Carriageway edge
- Format
- Polyline feature class
- What's in it
- Edge lines for the running carriageway, with running length per segment, joined to your network reference. Lands as the base layer the others sit against.
- Cadence
- Biennial
A road asset register seeded from imagery.
Carriageway, footway, marking and parking features pulled from overhead imagery and handed over as GIS features, keyed to your network.
- GSD
- ≤0.3 m (VHR)
- Cadence
- Biennial
- Platform
- VHR satellite or aerial
- Spectral
- RGB
- Format
- GeoPackage or shapefile feature class
- Keyed to
- your network reference
- Delivery unit
- one delivery per pass, per pilot area
The files
Footway network
- Format
- Polyline feature class
- What's in it
- Footway lines beside the carriageway with running length, where the imagery shows them. Where a footway cannot be seen, the segment carries a flag instead of a guess.
- Cadence
- Biennial
Road markings
- Format
- Point and line feature class
- What's in it
- Markings by type, such as centre lines, edge lines, stop lines and crossings. Type and presence only. Nothing in this layer says how worn the paint is.
- Cadence
- Biennial
Parking inventory
- Format
- Polygon feature class and bay counts
- What's in it
- Parking bay extents along the network and a bay count per segment, for marked and unmarked kerbside parking alike.
- Cadence
- Biennial
Low-confidence flags
- Format
- Attribute column
- What's in it
- Segments under canopy, in deep shadow or without a clear frame are flagged with a reason, so your technician knows which ones to check on the ground first.
- Cadence
- Biennial
How it works
Network in
Send your network as a route file or boundary, with the network reference you want the features keyed to. Say which roads belong in the pilot area.
Imagery
We find a clear daylight pass over that area from VHR satellite or aerial imagery, RGB, at 0.3 m or finer.
Extraction
Carriageway, footway, marking and parking features are extracted from the imagery, then matched to your network reference.
Delivery
A feature class per layer comes back for your GIS officer to load into the register. Your team checks it against the street before anything is accepted.
Limits
Resolution floor
- Effect on the output
- At 0.3 m a pixel is about a foot across. Carriageways, footways and parking bays are wide enough to show at that size.
- What the delivery does
- Kerb upstands, dropped crossings and narrow paint lines are close to the floor, so marking type is read where the paint is clear and left out where it is not.
Inventory, not condition
- Effect on the output
- This is a list of what is there. It does not rate cracking, wear, retroreflectivity or remaining life.
- What the delivery does
- Faded paint appears as present or absent.
Canopy, shadow, cloud
- Effect on the output
- Trees and tall buildings hide edges from above.
- What the delivery does
- Those segments are flagged low-confidence. Optical imagery needs a clear daylight pass, so a cloudy season can push the capture later.
Every two years
- Effect on the output
- One pass every two years. Anything built or repainted after the capture date is missing until the next one.
- What the delivery does
- This is not continuous monitoring.
Above-ground assets and signs
- Effect on the output
- Signs, posts, lamp columns, gullies and drainage are not in this offer.
- What the delivery does
- Overhead imagery does not show them reliably, and they are not in the file list above.
Seed, not final
- Effect on the output
- Treat the delivery as the first draft of the register or a gap-fill for routes you have not surveyed.
- What the delivery does
- It does not replace a full resurvey where you need one.
Why this exists
Registers come from a walked or driven survey, a contractor's mobile capture run, or a technician digitizing edges and markings off aerial photography by hand. All three reach the main roads first. Rural routes and the footways behind estates go in late or stay blank, and a full refresh waits for resurvey money.
Meanwhile the register is what the asset plan and the capital programme are built on.
Who it's for
For
- Asset management engineers building or refreshing a highway asset register.
- Teams with rural or unsurveyed routes missing from the register.
- Authorities that want the register to stay current between full resurveys.
Not for
- Condition surveys or defect rating.
- Signs, lighting, drainage or structures inventories.
- Continuous or real-time network monitoring.
- Private sites, car parks and yards outside the highway network.
Questions before a pilot
What does a delivery contain?
A feature class per layer: carriageway edge, footway network, road markings and parking. Each is keyed to your network reference and carries a low-confidence flag where the imagery was not clear.
Which file formats do you deliver?
GeoPackage or shapefile. Both are standard GIS formats.
Will it load into our asset management system?
We deliver files, and your team loads them. We do not write into your system or connect to it.
Does it tell us what condition the road is in?
No. It is an inventory of what is there. Cracking, wear and paint condition need a condition survey.
Can we check it against our own data?
Yes. Pick a pilot area your team has already surveyed and keep that survey back. Compare the delivery with it, feature class by feature class, and decide whether it is good enough to seed from.
What about cloud on the capture day?
A clear daylight pass is required. Timing follows imagery availability, so a cloudy season can delay the capture.
How current is it?
It refreshes every two years. That keeps the register close between full resurveys. It will not show last month's roadworks.
Who owns the features and the imagery?
Ownership and licence terms for the deliverables and the underlying imagery are written into the pilot agreement before anything is ordered. If your legal team needs to review them, ask early.
Can it cover a whole network?
It is scoped region by region. Start with a pilot area and check it. Whether and how to extend it is agreed after that.
How is a pilot bought and priced?
The quote depends on network length and imagery source, and we price it for your pilot area. Tell us how your authority buys professional services when you ask for a quote.
Start the register from the top of the network.
Tell us which routes you would put in a pilot area and what your register needs them keyed to.
Start a pilot