I'm from Luxembourg and i map essentially natural elements. I'm also interested by historical elements in nature such as former industrial zones, archeological sites, folklore... Sometimes specific urban elements I am aware of. My main motivations for mapping are exploration, mountain biking/hiking/trail running and share interesting places.
Mapping & personal statistics
Areas on map and statistics where i contributed but oddly not all is shown on the the map like Grengewald, Bambesch, Petite Suisse & others. Luxembourg is a very small country so its different borderlands with Belgium, Netherlands, Germany and France are very close to each other.
Areas that I mapped extensively with other users are :
● All natural areas in the south borderland of Lu / Fr, called "Terres Rouges" (Redlands)
● Grengewald (Lu)
● Petite Suisse (Lu)
● some Bambesch (Lu)
Areas that i mapped nearly alone :
● former industrial zone Micheville (Fr)
● Bois de Butte (Fr)
Areas that i plan developing/detailing:
● Bois de Gaume (Be)
● North of Luxembourg
● North of Trier (De, meantime a lot of Germans have already done a great work)
Feel free to contact me, i am opened to any discussion. If you have recommendations or you think that I am mapping incorrectly a type of element, please do not hesitate to tell me (kindly ^^). Nevertheless, most often i check OSM's Wiki.
Regarding areas, mappers should really consider taking the advantages of the MultiPolygons based on relations for many beneficial reasons:
● no need to waste time in plotting several times the same segment side of several elements, this means only one segment shared between several elements, example: barrier separating 2 areas, segment perimeter of one of those 2 areas, same segment perimeter but from another adjacent area, further covering area such as a natural reserve...
● you can use any element already plotted in OSM whether it is a simple area (cut a node to convert the area in MP), highways, waterways, barriers, even buildings...
● eases future updates/additions of elements
● saves time: more OSM production or more free time
● less data (less nodes and less multiple overlapping lines)
At first work out with simple MPs but soon enough you will be able to create complex areas way more easily than with the primitive method. Granted you will have to adapt to a new process of work because it is trickier. So it is prone to errors, because this entails keeping track of which lines you are working with and make sure nodes are connected. Advice: to differenciate several MP of the same kind, just use temporary names or give it its official name (schools, parks, pedestrian squares, industrial zone...)
● 8 shaped MP, in other words several areas part of the same MP but touching themselves only at 1 node (hence the "8 shape" name i gave) some of the areas will sometimes not render, depending of some factors (size, tagging...?)
● some line elements inside MP "highway areas" will not render, you can still make sure to render simple areas such as buildings, it just needs an inner relation. My guess is that highways have the highest priority of rendering over all other elements and coders didn't think of this issue yet.