De source is gewoon PDOK.^

Hey there,

Be sure to square buildings where appropriate. Press Q or right click an object and select the Square option.

Also, try to make your changeset more descriptive, for example "added buildings", if possible.
You do not have to add "not in data" to your changeset. If you are adding something not yet on the map, you are always adding something which is "not in data".

Merry christmas in advance and have fun mapping!

Hey there,

Square objects by pressing the Q button or right clicking on an object and then clicking the Square option.

Also, look carefully at the imagery. It is not likely you will find a building directly behind another building, unless there is a street to access said building. There is only one building here. The line in the middle of this building on the imagery is a rooftop/edge (of a material; buildings may use metal plates as roofing) or line. You shouldn't map these unless you know what the feature represents.
(Once you become more familiar with the editor and such features, you can try simple 3D tagging:
osm.wiki/Simple_3D_buildings#Roof
Fyi, this is usually not meant to be mapped and will only show up on 3D renderers outside of the OSM site.)

Happy christmas in advance and have fun mapping!

No problem. Have fun mapping and merry christmas in advance!

The hashtag suffices :)

Hey there,

Don't forget to square square buildings. You can square square buildings by selecting them and hitting the "Q" button in iD. Or, by (shift) right clicking on the object(s) and clicking "Square".
Note, you may need to manually adjust corners to be more square before you can square them (L-shaped and more complex buildings).

You can check the Help menu in the right sidebar in iD for more hotkeys.
Once you feel comfortable with iD, you can switch to a more advanced editor such as JOSM which will give you more options and help to avoid common problems like nodes sticking to ways you don't want them to stick to.

Hey there,

Try to draw the whole building, even if it's partially covered by vegetation or if the imagery is slightly unclear/not of a high enough resolution. If you're unsure if a building is 1 or more buildings, draw it as 1 building.
Also, feel free to check your contributions with other imagery layers. You can find them in the "Imagery" menu at the top of JOSM. See also:
https://josm.openstreetmap.de/wiki/Help/Menu/Imagery

I'll leave the buildings you mapped as-is. I'm personally more focused on landuse and error fixing.

Hey there,

Try to add a descriptive summary to your changesets. This helps other contributors understand what you want to do.
Something like "added landuse" is fine.

No problem.

You can add a tag "source" and a source "local knowledge" to your changeset when saving it to OSM. You can also add a source "survey" if you have very recently surveyed (visited) the object.

Je kan in de beschrijving aangeven dat je een fout oplost. OSM inspector is in principe gewoon een foutmelder en dat weten de meeste mensen wel. Anders kunnen ze het altijd opzoeken om dat te zien.
Je kan altijd aangeven dat je OSM Inspector, Osmose, JOSM Validator etc. gebruikt als bron.

Mij maakt het niets uit of je het uiteindelijk ook wel/niet invult. Anderen kan het altijd helpen om te weten welke bronnen en lagen je gebruikt voor je bewerkingen, dus vul het vooral in als je het niet kan laten.

Hey there,

What is the source you are using for the peak's name?
Be sure to read osm.org/copyright concerning the use of data from elsewhere.
(tldr; you can not use data from elsewhere without the right license)

Hey Leo,

"foutmelding" is geen bron (source), of het moet de naam van een programma of laag zijn die je hebt gebruikt. De programma of laag geeft zelf de foutmelding aan en jij moet die foutmelding dan interpreteren.
Dit hoef je dan ook niet op te schrijven.

Hey there,

Try to add a descriptive summary for your changesets. This helps other mappers understand what you want to do.

In iD, you can do so by
- selecting the object and hitting the Q button; or
- right clicking the object and then clicking the square icon.

PS: sorry for the additional message.

Hey there and welcome,

Be sure to square your square buildings. Square buildings are square :)

Hey there and welcome,

For this project, mapping is restricted to Buildings Mapping only.
Each project has its own focus area. Be sure to look at the project's instructions.

You'll find objects being created with different imagery more often. From your changeset, it doesn't look like the way was touching any buildings. It might be better to leave the road be as is in this case.

Hey there and welcome,

Try drawing the whole building, even if it is partially covered by vegetation. I've already done so for this building.

1) Dat is gewoon landuse=grass.

Leisure=park is voor bv. De Blauwe Bergen, gewoon wat grotere publieke parken.

2) Zolang dat stuk gras niet privé is kan het op de kaart blijven staan.

De meest bekende achtertuin is die achter een huis.
leisure=garden

3) Dat is gewoon nog zo'n stuk landuse=grass. Ik bedoel de heg voor de flat bij 2).

Een privé tuin bij een huis/flat kan je beter niet taggen. Publieke tuinen en tuinen bij bedrijven kan je nog wel taggen met leisure=garden.

Ik ben nou niet de "crossing" expert, dus als er iets op aan te merken valt (tag voor de node op weg of andersom bijvoorbeeld), laat het me weten. Er valt vgm nog flinkt wat te taggen met crossings in de buurt.