24 sec videoPrepare your survey CSV for validation
Match the check template, protect your source values and check the exported text before uploading.
3 min readThe TMH18 Validator learning library
Better survey data.
One clear step at a time.
Articles, practical guides and short videos to help your team prepare files, understand findings and complete the review.
Start here / File preparation
Before your first upload
Match the check template, protect your source values and check the exported text before uploading.
Read the preparation guideA 3 minute guide with a 24 second video overview.
A short visual overview. No sound is needed. The guide includes a text version.
Explore the library
11 resources
24 sec video
24 sec videoWhat errors, warnings and skipped checks mean
Read a validation result in context and decide whether to correct the source, investigate further or record an allowed exception.
3 min read
24 sec videoFrom reviewed survey file to certificate
Understand the co-sign and final certification steps, who can act, and what to include in the handover.
2 min read
24 sec videoChoosing the check template for a TMH 18 survey file
You pick the check template on the upload form. Learn what it controls, what a file type warning means, and how to check a file against the right template.
3 min read
24 sec videoTMH 18 data validation: from survey file to certificate
TMH 18 data validation explained: what version 4 of the standard defines, what TMH18 Validator accepts and checks, and what a certificate does and does not tell you.
3 min read
24 sec videoTMH 18 file format: semicolons, UTF-8 and empty fields
The TMH 18 file format has three record rules: UTF-8 text, a semicolon between fields and no missing fields. See how to follow them and what the check menu offers.
4 min read
24 sec videoWhy every TMH 18 record must fit inside the network kilometres
The TMH 18 network file sets each road's km range. See what the standard says about data outside it, and what TMH18 Validator does not confirm.
4 min read
24 sec videoWhat a TMH18 Validator certificate tells the client
Road survey data certification here is a review decision plus a SHA-256 fingerprint of one file. See what it proves, what it does not, and how to check it.
3 min read
24 sec videoWhen nobody in your team can issue the final certificate
Separation of duties for survey files: who may certify, the warnings TMH18 Validator shows early, and how to invite a second certifier.
3 min read
24 sec videoWhen to record an exception on a finding, and what to write
Record exception clears a finding so a file can move on, but you cannot undo it. See who can use it, what reason to write, and why a Reupload or a new run of the checks drops every exception.
3 min read
24 sec videoWhy an upload is refused before any checks run
A wrong file type, UTF-16 text, an empty file or a file over the size limit is refused before any checks run. Here is how to fix each.
3 min read