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Calculate slope aspect in relation to polygon

Question asked by alivingston51 on May 4, 2016
Latest reply on May 5, 2016 by alivingston51

I have a proposed lot plan for a new subdivision.  I'm trying to find which lots slope away or slope towards the streets - essentially uphill and downhill.  I also need to classify the lots by slope categories (0-5, 5-10, 5>10%). 


I took my surface and calculated the slope and the aspect.  I reclassified the aspect into general directions and the slope catagories I need.  I spatially joined my lot polygons to these rasters. 

I have polygons defining my streets and I've buffered them so that they overlap my lot polygons. What I am having trouble with is determining the slope direction off of the street polygon. 


I'm assuming I need to assign elevations to my street polygons and then do a comparison between the elevations and slope of the lot polygons but I'm not sure how to do that.