Abstract
The core principles of collecting good quality data from site for creating CCTV inspection reports including some explanations of how to avoid common mistakes.
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The PLR Naming Convention
Most global drainage inspection standards include a system for naming pipes based on either the upstream manhole ID or a combination of both the upstream and downstream manhole IDs. The Manual of Sewer Condition Classification (MSCC) defines the naming convention for WRc pipe and sewer inspection using the Pipe Length Reference (PLR) system at all times:
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The HADDMS inspection standard follows the same PLR Suffix naming convention of Upstream Node plus PLR Suffix, except that it does not X, Y and Z for the PLR Suffix. Instead, it uses a dot and a numeric incremental counter like .1, .2, .3 etc so the MH1X pipe in the diagram above would be MH1.1, MH1Y is MH1.2 and MH1Z is MH1.3.
The HADDMS data format system does not consider the WRc xml file data and specifies its own limits for the number of characters allowed on nodes and pipe IDs, so the use of 2 characters here is of no consequence in this data system.
Other than that, the logic is exactly as described here.
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Good Site Drawings
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Understanding STC25 Manhole References
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