-for-kriging-and/m-p/703332#M1600 BethBrockett 2015-02-18T18:32:35Z Re: How to set a minimum value for kriging and cokriging? https://community.esri.com/t5/arcgis-geostatistical-analyst-questions/how-to-set-a-minimum-value-for-kriging-and/m-p/703333#M1601 <HTML><HEAD></HEAD><BODY><P><IMG alt="a.png" class="jive-image image-1" src="https://community.esri.com/legacyfs/online/63128_a.png" style="width: 620px; height: 582px;" /></P></BODY></HTML> Wed, 18 Feb 2015 18:44:59 GMT https://community.esri.com/t5/arcgis-geostatistical-analyst-questions/how-to-set-a-minimum-value-for-kriging-and/m-p/703333#M1601 SteveLynch 2015-02-18T18:44:59Z Re: How to set a minimum value for kriging and cokriging? https://community.esri.com/t5/arcgis-geostatistical-analyst-questions/how-to-set-a-minimum-value-for-kriging-and/m-p/703334#M1602 <HTML><HEAD></HEAD><BODY><P>Thank you very much Steve. Sorry, one more question - if you have time? I am using the predicted surfaces as a visual mapping tool to discuss with farmers possible management changes to their farms (I am modelling soil carbon). I assume using this log transformation will give skewed visuals - ie some parts of the range will be more emphasized (visually) than others? (I do understand that I can calculate the true values by back-transforming the predicted ones if I am just looking at the numbers). </P></BODY></HTML> Wed, 18 Feb 2015 21:14:06 GMT https://community.esri.com/t5/arcgis-geostatistical-analyst-questions/how-to-set-a-minimum-value-for-kriging-and/m-p/703334#M1602 BethBrockett 2015-02-18T21:14:06Z Re: How to set a minimum value for kriging and cokriging? https://community.esri.com/t5/arcgis-geostatistical-analyst-questions/how-to-set-a-minimum-value-for-kriging-and/m-p/703335#M1603 <HTML><HEAD></HEAD><BODY><P>In most cases there should not be a problem. You can, however, see how well or how badly the data are being transformed. On the NormalSoreTransformation page in the Wizard change to a Cumulative graph and you’ll see if there is a large deviation or not.</P><P>The Wizard automatically does the back-transform so you don’t have to do that yourself.</P><P></P><P>-Steve</P></BODY></HTML> Wed, 18 Feb 2015 22:08:55 GMT https://community.esri.com/t5/arcgis-geostatistical-analyst-questions/how-to-set-a-minimum-value-for-kriging-and/m-p/703335#M1603 SteveLynch 2015-02-18T22:08:55Z