Franklin County, Ohio parcel research. Generated 2026-09-23T13:13:11.340056+00:00.



RECORDS AND OWNERS: All 494,749 records from the stated official parcel selection; 493,274 contain recorded owner names. County public owner records joined by exact statewide parcel ID. Conflicting owner rows remain unknown. Dates are retained separately for boundaries, owners and retrieval. Retrieval today does not refresh an older source snapshot. Duplicate local parcel identifiers can represent multiple geometry records; record_id is unique. Import parcel identifiers and postal codes as text in spreadsheet software to preserve leading zeros. Public ownership entries are not verified legal title or sale listings. Mailing addresses are tax-record entries, not permission to contact. source_land_area retains the source value without assuming units; computed_screen_acres is measured from the mapped polygon. Tax class is not zoning.



GEOMETRY: Original valid parcel polygons preserved. Invalid or absent parcel geometry receives null analytical results. Every valid parcel representative point checked against its named official county boundary with100m tolerance; unreviewed mismatches block publication. Individually reviewed county-boundary disagreements are quarantined with null analysis and original geometry retained in a separate exception file. Overlay invalid polygons may be made valid, with repair count retained. Areas and shortest distances use EPSG26917. Parcel boundaries are not surveys.



FLOOD: Full parcel polygons intersect the complete retrieved FEMA NFHL county layer. Overlaps under1square meter omitted. Areas are unions, preventing double counting. All percentages use FULL parcel area as denominator. fema_mapped_pct measures retrieved mapping coverage. sfha_pct measures overlap where FEMA SFHA_TF=T. Partial mapping leaves the remaining parcel area unknown; no mapping or no usable geometry yields blank SFHA results. Zero known overlap is not a guarantee against flooding. Zone subtypes, floodway measures and available static base-flood elevations with units/datums are retained. Missing FEMA sentinel values stay null. Per-feature evidence preserves source identifiers and citations. This is GIS screening, not a lender flood certificate.



SCHOOLS: NCES2024-25 active, nonvirtual public-school locations within Ohio and Census ACS2024 Ohio unified districts. The nearest-school search is limited to Ohio schools; schools in neighboring states are outside this search. Distance is the shortest straight line from parcel to mapped school. Nearest school does not establish attendance assignment, enrollment or school quality.



SCOPE: This edition includes recorded ownership, source property fields, FEMA and school mapping. Current zoning overlays, utility capacity, legal access, permitted use, vacancy, title, availability for sale and project suitability are not established by these fields. Additional data are included only when sourced and measured. Missing values remain blank; zero remains zero.



USE: Paid curation and spatial analysis of public source facts. Internal business and client work allowed; no exclusive rights to government facts claimed. Seven-day correction/refund policy if delivered files fail stated scope; dakota@landsightsolutions.com.



REVIEWED GEOMETRY EXCEPTIONS: 6 source records disagree with the mapped county boundary after individual official-source review. These rows are retained with a quality flag, null analytical geometry and null spatial results. Original source geometry and review evidence are preserved separately in reviewed-geometry-exceptions.geojson. No boundary was moved or widened to force a match.



LANDSIGHT PARCEL SCREENING UPDATE
Mapped zoning is intersected with full valid parcel polygons using EPSG:6933 equal-area geometry. Coverage uses the union of retrieved polygons; intersections below one square metre are excluded. Zoning codes, labels, jurisdiction/source links and per-match shares are retained in zoning-evidence.ndjson. Municipal-only and township-only layers do not imply whole-county coverage. No match means unknown in the retrieved layers, NOT unzoned, prohibited or permitted. Source layers can have differing dates and boundary offsets; multiple matches require review with the relevant jurisdiction. This is not a zoning approval or buildability determination.

mapped_area_outside_sfha_acres is computed_screen_acres * (fema_mapped_pct - sfha_pct) / 100, clipped at zero for rounding. It counts only the mapped portion outside the Special Flood Hazard Area; unmapped area is excluded. It is NOT usable or buildable acreage and does not subtract wetlands, setbacks, easements or other restrictions. Existing flood and source-date fields are retained.

Open parcel-screening.html to filter the included CSV and export a shortlist. The tool works locally and does not upload parcel data. Each filter result is a research candidate, not a recommendation or certification. Inspect source dates, quality flags and zoning references before further diligence.