Legacy Sites

  • Last Post 2 weeks ago
Hank posted this 3 weeks ago

What sort of sites are these MIDAS, TMU or TAME?

If any site becomes decommissioned and no longer in the model will these be refereed to as "legacy trads sites" even though they were being used in webtris as well? 

What's the difference between an inactive site and an inactive legacy site?

Surely leaving them as an inactive TMU for instance would then help users like myself identify the site type?


Could there be a possibility of an active legacy site? If not why is this an option to be filtered by?

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Paul Watkins posted this 2 weeks ago


To provide some context ... when WebTRIS was first implemented it had data from April 2015 onwards. A project went ahead in 2016 to add historic data from TRADS which provided the historic data you'll see in the MIDAS/TAME/TMU layers.

In 2017 James (you'll have noticed his name on the forum, has moved on) noticed some TRADS data was missing from WebTRIS and a smaller project went ahead to rectify this. Most of the sites went into their respective MIDAS/TAME/TMU layers but there were 2398 sites which weren't so easy to either map, or be confident of their source type. Those sites were moved into the Legacy layer and not given any site type.

The Active and Inactive status is dependant on whether the site is in the current network model. If a site has dropped off the model it'll shift to be Inactive, if it's in the model it's Active. Additionally if a new site becomes active we wait until the next major model deployment before we include it so there's a period of time where the site is recording, but not on WebTRIS.

Agree the active legacy site filter shouldn't be there. I've asked our developer to look at removing it.


Hank posted this 2 weeks ago

So for clarity, there should be no new sites in the legacy data set?

As for identifying the sites, all of the ones on the M42 are MIDAS by definition for example. Indeed, cross referencing them with the data held by your contractor Motts would enable a simple look up to identify the type...

Since the update however, there are now sites which are mapped as "legacy" where before they were another type. How can that occur given what you have said?

Paul Watkins posted this 2 weeks ago

Do you have an example of where it's moved? There shouldn't be as they were simply missing before unless some sort of error occurred during the mapping process.


Hank posted this 2 weeks ago

Surely this should be checked as part of the model import?

A5034, these were formerly in webtris as TMU sites if I recall correctly, they are now legacy sites. There maybe others but my Manchester Airport model is the one I'm working on.

Paul Watkins posted this 2 weeks ago

Yes, validation was performed on the data before it was uploaded.

I've looked at 6 sites on the A5034. 4 of them are TMU sites, still listed as TMU and reporting as expected. 2 legacy sites were added and they have data consistent with them being marked as legacy sites (not reported since 2010). So nothing I can see there indicating a change, unless where I'm seeing legacy sites there were different sites there previously and it was recording data post 2015 -- is that what you saw?