i am pretty new to Geographic-information Systems.

i am interested in gathering information on schools Some days before i have heard that it is interesting to have a closer look at the taginfo-site (see below):

What does this mean https://taginfo.openstreetmap.org/tags/amenity=school

here we have two requests on the above site:

a. yesterday: 2014-06-23 23:58 UTC

Type count Objekts all 

**all:**  592672 0.02% -

[Node] Node 325997 - 0.36%
[Way] Way 260585 - 0.11%
[Relation] Relation 6090 - 0.23%

b. some (guess two or three) days before: we have had the following values:

countl Objekte all: 592 443 0.02%

[Node] Node 325 974 0.36%
[Way] Way 260 384 0.11%
[Relation] Relation 6 085 0.23%

see the details:

today all: 592672 0.02% - some days before: countl Objekte all: 592 443 0.02%

you see: that differs: we have a differende of 229 x (entries, records or some what)

Does this mean that there is a total growth of records of schools or that some records have been changed!?


The difference is the true increase of school entries in the database. It has increased from 592443 to 592672. That's 0,04% increase, and can be considered as normal.

Keep an eye on the time stamp in the upper right corner: at present time, you still see the count from last night.

It might be that someone has retagged some building = school to amenity = school, which is the more common usage.

  • hello dear Andre: Many thanks for the quick reply. As i understand you: These increase in numbers does not rely on corrections or (re-)edits of allready existing records and entries. These difference is the true increase or the absolute count of entries.... - many thanks for the hints. greetings – zero Jun 24 '14 at 18:17

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