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Thorn Street

Geospatial Intelligence for locals, travelers, homebuyers, real estate agents, investors, brokers, appraisers, developers, builders, architects, planners, lenders, insurers, analysts, researchers, enthusiasts, explorers and everyone.

Thorn Street is your Geospatial AI platform. Ask for details about any location and get clear answers, an interactive map, and verified sources to back it all up.

LIMITED TRIAL NOW OPEN FOR SAN DIEGO GEOGRAPHY 
REAL QUESTIONS · DETAILED RESPONSES

Maps show you where.
Leif tells you what it means.

Real questions, answered by Leif. Pick one to see the steps it took, the answer it gave and the map it made, with every source cited.

PLAN
  1. 1
    Outline both communities
    SANDAG plan areas · Scripps Ranch is two
  2. 2
    Overlay CAL FIRE’s Very High zones
    intersect · LRA 2025 + SRA 2024
  3. 3
    Keep homes with 100+ sq ft of lot in the zone
    filter · assessor use codes
  4. 4
    Spot-check against CAL FIRE’s live map
    verify · 4 of 4 matched

10,741 residential parcels: 5,417 in Rancho Bernardo (36% of its homes) and 5,324 in Scripps Ranch (79%).

ready in ~10 min · 3 sources · CSV + GeoPackage
Which residential parcels in Rancho Bernardo and Scripps Ranch are in a CAL FIRE Very High fire hazard severity zone?Leif
Map of Rancho Bernardo and Scripps Ranch: 10,741 residential parcels in CAL FIRE Very High zones, 5,417 (36%) in Rancho Bernardo and 5,324 (79%) in Scripps Ranch.

From a question to a finished deliverable.

No GIS software and no layer panels. Ask the way you’d ask a colleague, and Thorn Street works out the data, the analysis and the map.

01 · ASK

Start with a question

“Which lots near UCSD can add an ADU?” “Plan my eight showings tomorrow.” Name a place or paste a list of addresses.

02 · ANALYZE

It finds the data and does the work

Zoning, parcels, hazard maps, transit and drive times, pulled from official public sources. Every step is logged, so you can check how it got there.

03 · DELIVER

Refine it, then hand it off

Follow up in plain words, like “start from home” or “leave my address out”. Walk away with a map, a spreadsheet, a GIS file or a printable PDF.

Built for explorers.

Keep a project going for the work you do every week, or ask a single question when you’re curious.

Real estate

Agents, brokers and investors

Every listing, comp and parcel on one map. Ask what’s stuck, what fits, and where to look next.

Building & planning

Developers, architects and planners

Screen sites by zoning, lot size, transit and setbacks. Get a shortlist with the rules cited.

Insurance

Insurers, underwriters and adjusters

Fire, flood, soil and noise exposure across a whole book, with every assumption stated.

Finance

Lenders, appraisers and analysts

Map a loan book or portfolio by value, zoning and hazard, and see where it’s concentrated.

Curious about a place

Locals, travelers and explorers

What’s being built down the street, where the parks are, how far the trolley runs. Just ask.

THE MODEL
Leif

A model that understands space.

Most models can talk about a place. Leif can analyze it. It can tell you how far a property is from the nearest fire station, whether it sits in a flood or fire zone, what’s around it, and how it stacks up against others. Every answer links back to the records it came from, so you can check it yourself.

  • DEFAULTleif

    Leif

    Everyday questions about listings, parcels and markets, answered in seconds.

  • DEEP ANALYSISleif-voyager

    Leif Voyager

    Long, multi-step work across a whole portfolio or county. Takes its time and shows every step.

Plans before it runs

You see the steps first, and you can edit any of them in plain words.

Speaks spatial

Drive-time, zoning, parcels and hazard layers, handled so you don’t have to.

Cites every source

Every answer lists its data, when it ran, and what it assumed.

EARLY ACCESS

Reserve your place.

We’re letting people in a few at a time. Reserve your place in line to get early access.

Leif