I've seen posts where the goal is to let the user draw a polygon and select features within it. However, I have a twist on that. I have a find task that will select a particular district number. This is displayed to the user in a graphicslayer as a single polygon (will only ever have one polygon in it, it's just a highlight and I continually clear it out). I would then like to select all the points in another layer that fall within that district
I see that I can define my query to have a spatialRelationship of "SPATIAL_REL_WITHIN", but I can't find a good example of how I might use this. I"m not even sure this is my best approach. I've also been looking at the geometry service and the relations it returns.