Why not displayed the elevation data in the osm in the converted map?

Using Java OpenStreetMap - Editor, I convert contour.osm into contour.map. As plugins, I use mapsforge-map-writer-master-20180501.133614-216-jar-with-dependencies.jar. The elevation data in the contour.osm is not displayed in the converted contour.map . What's the problem? Do you have any solution about this?

*Some of contour.osm is as following;

<osm version="0.6" generator="Global Mapper"> <bounds minlat="33.728736" minlon="126.356245" maxlat="33.730543" maxlon="126.359227"/> <node id="-534648673" timestamp="2018-04-23T20:09:19Z" uid="217598" user="ajiandachi" version="1" lat="33.7293008513" lon="126.3562448712"/> <node id="-534648674" timestamp="2018-04-23T20:09:19Z" uid="217598" user="ajiandachi" version="1" lat="33.7292933559" lon="126.3562449265"/> <node id="-534648672" timestamp="2018-04-23T20:09:19Z" uid="217598" user="ajiandachi" version="1" lat="33.7293158565" lon="126.3562477517"/> <node id="-534648675" timestamp="2018-04-23T20:09:19Z" uid="217598" user="ajiandachi" version="1" lat="33.7292883733" lon="126.3562479546"/> <node id="-534648676" timestamp="2018-04-23T20:09:19Z" uid="217598" user="ajiandachi" version="1" lat="33.7292846400" lon="126.3562509735"/> <node id="-534648668" timestamp="2018-04-23T20:09:19Z" uid="217598" user="ajiandachi" version="1" lat="33.7293783469" lon="126.3562532728"/> <node id="-534648669" timestamp="2018-04-23T20:09:19Z" uid="217598" user="ajiandachi" version="1" lat="33.7293733500" lon="126.3562533097"/> <node id="-534648677" timestamp="2018-04-23T20:09:19Z" uid="217598" user="ajiandachi" version="1" lat="33.7292809067" lon="126.3562539924"/> <node id="-534648667" timestamp="2018-04-23T20:09:19Z" uid="217598" user="ajiandachi" version="1" lat="33.7293846074" lon="126.3562562179"/> <node id="-534648666" timestamp="2018-04-23T20:09:19Z" uid="217598" user="ajiandachi" version="1" lat="33.7293958649" lon="126.3562591261"/> <node id="-534648671" timestamp="2018-04-23T20:09:19Z" uid="217598" user="ajiandachi" version="1" lat="33.7293433971" lon="126.3562595136"/>

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<way id="-52607" timestamp="2018-04-23T20:09:19Z" uid="217598" user="ajiandachi" version="1"> <nd ref="-534650507"/> <nd ref="-534650508"/> <nd ref="-534650509"/> <nd ref="-534650510"/> <nd ref="-534650511"/> <nd ref="-534650512"/> <nd ref="-534650513"/> <nd ref="-534650514"/> <nd ref="-534650515"/> <nd ref="-534650516"/> <nd ref="-534650517"/> <nd ref="-534650518"/> <nd ref="-534650519"/> <nd ref="-534650520"/> <nd ref="-534650521"/> <nd ref="-534650522"/> <nd ref="-534650523"/> <nd ref="-534650524"/> <nd ref="-534650525"/> <nd ref="-534650526"/> <nd ref="-534650527"/> <nd ref="-534650528"/> <nd ref="-534650529"/> <nd ref="-534650507"/> <tag k="contour_ext" v="elevation_major"/> <tag k="ele" v="80"/> <tag k="contour" v="elevation"/> </way> </osm>