How to read a Los Angeles report

What the city publishes, how the two parcel numbers meet, and what a comparison claims.

What a Los Angeles report is assembled from

Two area streams, read live from the city's own portal at the moment you ask: LAPD incident reports under the NIBRS standard it adopted in 2024 (with the 2020–2023 archive counted separately, because the two systems' categories do not map onto each other), and building permits issued by the Department of Building and Safety since 2020. On the parcel itself: Los Angeles County's assessment roll, and LADBS code-enforcement cases open and closed. Around it, the federal and national layers every report carries — the FEMA flood zone, the USGS quake record, the National Register, broadband, air, solar and the census.

Everything is counted within the radius you chose, against what an average area of the same size in the city records. Nothing is scored.

Two parcel numbers, and how they meet

The city keys its own records on a PIN — the address register and every code-enforcement case carry it. The county keys the assessment roll on an AIN. They never join directly. The report finds the county parcel by asking the county's own parcel map which polygon the address point sits in, and reads the roll from that. Where the point sits outside every polygon, the roll section says so rather than showing a blank.

What a comparison claims

An area count carries a ratio against the city's own average: this many records fell inside your radius, against the number you would expect if the whole city's records were spread evenly. It is arithmetic about a dataset, not a judgment about a place. Somewhere busy reads high on almost everything, because more of everything happens there.

LAPD publishes location to the hundredth block, not the address, and its feed has no map point — only a latitude and a longitude. So the police count is a box the width of your radius rather than a circle, which over-counts the corners by about a quarter. The report says so on that section rather than rounding it away.

What is deliberately absent

311. The city's live service-request feed is not on its open-data portal; only a 2013–14 archive is. The report carries no 311 section rather than an old one.
Fire call-outs. LAFD's response data is published, but seven months stale at launch. A stalled feed on a section readers use to judge a building is worse than no section.
Rent stabilization. Los Angeles has the Rent Stabilization Ordinance in law, and the Housing Department publishes no register of covered units this report can read. So there is no rent-control finding — not a guess from the year built, which is how it is usually done and usually wrong.

Counts run 4 September 2026.