how to JoinData by Spatial Location to get average value?

[amirpirnia]

I???ve used right click spatial join in ArcGis 9.3 in order to join average value of more than 6000 points data to 300 points, but the problem is I don???t have any control on it, I don???t know what distance has been applied for selecting points and calculating the average value, there is no box for defining it. In addition there is a suggestion by ArcGis help to use ArcTools if you have so many data to join, but in the tools there is no function for calculation average value. I was wondering if anyone knew how it works or gave me an alternative way to cope..

[DaleHoneycutt]

Try the Spatial Join geoprocessing tool.  In the tool dialog box, there's a "field mapping" control.  You can right-click on a field in this control and select "Mean", which will average the values.  See:

Spatial Join tool: http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#/Spatial_Join/00080000000q000000/

Using the field map control: http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//00210000000s000000.htm

Mapping input fields to output fields: http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//002z00000014000000.htm