Image Annotation & Data Labeling
Delta Precision Group provides managed image annotation and data labeling, including ADA and PROWAG compliant annotation of sidewalks, crosswalks, and curb ramps, for AI and robotics companies, engineering firms, and public agencies that need volume, accuracy, and a team that manages itself.
01 / PROVEN IN PRODUCTION
What Delta Precision Group has delivered in image annotation and data labeling.
Our image annotation capability is the most thoroughly demonstrated of everything we offer. The numbers below come from an ongoing production engagement for a US based Urban Robotics client whose autonomous sidewalk-assessment robots serve cities and public agencies across the US.
46,677+
Files completed
20% to 10%
Rework rate reduced
5–7 to 48hrs
Days to hours turnaround
97%
On-time delivery rate
3 to 26
Team members built around the workflow
400+
Hours of ADA/PROWAG domain training
10
Municipalities across the United States
These figures reflect nine months of ADA and PROWAG compliant geospatial annotation work, not a one-time project or a claim without a track record behind it. Rush delivery has been achieved in 24 hours when required.
02 / Who This Is For
Built for organizations where an annotation error isn’t a small mistake.
AI and robotics companies
That need human-labeled geospatial or street-level imagery at volume, on a temporary or project basis, without building a permanent internal annotation team.
Municipalities and public agencies
That need sidewalk, crosswalk, and curb-ramp inventories developed to support ADA and PROWAG accessibility assessments, or other infrastructure compliance data built from imagery.
Engineering and environmental consultants
With annotation or labeling overflow tied to a client deliverable, where the output needs to hold up to a compliance review.
Companies building computer vision products
That require annotated aerial or street-level imagery, and need a labeling partner who understands what the data is actually being used for.
If that’s not quite your situation, tell us what you’re trying to produce — we’ll give you a straight answer on whether we’re a fit.
03 / Why A Partner
Why organizations bring in a partner for image annotation and data labeling.
Annotation needs rarely arrive on a predictable schedule.
Hiring solves the volume problem but creates a fixed cost around a variable need, and training an internal team to recognize ADA and PROWAG standards takes time most projects don’t have. Handing the work to a generic labeling vendor is worse: this is judgment-dependent work, not rules-based data entry, and a vendor with no stake in the outcome has no reason to catch the edge cases that actually matter.
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A new municipal contract means a surge of imagery to process.
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A compliance audit creates a backlog the existing team can’t clear without pulling analysts off higher-value work.
Delta Precision Group is the alternative: a team trained against your specific standards, managed internally, and scaled to match your actual volume, with the accuracy record to back it up.
04 / THE WORK
Image annotation and data labeling built for production.
High-volume annotation of geospatial and street-level imagery for AI training datasets, compliance inventories, infrastructure assessment, and spatial data production workflows.
- What we deliver
- Polygon and bounding box annotation, feature classification, attribute assignment, slab-level annotation, obstruction and damage identification, structured labeling to your schema, and multi-pass internal QA before anything is submitted.
- Demonstrated
- We’ve completed 46,677 files of ADA and PROWAG compliant annotation across sidewalk, crosswalk, and curb ramp imagery for a US based Urban Robotics client. That work is completed entirely inside the client’s proprietary platform, which is the same adaptability we bring to any client’s system rather than requiring a standardized file handoff.
- Who this is for
- AI and robotics companies needing human-labeled geospatial training data, companies building computer vision products that require annotated street-level or aerial imagery, and organizations producing ADA or infrastructure compliance inventories from imagery.
05 / COMPLIANCE EXPERIENCE
How we work with you to support ADA/PROWAG compliance.
ADA and PROWAG compliance isn’t something we claim to already know cold and then apply on autopilot. It’s something we actively coordinate with your team on, starting before a single file is touched and continuing for the life of the engagement.
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We train against the standard, not against assumptions. Every annotator completes structured, documented training against ADA and PROWAG requirements before handling live work. On our Urban Robotics engagement, that meant 400+ hours of documented domain training, not a verbal walkthrough.
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We build dedicated QA by asset type. Sidewalks, crosswalks, and curb ramps each carry different compliance edge cases, so we maintain separate QA reviewers by asset type rather than one generalist reviewer trying to catch everything.
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We document standards and edge cases as they’re resolved. When a requirement changes or an edge case comes up, we update the documentation and retrain the team against the new standard immediately, so the whole team works from a written standard rather than institutional memory.
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We treat your QA as a data input, not an exception. When your own review turns up an issue, that feeds directly back into our documentation and training cycle. The system is built to keep improving through the engagement, not just at kickoff.
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We track compliance performance, not just completion. QA pass rates, rework rates, and turnaround are tracked at the individual level and shared with you, so accuracy problems get caught and corrected while they’re still small.
The result on our Urban Robotics engagement: a QA pass rate that climbed from 74% to 88% over nine months, and a rework rate that dropped from 20% to 10%, both because the numbers were measured and the problems were corrected, not assumed away.
06 / FROM REQUIREMENTS TO DELIVERY
How we build, train, review, and scale your workflow.
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Understand the workflow. Before production begins, we learn your data standards, annotation schema, quality benchmarks, platform, and what a correct deliverable actually looks like. For our Urban Robotics engagement, that meant understanding ADA and PROWAG standards, the client’s proprietary platform, and their asset-specific annotation requirements before a single file was touched.
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Build the team. We assemble people suited to the specific domain and volume profile of the work. Annotation work isn’t generic: the team is matched to the asset types and compliance standards involved.
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Train and calibrate. Every team member completes structured, documented training against the relevant standards before handling live work.
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Produce. Work is distributed across the team, tracked against productivity benchmarks, and managed internally. Production dashboards track individual completion rates, accuracy, and turnaround in real time.
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Internal QA. Dedicated QA reviewers, organized by asset type, check completed work before it’s submitted to you. Failed work is returned for correction before delivery.
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Client review and feedback. Your QA findings and requirement changes get fed back into our workflow documentation and retraining cycle continuously, not just at the start.
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Measure and improve. Performance metrics, including QA pass rates, turnaround times, and remediation rates, are tracked at the individual level and shared with you.
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Scale. When your volume grows, the team grows. Our Urban Robotics engagement scaled from 3 to 26 team members as new municipal contracts were added, without the client having to recruit, train, or supervise anyone themselves.
07 / TOOLS & EXPERTISE
The platforms, methods, and standards behind our work.
We’d rather tell you plainly what we’ve done versus what we’re equipped to do than blur the two together.
Demonstrated, hands-on experience
- ADA and PROWAG standards, applied across ten US municipalities
- Polygon and bounding box annotation, feature classification, and attribute assignment
- Slab-level annotation, obstruction and damage identification
- Proprietary platform-based annotation workflows (working inside a client’s own system rather than requiring a standardized file handoff)
Capabilities our team is equipped to deliver
- Annotation schemas for other infrastructure compliance standards beyond ADA/PROWAG
- Annotation workflows for satellite, aerial, and other street-level imagery types outside the sidewalk/crosswalk/curb ramp domain
Scope, schema, and QA thresholds for every engagement are confirmed with you before work begins.
08 / THE DELTA Precision Group DIFFERENCE
Production-scale annotation backed by domain training and documented QA.
We’re a partner in the compliance outcome, not a vendor for the annotation task.
ADA and PROWAG compliance data often ends up feeding a public agency’s own compliance obligations. That’s not commodity work, and we don’t treat it that way. We built this company as a multidisciplinary team of GIS and engineering professionals with real project experience, because this kind of data deserves people who understand what’s riding on it.
Quality is tracked, not assumed.
Dedicated QA by asset type, documented standards, and performance tracked at the individual level mean problems get caught and corrected while they’re still small. Our QA pass rate improved from 74% to 88% over nine months on a live engagement because we measured it and corrected what wasn’t working.
We deliver on time, not just eventually.
Compliance deadlines and municipal contract timelines aren’t a formality. Across our Urban Robotics engagement, we’ve maintained a 97% on-time delivery rate, including through new contract additions and surge volume, with rush delivery achieved in 24 hours when required.
We scale without becoming a management burden.
Our Urban Robotics engagement grew from 3 to 26 team members across ten municipalities without the client having to recruit, onboard, or manage any of that growth themselves.
09 / FIND THE RIGHT FIT
Choose the engagement model that fits your needs.
Dedicated production capacity
A managed team built and trained around your specific annotation and compliance requirements. We handle recruiting, training, QA, and scaling; you set the standard and review the output.
Project capacity
A defined scope, deliverable, and timeline. We build the right team for the specific project and deliver to your specification.
Surge and overflow support
Additional annotation capacity around an existing workflow during periods of high volume, new contract onboarding, or compliance deadline pressure, scaled back once the surge passes.
Not sure which fits? Tell us what you need annotated and we’ll recommend the right approach.
10 / FAQ
Frequently asked questions.
How do you ensure quality on ADA/PROWAG annotation specifically?
Through dedicated QA by asset type (separate reviewers for sidewalks, crosswalks, and curb ramps), documented standards that every annotator trains against, and performance tracked at the individual level. On our Urban Robotics engagement, this system improved the QA pass rate from 74% to 88% over nine months.
Do your annotators actually understand ADA/PROWAG standards, or are they generalists applying a schema?
Our annotators have received structured training on ADA and PROWAG-related requirements, along with the client’s project-specific standards and annotation guidelines. Our team has completed 400+ hours of documented ADA and PROWAG domain training and applied those standards across ten US municipalities. Training is documented, not verbal, so it’s repeatable as the team scales.
Can you work inside our own platform, or do we need to export data to you?
We adapt to your system. Our Urban Robotics engagement is completed entirely inside the client’s proprietary platform, with no standardized file exports required.
How quickly can you onboard a new annotation engagement?
Onboarding depends on the complexity of the schema and training requirement. For our Urban Robotics engagement, we started with a small team, completed structured training against ADA and PROWAG standards, and ran supervised production before scaling to full capacity. Speed without calibration produces rework, so ramp-up is deliberately structured. A realistic timeline gets confirmed during scoping.
Can you scale up quickly if our volume increases?
Yes, with the constraint that new team members go through the same training and supervised ramp-up as the original team. Our Urban Robotics team scaled from 3 to 26 members across nine months as new municipal contracts arrived, without any drop in the QA system or documentation standard.
11 / Get Started
Ready to add annotation capacity that treats compliance like it matters?
Tell us what you need annotated. We’ll scope the right team and delivery model.