Graded
Calibration that tells you how good it is
Two points fit a similarity transform; three or more fit a least-squares affine with residuals, graded Good, Warning or Distorted, so a stretched scan is caught before you measure from it.
Puck
Stop measuring plats with a PDF ruler. Calibrate, close traverses and draft in survey coordinates.
Puck is a PDF workspace for land surveyors. Calibrate a plat to survey coordinates, mark up and measure, draft on the sheet, close a traverse from its calls, OCR the sheet, and export DXF, GeoJSON or CSV.
35 CAD tools on the sheet
Graded least-squares calibration
Off AI until you turn it on
Standouts
Why Puck.
Closure
From the plat's calls to a closed traverse
Highlight or type the calls and Puck reports the closure ratio, area, a verdict and the worst call. Drafting to CAD waits until the sheet is calibrated and the closure is acceptable.
35
Real CAD on the sheet
Thirty-five drafting tools work on the calibrated page, so the linework you trace is already in easting and northing when it leaves as DXF.
AI that asks first
Every AI feature is off until you turn it on. Puck shows what it will send before each request, honors cost caps and an administrator lock, and keeps an audit log that holds no keys, prompts or images.
OCR tuned for bearing calls
Offline OCR has a mode built for bearings and distances, and Claude OCR is there when you choose to use it.
Your markups stay honest
If the source PDF changes underneath your markups, Puck blocks sensitive outputs until you review the change.
Overview
Built for survey plan sheets, not generic PDF review.
Open plats, boundary surveys and engineering drawings in a workspace made for them: calibrate to survey feet, mark up with intent, and pull structure from the sheet instead of retyping it.
Calibrate the sheet to survey space
Place control points, fit a similarity or least-squares affine transform, and read easting and northing live on the page.
Draft and close a traverse
Draft from the calls on the sheet and check closure, ratio and area locally before anything goes to CAD.
Hand off coordinates, not screenshots
Export DXF and GeoJSON in survey coordinates, CSV takeoff registers, and searchable OCR PDFs.
Features
What Puck does.
Markup on a calibrated page
Lines, clouds, callouts, stamps, counts, dimensions, highlights and measurements on the same page as your drafting, organized with layers, Tool Chest presets, comments, review status and attachments.
- Layers, spaces and Tool Chest presets
- Comments, review status and attachments
- Search across text, OCR and markups
Survey coordinates on the PDF
Two points give a similarity transform; three or more give a least-squares affine with residuals and a quality grade. Read easting and northing anywhere on the sheet.
- Similarity or least-squares affine
- Residuals and a Good / Warning / Distorted grade
- Scale presets and live E/N readout
Measure what the sheet shows
Distance, area, angle, radius and count tools on the calibrated page, with takeoff registers you can export to CSV or bring into Excel.
- Distance, area, angle, radius and count
- CSV registers and Excel Power Query export
From metes and bounds to a closed traverse
Highlight or type the calls and Puck computes closure locally: ratio, area, a verdict and the worst call. Manual mapping walks the traverse call by call.
- Closure ratio, area and verdict
- The worst call, flagged
- Send to DXF or to CAD once it closes
CAD drafting right on the sheet
Thirty-five tools to draw, modify and annotate, with a command line, snaps and a curve solver, and a DXF drawing kept for each page.
- Draw, modify and annotate tools
- Command line, snaps and curve solver
- Drafting in the calibrated frame
Text you can search and reuse
Offline Tesseract OCR with a mode tuned for bearing calls, or Claude OCR when you turn it on, and export a searchable PDF.
- Offline OCR with a bearing-call mode
- Optional Claude OCR
- Searchable PDF export
Work the whole drawing set
Compare revisions as images or text with registration and batch reports, organize drawing sets with slip sheets and review sessions, and merge, split, insert, rotate or crop pages.
- Image and text compare with batch reports
- Drawing sets, slip sheets and review sessions
- Merge, split, insert, rotate and crop pages
Claude reads the plan; you keep the judgment
Select a region and Puck asks Anthropic's Claude to find lot lines, easements, right-of-way, monuments and callouts. You accept or reject each feature before it becomes markup.
- Off by default; uses your own Anthropic API key
- A disclosure before every request
- Cost caps, an admin lock and an audit log
Specifications
Files and system requirements.
Opens
Saves and exports
- DXF (R12)
- GeoJSON
- CSV
- PNG
- PDF with markups
- Searchable PDF
System requirements
| Component | Minimum | Recommended |
|---|---|---|
| Operating system | Windows 10, 64-bit | Windows 11 |
| Memory | 8 GB | 16 GB |
| Disk | 500 MB | SSD |
| Display | 1920 × 1080 | — |
| Graphics | No dedicated GPU needed | — |
| AI features | Optional: an internet connection and your own Anthropic API key | — |
Questions
About Puck.
What makes Puck different from a normal PDF viewer?
Puck is built for survey plan sheets: calibrate pages to easting and northing with a graded fit, mark up and measure, draft on the sheet, close a traverse from its calls, and export DXF or GeoJSON in survey coordinates.
Does Puck send my drawings anywhere?
Only when you use a Claude feature, such as AI extraction or Claude OCR. Those stay off until you add your own Anthropic API key, Puck shows what it will send before each request, and every request is logged. Offline OCR, calibration, markup, COGO and drafting run on your machine.
What can I export?
DXF and GeoJSON in survey coordinates, CSV takeoff registers, PNG images, PDFs with your markups burned in, and searchable OCR PDFs.
Get Puck
Read a plan the way a surveyor would.
Puck is part of the launch release and is included in every Founders license.