Strange values in Berlin

[jjimenezshaw]

I have done a query with these points (part of 17. Juni and Unter den Linden, in Berlin), about 2.5 km long:

[[52.51517622886228,13.360074781555623],[52.515200255747914,13.36045093465729],[52.51522428262036,13.360827087758956],[52.5152483094797,13.361203240860704],[52.51527233632589,13.361579393962371],[52.51529636315898,13.361955547064037],[52.51532038997889,13.362331700165704],[52.51534441678569,13.362707853267409],[52.515368443579334,13.363084006369077],[52.515392470359856,13.363460159470744],[52.51541649712719,13.363836312572452],[52.51544052388145,13.364212465674115],[52.51546455062255,13.364588618775821],[52.51548857735048,13.364964771877489],[52.51551260406533,13.365340924979158],[52.515536630766995,13.365717078080863],[52.51556065745555,13.36609323118253],[52.515584684130935,13.366469384284237],[52.51560871079321,13.366845537385903],[52.51563273744234,13.367221690487607],[52.51565676407836,13.367597843589275],[52.51568079070122,13.367973996690942],[52.515704817310905,13.36835014979265],[52.51572884390751,13.368726302894315],[52.515752870490935,13.36910245599598],[52.51577689706123,13.369478609097689],[52.5158009236184,13.369854762199356],[52.51582495016241,13.370230915301024],[52.51584897669331,13.370607068402729],[52.51587300321107,13.370983221504396],[52.51589702971567,13.371359374606103],[52.51592105620714,13.371735527707768],[52.51594508268548,13.372111680809473],[52.51596910915069,13.37248783391114],[52.51599313560274,13.372863987012808],[52.51601716204167,13.373240140114516],[52.51604118846744,13.37361629321618],[52.51606521488011,13.373992446317846],[52.516089241279595,13.374368599419554],[52.51611326766598,13.374744752521222],[52.51613729403921,13.375120905622886],[52.516161320399306,13.375497058724594],[52.516185346746255,13.375873211826262],[52.516209373080066,13.376249364927968],[52.516233399400754,13.376625518029634],[52.51625742570831,13.377001671131339],[52.51628145200274,13.377377824233006],[52.51630547828399,13.377753977334674],[52.516329504552104,13.378130130436382],[52.516353530807095,13.378506283538087],[52.516377557048955,13.378882436639712],[52.516401583277684,13.37925858974142],[52.51642560949323,13.379634742843127],[52.5164496356957,13.380010895944753],[52.516473661884994,13.38038704904646],[52.51649768806116,13.380763202148167],[52.51652171422419,13.381139355249836],[52.51654574037406,13.381515508351498],[52.51656976651081,13.381891661453205],[52.51659379263446,13.382267814554872],[52.516617818744926,13.382643967656541],[52.516641844842255,13.383020120758246],[52.51666587092646,13.383396273859914],[52.51668989699751,13.383772426961578],[52.516713923055434,13.384148580063286],[52.516737949100204,13.384524733164993],[52.51676197513189,13.384900886266658],[52.5167860011504,13.385277039368326],[52.51681002715575,13.385653192470034],[52.516834053147974,13.386029345571702],[52.5168580791271,13.386405498673364],[52.51688210509306,13.386781651775072],[52.51690613104587,13.38715780487674],[52.51693015698558,13.387533957978407],[52.5169541829121,13.387910111080112],[52.5169782088255,13.38828626418178],[52.517002234725794,13.388662417283445],[52.51702626061291,13.389038570385152],[52.51705028648691,13.389414723486817],[52.517074312347745,13.389790876588524],[52.51709833819547,13.390167029690192],[52.517122364030065,13.3905431827919],[52.517146389851504,13.390919335893564],[52.51717041565982,13.39129548899527],[52.517194441454976,13.391671642096938],[52.517218467237,13.392047795198605],[52.5172424930059,13.392423948300312],[52.517266518761666,13.392800101401978],[52.517290544504256,13.393176254503645],[52.517314570233744,13.393552407605311],[52.51733859595009,13.393928560707018],[52.5173626216533,13.394304713808683],[52.517386647343365,13.39468086691039],[52.51741067302029,13.395057020012057],[52.51743469868407,13.395433173113766],[52.51745872433473,13.395809326215431],[52.51748274997226,13.396185479317095],[52.51750677559663,13.396561632418804],[52.517530801207876,13.39693778552051],[52.51755482680594,13.397313938622176],[52.517578852390926,13.397690091723844]]

and I got these altitudes.

[39.4636283608778,38.37663523375454,37.8117474727712,36.8587289332099,36.261568632375095,36.302250420722146,37.640468798499015,39.37742252085831,39.571180185722824,38.58710670451751,38.50061034211217,38.41411402677318,37.80859016585123,35.7053062258898,34.737519102449205,33.93187076118238,34.972365937083396,36.36425877278345,37,37,36.904438603740275,36.90169304876963,36.41174245990532,33.28808142415757,30.26435673977905,27.732504490400288,29.304312756644322,30.09053824595844,31.225264383707326,31.9567221579376,33.14741974977765,35.10170982831732,37.15730281418516,36.57741909245692,34.388494074414666,32.68836218768638,32.76442810897127,33.165226431612155,33.02149698418768,31.934418118649774,31.582750329237516,32.97016484603955,34.105195722487814,34.64625691176116,33.707897250602855,34.108515371360724,35.51690424158967,38.86784899481819,40.35594072656256,40.74093379059286,38.84248307526127,39.48347603183876,40.858899762751626,42.78131149547926,42.42149240349865,40.504944533200614,37.89832110059069,36.088339869213996,35,35,35.09114146982593,35.01139904986683,34.000649092627235,34.53217049100184,35.605719238692764,36.4867664785329,36.11195932725751,36.42846213591027,37.68618595829436,38.70564405812593,39.73028884103685,40.55115667003429,41.492241086538115,41.9611408379415,42.03505848356576,42.020596819565995,41.753528611322544,41.25221067703415,39.623638655999045,38.99829781569338,38.069775143468654,36.420043803591184,36.498083508144376,38.07993333130052,41.583836750335614,40.58738344462927,39.32678144703971,37.26420126992741,36.76307205084269,36.47032762652448,35.19700308553108,34.50850119774184,34,34,34.55942320955637,36.69139854665887,39.12689955894628,41.252976654644634,41.13219834092781,39.53701842172222,36.91520819566085]

With a max value of 42, and a min of 27.7. That is a difference of 14 m. This street is mainly flat, definitely without that slopes. Do you know why these values?
Thanks