topic Determining Fixed Distance Band for Hot Spot Anallysis in Spatial Statistics Questions https://community.esri.com/t5/spatial-statistics-questions/determining-fixed-distance-band-for-hot-spot/m-p/462587#M1432 <HTML><HEAD></HEAD><BODY><SPAN>I doing some hot analysis on distribution of restaurants in LA County. I am rather new to this and need some help in determining the distance band for hot spot analysis. I have a LA County census polygon feature layer with the number of restaurants per census tract. I am trying to determine the distance band to run the hot spot analysis to determine if there is any clustering pattern of food sites in LA County.</SPAN><BR /><BR /><SPAN>When I tried to run the Moran I to determine the distance band without entering any value and use the default distance band it gives me a value of .2265. I am not sure what units this is in whether it's meter or feet or whether this makes any sense or whether I am doing this right.</SPAN><BR /><BR /><SPAN>How do I make sure that the distance values are in the same units as the output coordinate system?</SPAN><BR /><BR /><SPAN>Is it okay to use not enter any value and used the default which comes out to .2265?</SPAN><BR /><BR /><SPAN>I tried distance bands of 5, 10, 50, 1000 and I get a warning and error message:</SPAN><BR /><BR /><SPAN>WARNING: The input feature class does not appear to contain projected data.</SPAN><BR /><BR /><SPAN>ERROR: The threshold distance must be smaller than the feature class extent.</SPAN><BR /><BR /><SPAN>Would greatly appreciate some help and guidance.</SPAN></BODY></HTML> Thu, 29 Apr 2010 16:04:04 GMT AlanWu 2010-04-29T16:04:04Z Determining Fixed Distance Band for Hot Spot Anallysis https://community.esri.com/t5/spatial-statistics-questions/determining-fixed-distance-band-for-hot-spot/m-p/462587#M1432 <HTML><HEAD></HEAD><BODY><SPAN>I doing some hot analysis on distribution of restaurants in LA County. I am rather new to this and need some help in determining the distance band for hot spot analysis. I have a LA County census polygon feature layer with the number of restaurants per census tract. I am trying to determine the distance band to run the hot spot analysis to determine if there is any clustering pattern of food sites in LA County.</SPAN><BR /><BR /><SPAN>When I tried to run the Moran I to determine the distance band without entering any value and use the default distance band it gives me a value of .2265. I am not sure what units this is in whether it's meter or feet or whether this makes any sense or whether I am doing this right.</SPAN><BR /><BR /><SPAN>How do I make sure that the distance values are in the same units as the output coordinate system?</SPAN><BR /><BR /><SPAN>Is it okay to use not enter any value and used the default which comes out to .2265?</SPAN><BR /><BR /><SPAN>I tried distance bands of 5, 10, 50, 1000 and I get a warning and error message:</SPAN><BR /><BR /><SPAN>WARNING: The input feature class does not appear to contain projected data.</SPAN><BR /><BR /><SPAN>ERROR: The threshold distance must be smaller than the feature class extent.</SPAN><BR /><BR /><SPAN>Would greatly appreciate some help and guidance.</SPAN></BODY></HTML> Thu, 29 Apr 2010 16:04:04 GMT https://community.esri.com/t5/spatial-statistics-questions/determining-fixed-distance-band-for-hot-spot/m-p/462587#M1432 AlanWu 2010-04-29T16:04:04Z Determining Fixed Distance Band for Hot Spot Anallysis https://community.esri.com/t5/spatial-statistics-questions/determining-fixed-distance-band-for-hot-spot/m-p/462588#M1433 <HTML><HEAD></HEAD><BODY><SPAN>your coordinates are in decimal degrees, aka Geographic, and need to be projected to a coordinate system that uses feet or meters (ie UTM etc), use the Project tool in Arctoolbox ( </SPAN><A href="http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//00170000007m000000.htm">http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//00170000007m000000.htm</A><SPAN> ) or project the data in ArcCatalog.&nbsp; The old forums contain hundreds of posts related to projecting data</SPAN><BR /><A href="http://forums.esri.com/forums.asp?c=93">http://forums.esri.com/forums.asp?c=93</A><BR /><SPAN>and equivalent help is in the older version help files ( </SPAN><A href="http://webhelp.esri.com/arcgisdesktop/9.3/index.cfm?id=1890&amp;pid=1887&amp;topicname=Project_(Data_Management">http://webhelp.esri.com/arcgisdesktop/9.3/index.cfm?id=1890&amp;pid=1887&amp;topicname=Project_(Data_Management</A><SPAN>) )</SPAN></BODY></HTML> Thu, 29 Apr 2010 16:30:26 GMT https://community.esri.com/t5/spatial-statistics-questions/determining-fixed-distance-band-for-hot-spot/m-p/462588#M1433 DanPatterson_Retired 2010-04-29T16:30:26Z