Its names of landscape areas and I used "valley" and "ridge" feature. I used straight lines because at that time mapsforge didn't render text along curved lines well.

Correct.
Unfortunately JOSM doesn't know the "fortification_type" key and doesn't do the auto fill. And I made a typo...
Checked and corrected.
Thank you

I'm using natural=ridge to name mountain massifs and plateaus. So yes they are vague because they're not supposed to be placed exactly on the top of the ridge.
For editing landscape features I aded opentopomap.org layer in JOSM. As far as I know the opentopo is the only map that renders valleys and ridges.

Regards
Matjaž

Pozdravljen,
to seveda počnem na podlagi ortofoto posnetkov v ki so na razpolago v iD spletnem urejevalniku (Bing, Mapbox). In sicer sem najprej opazil na Krasu, da se znotraj gozda nahajajo območja enakega gozda, ki pa na ortofoto posnetkih to očitno niso pač pa prej travnata površina s posameznimi drevesi ponekod tudi z grmičevjem. Tako na prvo roko bi rekel, da bi bila za ta območja bolj primerna oznaka scrub a glede na to, da ta območja mejijo na forest in scrub, sem izbral nekaj tretjega torej heath. Spreminjal sem izključno forest območja, ne izključujem, pa da sem se kje uštel.
Menim, da tako spremenjena območja dajo boljšo sliko o poraslosti terena.
Sicer pa cenim vaš trud in spremljam kako je Slovenija vse bolj pokrita.

L.P. Matjaž