Octo prepares
Surveys, calculates, organizes and produces the documents: spreadsheets, reports, drawings and draft legal descriptions.
Deliverable: material ready to checkOcto × Surveying · research of Oct 31, 2026
From RINEX to the legal description, checked at every step.
GNSS post-processing, traverse and network adjustment, documents for rural property certification, terrain models, drone photogrammetry, point clouds and legal descriptions. What can be automated without clicking point by point, and where Octo helps: it reads the field material, writes the script, calculates on a copy and shows residuals and closures. The technical deliverable and the responsibility stay with the licensed professional. The one who signs is still you.
Illustration: topographic survey with traverse, vertices and contour lines, fictional data
Fronts8one page per front of the work
Confirmed30points with a published source across the eight pages
Sources113references listed at the end of the eight pages
01
Octo at work in surveying.
One task from request to approval, at a fictional company. The arms measure, plan and execute; the person in charge checks and approves. Each tab is one front of the field and links to its page.
Octo · task #921 · Agrimensura Coxilha Clara (fictional company)
Front pageGeoreferencing →Drone →Point clouds →
02
One page per front.
With the tools, how they are automated from the command line or by script, where Octo can help and what is confirmed by a published source.
GNSS and post-processing
Base and rover RINEX files, relative and precise point positioning, format conversion and quality control. Octo can process the day's batch and point out what didn't fix, so the person in charge decides what to redo.
Open the page →Total station and adjustment
Field books, traverses, leveling and least-squares network adjustment. Octo can read exported field books, set up the adjustment and highlight suspect observations, with the professional accepting the result.
Open the page →Rural property georeferencing
Technical documents for certification, vertex spreadsheets and overlap checks against neighbors. Octo can build and check the spreadsheets before submission, which stays with the accredited professional in charge.
Open the page →Terrain modeling
Triangulated meshes, grids, contour lines, profiles, cross sections and cut-and-fill volumes. Octo can generate the models and compare two epochs in batch, with the final measurement validated by whoever signs.
Open the page →Drone photogrammetry
Flight planning, ground control points, batch processing, orthomosaic and surface model. Octo can organize the photos and control points and measure processing quality against check points.
Open the page →Point clouds and laser scanning
Terrestrial and airborne scanning, ground classification, filtering, clipping and point cloud conversion. Octo can chain the processing from the command line and summarize what was classified, with the interpretation checked on the ground.
Open the page →Drafting and legal descriptions
Topographic plans, batch drafting, coordinate tables and legal descriptions generated straight from the calculation. Octo can produce the draft and cross-check the text against the spreadsheet, for the professional to review and sign.
Open the page →Open-source software
Free geodesy, surveying and GIS tools that run from the command line on Linux. Octo can show where they complement or replace a step in the current workflow, with the team deciding what to adopt.
Open the page →
03
What it's like to use.
You ask in plain language, the way you would ask a colleague at the office: “process yesterday's RINEX files and tell me which points didn't fix” or “adjust this traverse and generate the legal description”. Octo always follows the same cycle.
- Request
You describe the routine
In natural language, with the result you expect and where the field files are.
- Discovery
It reads the material
What files exist, from which equipment, in what format and in what reference frame, read only.
- Check
Checks reference frame and tolerance
Datum, projection, zone, height type and the required accuracy, before proposing any calculation.
- Plan
Writes the script
Commented, with what it will read, what it will calculate and what it will write.
- Copy
Calculates on a copy
Raw field data stays untouched; everything runs on copies.
- Result
Shows what came out
Residuals, closures, rejected points and differences, for you to check by content.
- Approval
Waits for your yes
Technical documents, submissions to public agencies and signatures only after your approval.
- Record
Keeps it documented
The script, the sources and what was decided are recorded for the next survey.
01
To get started
The exported field files
RINEX, total station field books, point clouds and photos in a folder Octo can read. The original is never changed.
02
For proprietary tools
A machine with the licensed software
When the routine uses a commercial program, it runs on the machine where that program is installed and licensed, through the automation it offers.
03
For open-source tools
Linux or Windows with them installed
Free command-line tools run on a server or an ordinary workstation, in batch and with no per-machine license.
Nothing changes at the start
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Eight arms, one survey.
The same Octo cycle, applied to surveying. Each arm has a narrow role; the ones who choose the method, accept the vertex, sign the deliverable and answer for it are licensed people.
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Discovery
Surveys what already exists
Receivers, total stations, drones and scanners; office programs and versions; where the RINEX files, field books, photos and point clouds are stored, read only.
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Data
Pins down the references
SIRGAS 2000, projection and zone, height type (ellipsoidal, orthometric or normal), IBGE's conversion model and the tolerance the standard or contract requires.
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Security
Looks after access and data
Coordinates, registry numbers and owners' names are personal data: nothing goes to an external service, including AI, without an assessment with the client (LGPD, Brazil's data protection law). Raw field data stays untouched, in a read-only copy.
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Architecture
Chooses the path
The vendor's program or an open tool (RTKLIB, GNU Gama, PDAL, OpenDroneMap, GDAL); relative to the RBMC or IBGE-PPP; grid or triangular mesh; what runs in batch and what stays at the office.
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Development
Writes the batch
Commented scripts, with logging, exit codes, a versioned options file and a test run on a survey the office has already done by hand.
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Review
Checks against a known case
Compares the batch result with the office program's on the same vertex, traverse or volume, by the numbers, not by the absence of errors.
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Release
Delivers to the person in charge
Report, spreadsheet, plan and legal description go to the technical lead. Submission to SIGEF, the registry office or the client is theirs, with their ART or TRT.
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Documentation
Records every survey
The version of each program, reference frame, base used, tolerance and result. What worked for one survey is never assumed ready for another.
Octo works in a support role. It does not accept vertices, does not choose the height type, does not submit to SIGEF, does not sign plans or legal descriptions and does not issue an ART: that belongs to licensed and accredited professionals.
05
What this page is, and what it isn't.
Only what has a published source goes into the field's pages: every point carries its reference, and every page closes with its own list of sources.
30
points with a published source across the field's eight pages, each with its reference on the page itself.
- Illustrations with fictional data
- Plans, maps and diagrams are original SVG drawings. Coordinates, vertices, areas and names do not correspond to real properties, places or people.Caption "Illustration: ... fictional data" on each one
- Standards and versions
- Technical standards, public agency requirements and software versions only appear with a source and a date. Without a source, the page makes no claim.Sources at the end of each page
06
What Octo does, and what stays with you.
Octo prepares everything, but it does not sign. The document of record stays with whoever is accountable for it.
Your team checks
The licensed professional checks what Octo delivered before signing. If something doesn't add up, it goes back to Octo with the correction.
Step: checked by the person who signsWho signs
Octo does not sign. Designs, technical reports, ART/RRT, statements of account and any official document are still signed by the licensed professional at the company or agency: here, the surveying or cartographic engineer with an ART filed with CREA, or the surveying technician with a TRT filed with CRT; for rural properties, the professional accredited by INCRA, who submits to SIGEF.
Signature: licensed professional, with ART or TRT
07
Sources.
Primary sources, consulted on Oct 31, 2026. Each page in the field closes with its full list.
- IBGE: RBMCNetwork of GNSS reference stations and data for post-processing
- IBGE: IBGE-PPPOnline precise point positioning service
- IBGE: hgeoHNOR2020Conversion of GNSS ellipsoidal height to the SGB vertical datum
- INCRA: Technical Manual for the Georeferencing of Rural Properties, 2nd ed.Vertex codes, methods, accuracies and SIGEF documents
- INCRA: property certificationCertification workflow through SIGEF
- ABNT: catalog (NBR 13133:2021)Execução de levantamento topográfico — Procedimento
- ANAC: Resolution No. 805/2026Approves RBAC 100, which replaced RBAC-E 94 for drones
- RTKLIB: releasesLast official release 2.4.3 b34, published on Jan 6, 2021
- PDAL: releases2.10 line, with the M3C2 point cloud comparison filter
- GNU Gama: published versionsLeast-squares adjustment of geodetic networks; 2.33, from Jan 31, 2025
Which step holds up your surveying office?
The assessment starts by reading a survey your team has already done, without changing anything. You get the map of what can be automated, with a test run on a known case, and you decide with that in hand.