Distance in Buffer Calculation - Not Accurate

[Robswann]

For some reason my buffer distance for a attribute rule is very inaccurate. I have tested this with the code below, and for an example, Features that are within 1 mile of school districts layer are not being counted. Any help would be appreciated.

var Districts = FeatureSetByName($datastore, "SCHOOL_DIST")
var Buffer1mile = buffer($feature,1,'mile')
var Districts_Within_Search_Radius = INTERSECTS(buffer1mile,DISTRICTS)
VAR NO_OF_SCHOOLS = COUNT(Districts_Within_Search_Radius)

Count(districts_within_search_radius )

[JayantaPoddar]

Could you try using BufferGeodetic() ?

[David_Brooks]

@Robswann are you working in Web Mercator auxiliary sphere by any chance? Change to a national projection system and rerun the buffers to confirm that's the issue. 

Buffering in WMAS is a nightmare, so you'll need to switch to geodetic method of buffer if you need to stay in that. 

[Robswann]

OK i have tried both suggestions. I was working with WMAS, and changed it to NAD 1983. I am still getting inaccurate returns. For some reason, when I input the buffer geodesic it returns an error.  Again thanks for the help

[David_Brooks]

If your data is in Web Mercator, try reprojecting it to NAD1983 also change the system of your map.

[DanPatterson]

Nad83 is a datum... do mean a UTM or State Plane etc with a NAD83 datum?

[David_Brooks]

@DanPatterson , great point, i wasn't clear in my reply. You need to change the coordinate system into a projected system in either UTM or state plane (local system to your area)

[Robswann]

I have all layers and map in the NAD 1983 StatePlane Texas S Central FIPS 4204 (US Feet), Should I try a different Coordinate System? 

[JayantaPoddar]

Does your original script return any count at all? Please check with 10 miles of buffer distance. If it doesn't, there is issue with the script.

[Robswann]

Yes it is returning a count.

It should return a 1 when the polygon is not within 1 mile of a school district.

If it is 1 mile within a school district it should return 2. (The school district is located in, and the school district within 1 mile)