{"id":13380,"date":"2016-06-17T18:55:35","date_gmt":"2016-06-17T17:55:35","guid":{"rendered":"https:\/\/www.locusmap.app\/2016\/06\/17\/all-you-wanted-to-know-about-elevation-in-locus\/"},"modified":"2016-06-17T18:55:35","modified_gmt":"2016-06-17T17:55:35","slug":"all-you-wanted-to-know-about-elevation-in-locus","status":"publish","type":"post","link":"https:\/\/www.locusmap.app\/cs\/all-you-wanted-to-know-about-elevation-in-locus\/","title":{"rendered":"V\u0161echno, co jste kdy cht\u011bli v\u011bd\u011bt o nadmo\u0159sk\u00e9 v\u00fd\u0161ce v Locusu (ale b\u00e1li jste se zeptat)"},"content":{"rendered":"<p><p>Nadmo\u0159sk\u00e1 v\u00fd\u0161ka, v\u00fd\u0161ka nad ter\u00e9nem, optimalizace m\u011b\u0159en\u00ed v\u00fd\u0161ky&#8230; ot\u00e1zek na tato t\u00e9mata je na na\u0161em <a href=\"http:\/\/help.locusmap.eu\" target=\"_blank\" rel=\"noopener noreferrer\">helpdesku<\/a> nep\u0159ebern\u00e9 mno\u017estv\u00ed. M\u011b\u0159en\u00ed, optimalizace nebo zobrazov\u00e1n\u00ed nadmo\u0159sk\u00e9 v\u00fd\u0161ky je sice docela podrobn\u011b pojedn\u00e1no v na\u0161em <a href=\"https:\/\/docs.locusmap.eu\/doku.php?id=cz:manual:user_guide:tools:altitude\" target=\"_blank\" rel=\"noopener noreferrer\">Manu\u00e1lu<\/a>, nicm\u00e9n\u011b naroubovat such\u00fd technick\u00fd text na b\u011b\u017en\u00e9 probl\u00e9my denn\u00edho pou\u017e\u00edv\u00e1n\u00ed Locusu se m\u00e1lokomu poda\u0159\u00ed. Proto v\u00e1m p\u0159in\u00e1\u0161\u00edme n\u00e1sleduj\u00edc\u00ed text, kter\u00fd odpov\u00edd\u00e1 alespo\u0148 na ty nej\u010dast\u011bj\u0161\u00ed dotazy, kter\u00e9 n\u00e1m pos\u00edl\u00e1te.<\/p>\n<h2>Jak Locus m\u011b\u0159\u00ed nadmo\u0159skou v\u00fd\u0161ku?<\/h2>\n<p>Prim\u00e1rn\u011b Locus z\u00edsk\u00e1v\u00e1 \u00fadaje o va\u0161\u00ed nadmo\u0159sk\u00e9 v\u00fd\u0161ce z GPS va\u0161eho telefonu nebo tabletu. Ze sign\u00e1lu GPS lze toti\u017e vypo\u010d\u00edtat nejen va\u0161i &#8222;horizont\u00e1ln\u00ed&#8220; polohu, ale p\u0159i v\u011bt\u0161\u00edm po\u010dtu dostupn\u00fdch satelit\u016f tak\u00e9 tu &#8222;vertik\u00e1ln\u00ed&#8220;. Pokud v\u00e1\u0161 telefon nebo tablet disponuje tak\u00e9 <a href=\"https:\/\/docs.locusmap.eu\/doku.php?id=cz:manual:user_guide:tools:altitude#tlak\" target=\"_blank\" rel=\"noopener noreferrer\">barometrem<\/a>, Locus za\u0159azuje do v\u00fdpo\u010dtu v\u00fd\u0161ky tak\u00e9 \u00fadaje z jeho \u010didla. Pokud nem\u00e1te barometr a ani nejste v dosahu GPS (nap\u0159\u00edklad uvnit\u0159 budovy), Locus zobrazuje v\u00fd\u0161kov\u00e9 \u00fadaje ter\u00e9nu z tzv. HGT nebo SRTM soubor\u016f, kter\u00e9 si st\u00e1hne z internetu (p\u0159i stahov\u00e1n\u00ed LoMap, tvorb\u011b tras nebo bod\u016f). Tyto soubory jsou voln\u011b p\u0159\u00edstupn\u00e9\u00a0a\u00a0obsahuj\u00ed data nam\u011b\u0159en\u00e1 mj. americkou agenturou NASA. Nejsou v\u0161ak p\u0159\u00edli\u0161 podrobn\u00e9, tak\u017ee \u00fadaje z nich jsou pouze orienta\u010dn\u00ed.<\/p>\n<figure id=\"attachment_9559\" aria-describedby=\"caption-attachment-9559\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/www.viewfinderpanoramas.org\/Coverage%20map%20viewfinderpanoramas_org3.htm\"><img decoding=\"async\" class=\"size-full wp-image-13382\" src=\"https:\/\/www.locusmap.app\/wp-content\/uploads\/altitude01.png\" data-fancybox><\/a><figcaption id=\"caption-attachment-9559\" class=\"wp-caption-text\">Rozlo\u017een\u00ed datov\u00fdch bal\u00edk\u016f se SRTM daty na webu Viewfinderpanoramas.org<\/figcaption><\/figure>\n<h2>Pro\u010d se \u00fadaje o nadmo\u0159sk\u00e9 v\u00fd\u0161ce v pap\u00edrov\u00e9 map\u011b nebo na cedul\u00edch\u00a0v ter\u00e9nu li\u0161\u00ed od \u00fadaj\u016f nam\u011b\u0159en\u00fdch Locusem?<\/h2>\n<p>Nadmo\u0159sk\u00e9 v\u00fd\u0161ky nap\u0159\u00edklad vrchol\u016f hor, kter\u00e9 vid\u00edme na map\u011b nebo na turistick\u00fdch sm\u011brovn\u00edc\u00edch, jsou z\u00edsk\u00e1ny profesion\u00e1ln\u00edm zam\u011b\u0159en\u00edm kartografick\u00fdmi nebo geografick\u00fdmi odborn\u00edky s pat\u0159i\u010dn\u00fdm vybaven\u00edm. Locus m\u00e1 k dispozici p\u0159ece jen \u00fadaje ze senzor\u016f b\u011b\u017en\u00e9ho telefonu, jejich\u017e nam\u011b\u0159en\u00e9 hodnoty nemus\u00ed b\u00fdt stejn\u011b p\u0159esn\u00e9. O to v\u00edce to plat\u00ed o \u00fadaj\u00edch z offline soubor\u016f SRTM.<\/p>\n<h2>Um\u00ed Locus nam\u011b\u0159en\u00e9 hodnoty nadmo\u0159sk\u00e9 v\u00fd\u0161ky n\u011bjak zp\u0159esnit?<\/h2>\n<p>Ano, a\u00a0to hned n\u011bkolika zp\u016fsoby, kter\u00e9 lze spravovat ve <a href=\"https:\/\/docs.locusmap.eu\/doku.php?id=cz:manual:user_guide:tools:altitude\" target=\"_blank\" rel=\"noopener noreferrer\">Spr\u00e1vci m\u011b\u0159en\u00ed nadmo\u0159sk\u00e9 v\u00fd\u0161ky<\/a> (Nastaven\u00ed &gt; GPS a pozice &gt; Korekce nadmo\u0159sk\u00e9 v\u00fd\u0161ky):<\/p>\n<ul>\n<li><strong>Optimalizace GPS v\u00fd\u0161kov\u00fdmi daty<\/strong> &#8211; \u00fadaje z chipu GPS maj\u00ed docela \u010dasto velkou odchylku, zejm\u00e9na v situac\u00edch s hor\u0161\u00edm v\u00fdhledem na oblohu. Za\u0161krtnut\u00edm t\u00e9to mo\u017enosti odchylky korigujete sta\u017een\u00fdmi offline SRTM daty.<\/li>\n<li><strong>Filtr nadmo\u0159sk\u00fdch v\u00fd\u0161ek<\/strong> &#8211; dal\u0161\u00ed mo\u017enost korekce odchylek GPS za pomoci jejich zpr\u016fm\u011brov\u00e1n\u00ed. Lze navolit 5 stup\u0148\u016f filtrace od nejleh\u010d\u00ed a nejrychlej\u0161\u00ed po velmi t\u011b\u017ekou, vy\u017eaduj\u00edc\u00ed del\u0161\u00ed \u010das na v\u00fdpo\u010det\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter size-full wp-image-9560\" src=\"https:\/\/www.locusmap.app\/wp-content\/uploads\/altitude02cz.png\" alt=\"\" width=\"350\" height=\"622\" srcset=\"https:\/\/www.locusmap.app\/wp-content\/uploads\/altitude02cz.png 350w, https:\/\/www.locusmap.app\/wp-content\/uploads\/altitude02cz-169x300.png 169w\" sizes=\"(max-width: 350px) 100vw, 350px\" \/><\/li>\n<li><strong>Odsazen\u00ed nadmo\u0159sk\u00e9 v\u00fd\u0161ky<\/strong> &#8211; nadmo\u0159sk\u00e1 v\u00fd\u0161ka, vypo\u010d\u00edtan\u00e1 GPS chipem telefonu, je z\u00edsk\u00e1na jinou metodou reference povrchu Zem\u011b ne\u017e se pou\u017e\u00edv\u00e1 v map\u00e1ch. Doch\u00e1z\u00ed tedy k ur\u010dit\u00e9mu odsazen\u00ed, kter\u00e9 lze n\u011bkolika zp\u016fsoby korigovat. \u00a0Nejp\u0159esn\u011bj\u0161\u00ed je <strong>ru\u010dn\u00ed korekce<\/strong>, kterou pou\u017eijte ov\u0161em pouze v p\u0159\u00edpad\u011b, \u017ee zn\u00e1te p\u0159esnou hodnotu odsazen\u00ed v ur\u010dit\u00e9m m\u00edst\u011b na Zemi. V na\u0161ich podm\u00ednk\u00e1ch mobiln\u00edch telefon\u016f je velmi dob\u0159e pou\u017eiteln\u00e1 <strong>automatick\u00e1 korekce<\/strong> Locusu, kter\u00e1 odsazen\u00ed nastav\u00ed podle celosv\u011btov\u00e9ho modelu geoidu. Pokud va\u0161e za\u0159\u00edzen\u00ed um\u00ed spr\u00e1vn\u011b interpretovat zpr\u00e1vy NMEA s v\u00fd\u0161kov\u00fdmi parametry geoidu, m\u016f\u017eete pou\u017e\u00edt t\u0159et\u00ed mo\u017enost. Doporu\u010dujeme ale pouze zku\u0161en\u00fdm u\u017eivatel\u016fm, kte\u0159\u00ed v\u011bd\u00ed, co d\u011blaj\u00ed.\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-9561\" src=\"https:\/\/www.locusmap.app\/wp-content\/uploads\/altitude03cz.png\" alt=\"\" width=\"350\" height=\"622\" srcset=\"https:\/\/www.locusmap.app\/wp-content\/uploads\/altitude03cz.png 350w, https:\/\/www.locusmap.app\/wp-content\/uploads\/altitude03cz-169x300.png 169w\" sizes=\"(max-width: 350px) 100vw, 350px\" \/><\/li>\n<li><strong>Tlak<\/strong> &#8211; jak jsme ji\u017e psali v \u00favodu, mnoh\u00e1 za\u0159\u00edzen\u00ed disponuj\u00ed barometrick\u00fdm m\u011b\u0159i\u010dem atmosf\u00e9rick\u00e9ho tlaku.\u00a0Takov\u00e9 tlakom\u011bry m\u011b\u0159\u00ed velmi p\u0159esn\u011b, co\u017e lze pou\u017e\u00edt p\u0159i v\u00fdpo\u010dtu relativn\u00edch zm\u011bn nadmo\u0159sk\u00e9 v\u00fd\u0161ky. Tzn. pokud zn\u00e1te hodnotu atmosf\u00e9rick\u00e9ho tlaku v ur\u010dit\u00e9 nadmo\u0159sk\u00e9 v\u00fd\u0161ce, m\u016f\u017eete vypo\u010d\u00edtat zm\u011bny nadmo\u0159sk\u00e9 v\u00fd\u0161ky mezi zn\u00e1mou a aktu\u00e1ln\u00ed pozic\u00ed. Takov\u00fd tlakom\u011br je ale pot\u0159eba <strong>nakalibrovat<\/strong>, tj. zadat mu v\u00fdchoz\u00ed hodnotu. A\u00a0Locus nab\u00edz\u00ed hned n\u011bkolik metod: <strong>automatiku<\/strong>, kdy se vych\u00e1z\u00ed z hodnot GPS, <strong>ru\u010dn\u00ed zad\u00e1n\u00ed tlaku<\/strong> p\u0159epo\u010dten\u00e9ho na hladinu mo\u0159e a nebo <strong>zad\u00e1n\u00ed konkr\u00e9tn\u00ed nadmo\u0159sk\u00e9 v\u00fd\u0161ky<\/strong> na konkr\u00e9tn\u00edm m\u00edst\u011b. To je samoz\u0159ejm\u011b nejp\u0159esn\u011bj\u0161\u00ed, ale relevantn\u00ed pouze m\u00edstn\u011b.\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-9562\" src=\"https:\/\/www.locusmap.app\/wp-content\/uploads\/altitude04cz.png\" alt=\"\" width=\"300\" height=\"533\" srcset=\"https:\/\/www.locusmap.app\/wp-content\/uploads\/altitude04cz.png 300w, https:\/\/www.locusmap.app\/wp-content\/uploads\/altitude04cz-169x300.png 169w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/li>\n<\/ul>\n<h2>Pro\u010d se mi na m\u00edst\u011b kurzoru nezobrazuje dynamick\u00e1 nadmo\u0159sk\u00e1 v\u00fd\u0161ka?<\/h2>\n<p>\u00dadaje pro dynamickou v\u00fd\u0161ku se stahuj\u00ed bu\u010f online z Googlu anebo offline ze sta\u017een\u00e9ho souboru s v\u00fd\u0161kov\u00fdmi daty (SRTM). Tak\u017ee bu\u010f nejste online nebo nem\u00e1te sta\u017een soubor s v\u00fd\u0161kov\u00fdmi daty dan\u00e9ho \u00fazem\u00ed. Jak z\u00edskat SRTM data zjist\u00edte v na\u0161em <a href=\"https:\/\/docs.locusmap.eu\/doku.php?id=cz:manual:faq:how_to_add_map_shading\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Manu\u00e1lu<\/strong> &gt;&gt;<\/a><\/p>\n<h2>Importoval jsem si n\u011bjak\u00e9 body z internetu. Pro\u010d mi u nich Locus nezobrazuje jejich nadmo\u0159skou v\u00fd\u0161ku?<\/h2>\n<p>Z\u0159ejm\u011b nem\u00e1te ulo\u017eena v\u00fd\u0161kov\u00e1 data oblasti, kde se body nach\u00e1zej\u00ed. St\u00e1hn\u011bte si je podle <a href=\"https:\/\/docs.locusmap.eu\/doku.php?id=cz:manual:faq:how_to_add_map_shading\" target=\"_blank\" rel=\"noopener noreferrer\">tohoto n\u00e1vodu &gt;&gt;<\/a><\/p>\n<h2>St\u00e1hnul jsem si do Locusu trasu z internetu. Pro\u010d mi u n\u00ed Locus nevykresl\u00ed v\u00fd\u0161kov\u00fd profil?<\/h2>\n<p>Ze stejn\u00e9ho d\u016fvodu jako v p\u0159edchoz\u00edm p\u0159\u00edpad\u011b &#8211; trasa le\u017e\u00ed na \u00fazem\u00ed, ve kter\u00e9m Locus nezn\u00e1 v\u00fd\u0161ku ter\u00e9nu. A v\u00fd\u0161ky z\u0159ejm\u011b nebyly sou\u010d\u00e1sn\u00ed importovan\u00e9ho souboru. St\u00e1hn\u011bte si pot\u0159ebn\u00e1 v\u00fd\u0161kov\u00e1 data podle <a href=\"https:\/\/docs.locusmap.eu\/doku.php?id=cz:manual:faq:how_to_add_map_shading\" target=\"_blank\" rel=\"noopener noreferrer\">tohoto n\u00e1vodu<\/a> &gt;&gt;<\/p>\n<h2>Zaznamenal jsem si v Locusu trasu v\u00fdletu. Exportoval jsem ji na webovou slu\u017ebu <a href=\"http:\/\/Bikemap.net\" target=\"_blank\" rel=\"noopener noreferrer\">Bikemap.net<\/a> (<a href=\"http:\/\/GPSies.com\" target=\"_blank\" rel=\"noopener noreferrer\">GPSies.com<\/a>, <a href=\"http:\/\/Cykloserver.cz\" target=\"_blank\" rel=\"noopener noreferrer\">Cykloserver.cz<\/a> atd.), ale ta uv\u00e1d\u00ed jin\u00e9 p\u0159ev\u00fd\u0161en\u00ed ne\u017e origin\u00e1ln\u00ed trasa, jak je to mo\u017en\u00e9?<\/h2>\n<p>Webov\u00e9 slu\u017eby zpravidla p\u0159i importu GPX souboru \u010dtou pouze zem\u011bpisn\u00e9 sou\u0159adnice trasov\u00fdch bod\u016f, kter\u00e9 n\u00e1sledn\u011b vykresl\u00ed nad vlastn\u00edm trojrozm\u011brn\u00fdm modelem ter\u00e9nu. Z n\u011bj pak vypo\u010d\u00edtaj\u00ed v\u00fdsledn\u00fd v\u00fd\u0161kov\u00fd profil. Ka\u017ed\u00fd takov\u00fd 3D model je ale zkreslen\u00fdm (zjednodu\u0161en\u00fdm) obrazem skute\u010dnosti, a tak se od p\u016fvodn\u00edho \u00fadaje mohou zna\u010dn\u011b li\u0161it.<\/p>\n<h2>\u00dadaje o p\u0159ev\u00fd\u0161en\u00ed b\u011bhem z\u00e1znamu trasy nab\u00fdvaj\u00ed v Locusu docela nere\u00e1ln\u00fdch hodnot. Po ukon\u010den\u00ed z\u00e1znamu a ulo\u017een\u00ed trasy je v\u0161ak v\u0161e v po\u0159\u00e1dku, pro\u010d?<\/h2>\n<p>B\u011bhem z\u00e1znamu trasy Locus na\u010d\u00edt\u00e1 ka\u017ed\u00fd centimetr p\u0159ev\u00fd\u0161en\u00ed mezi jednotliv\u00fdmi trasov\u00fdmi body, kter\u00e9 mohou b\u00fdt od sebe vzd\u00e1leny jen n\u011bkolik metr\u016f, a k tomu tak\u00e9 hrub\u00e1 v\u00fd\u0161kov\u00e1 data z GPS chipu, kter\u00e9 mohou obsahovat zna\u010dn\u00e9 odchylky. Kv\u016fli \u00faspo\u0159e energie jsou tato data optimalizov\u00e1na a\u017e po ukon\u010den\u00ed z\u00e1znamu a ulo\u017een\u00ed trasy.<\/p>\n<h2>\u00dadaje z vestav\u011bn\u00e9ho GPS v m\u00e9m telefonu mi nesta\u010d\u00ed, co m\u00e1m d\u011blat?<\/h2>\n<p>Locus um\u00ed p\u0159es bluetooth komunikovat i s extern\u00edmi GPS p\u0159ij\u00edma\u010di. Vyzkou\u0161ejte to.<\/p>\n<p>Ur\u010dit\u011b v\u00e1s napadaj\u00ed dal\u0161\u00ed t\u00e9mata a dotazy v t\u00e9to oblasti. Sd\u011blte n\u00e1m je na na\u0161em <a href=\"http:\/\/help.locusmap.eu\" target=\"_blank\" rel=\"noopener noreferrer\">helpdesku<\/a>, budeme se sna\u017eit na v\u0161echny odpov\u011bd\u011bt.<\/p><\/p>\n<div class=\"clearfix\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Nadmo\u0159sk\u00e1 v\u00fd\u0161ka, v\u00fd\u0161ka nad ter\u00e9nem, optimalizace m\u011b\u0159en\u00ed v\u00fd\u0161ky&#8230; ot\u00e1zek na tato t\u00e9mata je na na\u0161em&#8230;<\/p>\n","protected":false},"author":6,"featured_media":19570,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2590],"tags":[3258,3259,3260,3261],"class_list":["post-13380","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tech-cs","tag-altitude-cs-3","tag-altitude-offset-cs-3","tag-elevation-cs-3","tag-pressure-calibration-cs-3"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - 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