Then usable tread depth is compared to remaining tread depth in order to calculate tread wear percentages. For example, a tire that started with 10/32 of original tread depth and has worn off 4/32 (down to 6/32 of remaining tread depth) is 50% worn.
1 If you know the census tract number: Use the IRS list of 2014 Qualified Census Tracts by county. 2  If you have a street address: Visit HUD's interactive QCT Map and enter the property address to view what Census Tract the property is located.
Calculate Area (Acreage) using your Garmin fenix. Calculate area with your Garmin fenix. ExpertGPS automatically calculates the acreage of any parcel, field, or tract no matter how irregular, when you record the boundary with your Garmin fenix or trace it over the maps in ExpertGPS.. Calculate area by marking GPS waypoints at the corners of a field or parcel. In ExpertGPS, connect those waypoints into a route, and the acreage is automatically calculated. 3. Calculate area by tracing over a map or aerial photo.