topic Re: Difference between standard deviation from attribute and from properties in Spatial Statistics Questions

Difference between standard deviation from attribute and from properties

SergeRafanoharana — Wed, 11 Jan 2012 08:29:12 GMT

Dear All,

v. ArcGIS 9.3

I would like to know what is the difference between the standard deviation in the attribute (Right click on the attribute name -> Statistics) and the standard deviation from the layer properties (Properties -> Symbology -> Classified -> Choose Field Value -> Classify -> Classification Statistics)

So if one asks me to give the standard deviation, let's say of my temperature data (raster), which one should I provide?

Thank you,

Sypou

Re: Difference between standard deviation from attribute and from properties

DanPatterson_Retired — Wed, 11 Jan 2012 18:22:44 GMT

I would first confirm that there are no NoData values in the field, then use the field statistics option. You should also note that the population standard deviation is returned and not a sample standard deviation. Should you require other statistical parameters, and you are using ArcGIS 10, then see
http://resources.arcgis.com/gallery/file/geoprocessing/details?entryID=BDF21676-1422-2418-34E6-A29C6BAC8A0B
after querying for valid data entries.

Re: Difference between standard deviation from attribute and from properties

SergeRafanoharana — Thu, 12 Jan 2012 02:07:56 GMT

Thank you for your answer... As I stated in my previous message, I use v ArcGIS 9.3...
I found out that in the Properties -> Source -> Statistics, we also have the statistics...
Anyway thank you.