Coverage, county by county

AEC First Phase works in Los Angeles County and nine more California counties: Orange, Ventura, San Bernardino, Riverside, San Diego, Santa Barbara, San Luis Obispo, Kern and Imperial. Los Angeles County is the deepest. In the other nine the package holds what each county publishes online, and this page lists it, as of the last check of each county’s services.

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Shaded by how many of the five kinds of survey record a run collects there, from none to all five. A schematic, not to scale. Each county opens its entry below.

Survey records, by county

A run looks for each kind of record on and around the lot, out to 660 feet. What it can bring back depends on what the county’s surveyor publishes online.

Listed, placed and linked — the document can be added to the package
Listed, placed and linked to the county’s copy — the document is not downloaded
Listed and placed from the county’s index — no document link
Out of service when last checked — the county’s own index did not answer
Not collected

What a run collects of each kind of survey record, and whether the assessor’s map page and building footprints are published as files the package can hold. The nine counties’ rows are as of the last check of each county’s services, September 23, 2026. Los Angeles County is not part of that check: its row says what a run collects when the County’s and the City’s services answer.

Swipe the table sideways to see all of it.

Survey records collected, by county
County	Records of survey	Parcel maps	Tract maps	Corner records	Benchmarks	Assessor’s map page	Building footprints
Los Angeles	Documents	Documents	Documents	Documents	Links	Collected	Published
Orange	Documents	Documents	Documents	Documents	Documents	Collected	Published
Ventura	Documents	Documents	Documents	Documents	Documents	Collected	Published
San Bernardino	Documents	Documents	Documents	Documents	Documents	Collected	Not published
Riverside	Documents	Documents	Documents	Out of service	Out of service	Collected	Not published
San Diego	Documents	Documents	Documents	Documents	Documents	No file	Not published
Santa Barbara	Documents	Not collected	Not collected	Documents	Not collected	Collected	Published
San Luis Obispo	Documents	Documents	Documents	Documents	Not collected	No file	Published
Kern	Not collected	Links	Links	Not collected	Not collected	Collected	Not published
Imperial	Not collected	Not collected	Not collected	Not collected	Not collected	No file	Not published

In every one of the ten

These do not depend on the county surveyor’s index. Every package holds them.

The lot from the county’s own parcel layer, and the city or unincorporated area it lies in.
The Reference Map, with each record found drawn where it lies.
The compiled drawing: a DXF on the county’s State Plane zone.
The Property Report as a PDF, and the three site plan base sheets.
Terrain contours from public elevation data, and the aerial.
A 3D massing model of the terrain — with the buildings on it where the county publishes footprints.

Each county

Los Angeles County

Office of the Los Angeles County Surveyor (Public Works)

Survey records, with documents: Records of Survey; Parcel Maps; Tract Maps; Corner Records
Linked, not downloaded: Benchmark/Baseline/Quad. The county publishes each benchmark as a page of its own, not a document; the link to that page is kept.
Other survey records: Road/Public Works Centerline; County Engineer Centerline
Assessor’s map page: Collected as a file.
Zoning: In the City of Los Angeles, the City’s zoning and overlay data (ZIMAS). In unincorporated areas, the County’s zoning and overlays (Z-NET). In the county’s other cities, zoning is not collected.
Building footprints: Published. They are drawn in the CAD file and stand in the 3D model.
Terrain: NOAA lidar elevation, as contours and a surface.
Coordinates: State Plane CA Zone 5 (EPSG:2229), US survey feet.
In the City of Los Angeles: The City’s survey control points with their field-book pages, and the City map layers its service publishes under a verified name — easements, rights-of-way, sewers and storm drains among them — as a CAD drawing with its layers. Which layers a property gets depends on what the City’s service publishes that day, and the package says how many it did not serve. City of Los Angeles properties only.
In these other cities: The city’s own centerline ties or survey records, listed and linked to the city’s site: Azusa, Burbank, Culver City, Glendale, San Gabriel, San Marino, Santa Monica, Signal Hill, Torrance.
Last checked: Los Angeles County is not part of the nine counties’ source check. A run reports what each service answered that day.

Orange County

OC Public Works — OC Survey

Survey records, with documents: Records of Survey; Parcel Maps; Tract / Subdivision Maps; Corner Records; Vertical Control (Benchmarks)
Other survey records: City Tie Books (listed only: city tie books are indexed by OC Survey but served by each city); County Surveyor Tie Books; Alignment Notes; Horizontal Control (GPS)
Assessor’s map page: Collected as a file.
Zoning: The county’s zoning layer, which covers unincorporated areas. Inside a city the county publishes no zone, and the package says so. General plan land use is collected too.
Overlays checked: Second-level zoning (community); Coastal Zone; Floodplains; Fire Hazard Severity Zone (LRA); Liquefaction
Building footprints: Published. They are drawn in the CAD file and stand in the 3D model.
Terrain: USGS 3DEP elevation, as contours and a surface.
Coordinates: State Plane CA Zone 6 (EPSG:2230), US survey feet.
Last checked: September 23, 2026.

Ventura County

Ventura County Public Works — County Surveyor

Survey records, with documents: Records of Survey; Parcel Maps; Miscellaneous Records (Tract / Misc Maps); Corner Records; Benchmarks
Other survey records: Centerline / City Ties; County Surveyor Records; Unrecorded Maps; State Highway Maps
Assessor’s map page: Collected as a file.
Zoning: The county’s zoning layer, which covers unincorporated areas. Inside a city the county publishes no zone, and the package says so.
Overlays checked: Community Business District; Critical Wildlife Passage Areas; Habitat Connectivity Corridors; Mineral Resource; Mobile Home Park; Ojai Valley Dark Sky; Santa Monica Mountains; Scenic Resource; Senior Mobile Home Park; Temporary Rental Units
Building footprints: Published. They are drawn in the CAD file and stand in the 3D model.
Terrain: USGS 3DEP elevation, as contours and a surface.
Coordinates: State Plane CA Zone 5 (EPSG:2229), US survey feet.
Last checked: September 23, 2026.

San Bernardino County

San Bernardino County Public Works — Surveyor

Survey records, with documents: Records of Survey; Parcel Maps; Tract Maps (Map Books); Corner Records; Vertical Control (Benchmarks)
Other survey records: Centerline Ties (CSFB); Field Books / Tie Books; Horizontal Control; Other Surveyor Index Records
Assessor’s map page: Collected as a file.
Zoning: The county’s combined zoning layer.
Building footprints: Not published by the county. The 3D model shows the terrain and the lot lines.
Terrain: USGS 3DEP elevation, as contours and a surface.
Coordinates: State Plane CA Zone 5 (EPSG:2229), US survey feet.
Last checked: September 23, 2026.

Riverside County

Riverside County Transportation Department — County Surveyor

Survey records, with documents: Records of Survey; Parcel Maps; Tract Maps (Map Books)
Out of service when last checked: Corner Records; Tie Books; Field Books; Benchmarks. The county’s own index for these did not answer when it was last checked (September 23, 2026). A run collects them when the county’s service answers, and says so on the run page when it does not.
Note: The county’s document host refused automated requests when it was last checked, so its documents could not be downloaded that day (September 23, 2026).
Assessor’s map page: Collected as a file.
Zoning: The county’s zoning layer, which covers unincorporated areas. Inside a city the county publishes no zone, and the package says so. General plan land use is collected too.
Building footprints: Not published by the county. The 3D model shows the terrain and the lot lines.
Terrain: USGS 3DEP elevation, as contours and a surface.
Coordinates: State Plane CA Zone 6 (EPSG:2230), US survey feet.
Last checked: September 23, 2026.

San Diego County

San Diego County Public Works — County Surveyor (Survey Records System)

Survey records, with documents: Records of Survey; Parcel Maps; Subdivision Maps; Corner Records; Benchmarks
Other survey records: Other Survey Records (misc. maps, deed book maps, 2011 assessor book archive); Survey Control Monuments (listed only: control monument data is carried on the record itself)
Note: The county’s record catalog answered only in part when it was last checked (September 23, 2026).
Assessor’s map page: Not collected. San Diego County publishes assessor map pages only through ParcelQuest.
Zoning: The county’s zoning layer, which covers unincorporated areas. Inside a city the county publishes no zone, and the package says so. General plan land use is collected too.
Overlays checked: Airport Safety Zones; Fire Responsibility Area; Wildland-Urban Interface; Floodway / Floodplain; Alquist-Priolo Fault Zone; Coastal Zone; Liquefaction
Building footprints: Not published by the county. The 3D model shows the terrain and the lot lines.
Terrain: USGS 3DEP elevation, as contours and a surface.
Coordinates: State Plane CA Zone 6 (EPSG:2230), US survey feet.
Last checked: September 23, 2026.

Santa Barbara County

Santa Barbara County Public Works — Surveyor Division

Survey records, with documents: Records of Survey; Corner Records
Not collected: Parcel maps. Parcel Maps are not indexed online by the county. Tract maps. Tract / miscellaneous maps are not indexed online by the county. Benchmarks. County benchmarks have no public spatial layer.
Assessor’s map page: Collected as a file.
Zoning: The county’s zoning layer, which covers unincorporated areas. Inside a city the county publishes no zone, and the package says so. General plan land use is collected too.
Overlays checked: Coastal Zone; Environmentally Sensitive Habitat (ESH); Montecito Hillside District (H-MON); Special Problem Areas; Scenic Highways; Affordable Housing Overlay; Community Plan Area; Urban Area (Comprehensive Plan)
Building footprints: Published. They are drawn in the CAD file and stand in the 3D model.
Terrain: USGS 3DEP elevation, as contours and a surface.
Coordinates: State Plane CA Zone 5 (EPSG:2229), US survey feet.
Last checked: September 23, 2026.

San Luis Obispo County

San Luis Obispo County Public Works — County Surveyor

Survey records, with documents: Records of Survey; Parcel Maps; Tract / Subdivision Maps; Corner Records
Not collected: Benchmarks. Not in the county’s published index.
Other survey records: Historical Corner Record Cards (by township/range); County Monuments (listed only: monument data is carried on the record)
Assessor’s map page: Not collected. San Luis Obispo County publishes no assessor map-book PDFs.
Zoning: The county’s zoning layer, which covers unincorporated areas. Inside a city the county publishes no zone, and the package says so.
Overlays checked: Coastal Zone; CD FH Flood Hazard; CD GSA Fault / Alquist-Priolo; CD GSA Geologic Study Area; CD SRA Sensitive Resource Area; CD AR Airport Review; Fire Hazard Severity Zones; FEMA Flood Zones; Urban Service Line
Building footprints: Published. They are drawn in the CAD file and stand in the 3D model.
Terrain: USGS 3DEP elevation, as contours and a surface.
Coordinates: State Plane CA Zone 5 (EPSG:2229), US survey feet.
Last checked: September 23, 2026.

Kern County

Kern County Public Works — County Surveyor

Linked, not downloaded: Parcel Maps. The county’s document host does not allow automated downloads; the links to its copies are kept. Tract / Subdivision Maps. The county’s document host does not allow automated downloads; the links to its copies are kept.
Not collected: Records of survey. Records of Survey are indexed only in the County’s Chaindex search form. Corner records. Corner Records are indexed only in the County’s Corner Records search form. Benchmarks. County benchmark layers are not open to the public.
Assessor’s map page: Collected as a file.
Zoning: The county’s zoning layer, which covers unincorporated areas. Inside a city the county publishes no zone, and the package says so. General plan land use is collected too.
Overlays checked: Specific Plan; Airport Land Use Compatibility; Williamson Act (active); Metro Bakersfield HCP
Building footprints: Not published by the county. The 3D model shows the terrain and the lot lines.
Terrain: USGS 3DEP elevation, as contours and a surface.
Coordinates: State Plane CA Zone 5 (EPSG:2229), US survey feet.
Last checked: September 23, 2026.

Imperial County

Imperial County Public Works — County Surveyor

Not collected: Records of survey, Parcel maps, Tract maps, Corner records, Benchmarks. Not published online by Imperial County.
Assessor’s map page: Not collected. Imperial County publishes assessor map pages only inside the ParcelQuest viewer.
Zoning: The county’s zoning layer, which covers unincorporated areas. Inside a city the county publishes no zone, and the package says so. General plan land use is collected too.
Overlays checked: Renewable Energy Overlay Zone; Airport Land Use Compatibility; ALUC Safety Zones
Overlay out of service when last checked: County Community Plan (September 23, 2026).
Building footprints: Not published by the county. The 3D model shows the terrain and the lot lines.
Terrain: USGS 3DEP elevation, as contours and a surface.
Coordinates: State Plane CA Zone 6 (EPSG:2230), US survey feet.
Last checked: September 23, 2026.

Cities with their own survey records

Inside Los Angeles County some cities publish survey records of their own, apart from the County Surveyor’s. Where the lot is in one of them, the run collects those too.

City of Los Angeles
Azusa
Burbank
Culver City
Glendale
San Gabriel
San Marino
Santa Monica
Signal Hill
Torrance

The City of Los Angeles publishes survey control points with their field-book pages, and its own map layers of easements, sewers and rights-of-way. The others publish centerline ties, field books or other survey records on their own sites; each record is listed and linked to the city’s copy.

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A City of Los Angeles property: 1635 Woods Dr. AEC First Phase is not affiliated with this property or its owners.

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