[Talk-ca] Flood Mapping in BC

[Nate Wessel]

I agree with regard to very short term closures e.g. for parades, 
marathons, but I imagine we're talking here about closures that could 
have impacts for weeks to months, and would have dramatic implications 
for routing especially. IMO it's on any service providers to update 
their data in a timely way, including data from OSM.

My main criteria, personally, for including these sorts of changes in 
OSM is whether the person making the edit that closes a road (etc) 
because of damage, construction, is also planning to make a timely edit 
to reopen that road when the time comes. Better to leave it as is if 
there isn't anyone watching for the reopening. But if someone wants to 
watch the situation closely and make the map mirror reality, I say go 
for it.

Cheers,

Nate Wessel
Cartographer, Planner, Transport Nerd
NateWessel.com <https://www.natewessel.com>

On 2021-11-17 2:26 p.m., Martin Chalifoux via Talk-ca wrote:
> OSM is not designed to map elements that change in time such is 
> traffic, construction. There is no way to set start and end dates to 
> element for example. It is a database that gets *duplicated* in tons 
> of services be it online services that render OSM data, or apps on 
> smartphones, etc. These services take a snapshot and then may not 
> update again for months, a year, who knows. When people put elements 
> that expire quickly, such as maintenance construction (OSM 
> construction tags exists but are designed for new roads being built, 
> not repairs), then there temporary elements are expires and removed, 
> they remain in all the other services. It makes the OSM data 
> unreliable. You add a bit of short time accuracy but even more long 
> time inaccuracy.  Anyhow I presonnaly advocate agains adding broken 
> roads to the OSM database. Road closures are the responsibility of the 
> rendering engines and they must get that info from other sources than 
> the map database and then add it as a layer. OSM is the map layer, 
> then traffic, closures, weather, etc. are better treated as completely 
> independant layers.
>
> My take anyway, Martin.
>
>
>
>> On Nov 17, 2021, at 13:55, Joel <joel at joelmcfaul.ca 
>> <mailto:joel at joelmcfaul.ca>> wrote:
>>
>> Hi everyone,
>>
>> Numerous major highways have been washed out or blocked due to recent 
>> flooding in BC. Does this community have any thoughts about 
>> reflecting these changes in OSM? I assume most of these closures will 
>> be temporary, however are significant and may last for months.
>>
>> Thank you,
>> Joel
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