Missing buildings using GeoClimate Tools

[sachabaclet]

Hi,

I have used GeoClimate_Tools-1.0.1 to extract the buildings in the city of Tartu (Estonia). However, I noticed that some buildings were missing from the output building.geojson file.

You can see in the following image the buildings extracted by the tools in pink and the missing buildings in blue.

[ebocher]

Hi @sachabaclet

Please share the json file you are using with GeoClimate so we can debugg it.

Thanks

[sachabaclet]

Here is the geojson file generated by GeoClimate Tools: building.zip

[ebocher]

Oupsss I mean the GeoClimate json config file.

[sachabaclet]

I am using the tool by Samuel Marsault, so this may be what you are looking for: https://github.com/Universite-Gustave-Eiffel/plamade/blob/osm/src/main/groovy/GeoClimate_Script_CL.groovy

[j3r3m1]

Thank you for reporting. Here are the reasons:

1. GeoClimate limitations:

   • The main problem is that they are many buildings declared as garage and we do not take this tag into account. Example with https://www.openstreetmap.org/way/30222793#map=16/58.37659/26.76424 and around as well as https://www.openstreetmap.org/way/30223501 and around: they are garages (https://wiki.openstreetmap.org/wiki/FR:Tag:building=garages?uselang=fr). We should definitely add this tag to our list of tags to be taken into account. By the way they are within a 'landuse' = 'garage' zone, that we should also add to the urban area list.
   • https://www.openstreetmap.org/way/407659360 is a "building"="civic". We should add this tag
   • https://www.openstreetmap.org/way/30235935 is a "building"="service". We should add this tag
   • https://www.openstreetmap.org/way/30222733 is a "building"="manufacture". We should add this tag
   • https://www.openstreetmap.org/way/275474311: it is a permanent tent such as defined here: https://wiki.openstreetmap.org/wiki/FR:Tag:building=tent?uselang=fr --> Question: @sachabaclet should we take them into account for your use ? For climate use @wurtzj ?

2. OSM (or data related) reasons:

   • https://www.openstreetmap.org/way/843573149 is defined as "building"="clinic" but this tag is not an official one for building. @ebocher should we add it anyway ? I would say no
   • https://www.openstreetmap.org/way/1252081355 is known as a construction zone in OSM, not a constructed zone. So this one comes from the OSM "freshness"

[wurtzj]

Hello @j3r3m1,

I think tents should not be added for the moment has it has no thermal inertia, even if it is impervious (which will be considered as road in meteorological models).

[pierromond]

Hello @wurtzj ,

For the acoustic use of geoclimate is important to use every buildings... Maybe a option could be added ?

Best

[wurtzj]

Maybe it could be added in an additional class ? TENT_FRACTION ?

[pierromond]

Oww sorry I didn't see it was about tents ! ... I read too fast. For acoustic use, the tent may not be in extracted buildings !

[ebocher]

Good job inspecteur @j3r3m1 ! GeoClimate's model must satisfy as many uses as possible. Let's take our time before fixing this issue ;-)

[wurtzj]

Hello @j3r3m1 and @ebocher ,

Does Geoclimate take into account building=warehouse ? It seems to me it is lacking.

Cheers,

Jean

[j3r3m1]

Do you have test cases where you observed or suppose it might be missing ? Because it should normally work if the building has the key:value "building:warehouse" (cf. https://github.com/orbisgis/geoclimate/blob/master/osm/src/main/resources/org/orbisgis/geoclimate/osm/buildingParams.json)

[wurtzj]

Here is a harbour near Seine river. Building fraction is 14% but looking at Open Street Map it seems higher to me. But Maybe I'm wrong ?

[j3r3m1]

Not sure I understand the issue. Is the building fraction too low or the fraction of warehouse building ? Because most of the building do not have a tag then they get the tag of the area they are located in (which is industrial). Then there should be a large proportion of industrial buildings I suppose

[wurtzj]

Yes to me building fraction is underestimated. But building fraction do include industrial building ?

[j3r3m1]

Yes of course industrial buildings are considered in the building fraction. Here is the data at RSU scale. I do not think the building fraction is wrong, even though there is a quite high spatial variability.

[wurtzj]

Ok good to know. I think it is a cognitive bias from my side then. Thanks !

[j3r3m1]

I am going to test if we get all buildings from the zone anyway, we might have forgotten some tags (I know understand that it was your initial question...), do not close it yet.

[j3r3m1]

We might think that there are several missing buildings in the area (cf. below)

But actually most of the polygons that look like buildings are construction zones or brownfields and their color is slightly different than the buidings. There is a single building that is missing and need to be added but it is tiny (https://www.openstreetmap.org/way/796915590). Its tag is "building":"storage_tank".

[wurtzj]

Thanks for checking ! :)