Blog · September 20, 2026 · How-to
How to read a parcel map
“How to read a parcel map” is a top question in parcel-map SEO for a reason — the first county GIS site feels dense. Use this checklist on any U.S. county viewer, including Utah’s.
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Step 1 — Open the right map
Launch the official county GIS from Platbookmapper. Bookmark the real viewer; skip scraped screenshot galleries.
Step 2 — Find the polygon
Zoom until lot outlines appear. Click your property. The identify tool is how almost every parcel map “reads” attributes.
Step 3 — Read the parcel number
Look for APN, PIN, parcel #, serial, or tax ID. Copy it. That string unlocks assessor and tax sites. Guide: find a parcel number on a map.
Step 4 — Lot lines
Lines = tax parcel boundary — the property lines you see in a parcel viewer. They may not match fences. Treat them as orientation, not construction stakes.
Step 5 — Basemaps & overlays
Streets for navigation, imagery for buildings. Turn off zoning/flood layers when they clutter the view.
Step 6 — Dimensions
On-screen measure tools are approximate. Permits and fences need plats/surveys.
Step 7 — Easements
Often absent from the parcel layer. Check other layers or the recorded plat.
Common symbols
- Solid outline — tax parcel
- Dashed/hatch — easement, ROW, or hazard overlay (check legend)
- Label — truncated APN or lot number
- Address point — may not sit on the centroid
60-second drill
Open a house you know, search the address, click the lot, confirm ID and acreage. Then try Utah County or Salt Lake County if you want live practice data.
Not a survey. Web parcel maps are tax and planning layers. They are not a substitute for a recorded plat, deed, or licensed survey — especially for fences, setbacks, or disputes.