Oklahoma City Open Data
Infrastructure
Survey Secondary Control Points
A dataset of permanent survey markers (called "secondary control points") that help map and measure Oklahoma City accurately
Source city: Oklahoma City · Catalog date: June 22, 2026 · License: custom
View the city's official map for this dataset → (opens in Oklahoma City's own data portal)
What this is
A dataset of permanent survey markers (called “secondary control points”) that help map and measure Oklahoma City accurately.
Why it matters to you
These markers are the hidden reference points that ensure construction projects, property surveys, and infrastructure work align correctly. If a developer builds a new shopping center or the city repairs a bridge, surveyors use these markers to verify locations down to the inch. Errors in these points could mean misplaced property lines or misaligned roads.
How to read this data
Key fields include:
- Station number: A unique ID for each survey marker (like “OKC-456”).
- Easting/Northing: Precise coordinates in Oklahoma’s state plane system (not latitude/longitude).
- Elevation: Height above sea level in feet—critical for floodplain maps or grading land.
- Description: Notes like “in sidewalk near NW 23rd & Walker” to help locate the physical marker.
Where this leaves you
This dataset doesn’t support address lookups, but professionals use it to anchor legal surveys and engineering plans. If you’re disputing a property line, your surveyor would reference these points.
The fields, explained
Pulled directly from the source catalog's published field definitions — not paraphrased.
| Field | What it means |
|---|
ObjectID | Numeric unique identifier with no special meaning |
Station number | Station number associated with monument |
Easting | East coordinate base on datum (WKID 103512) |
Northing | North coordinate base on datum (WKID 103512) |
Elevation | Elevation above sea level in US feet |
Code | Code associated with monument |
Description | Additional comments about location of monument |
Source | Entity providing information on monument |
Material Code | Code for material of monument |
Size Code | Code used for size of monument |
Shape | Geographic data in state plane coordinates (WKID 103512) |
From the source — real records
Unedited rows from Oklahoma City's published service, pulled when this site was built.
Look it up yourself
Everything on this page comes from the city's public open-data catalog. Anyone can download it — CSV, GeoJSON, KML, or the live service.
Maintained by: This dataset is maintained by the Public Works Department of the City of Oklahoma City.
This explainer was written from the published catalog record. Always verify against the source dataset before relying on it for a decision.