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        <gco:CharacterString>V souladu s přílohou 2 Vyhlášky 106/2025 Sb., kterou se provádí některá ustanovení zákona o veřejné hydrometeorologické službě, ČHMÚ zpřístupnil verifikované a agregované údaje pro hodnoty koncentrací chemického složení srážek. Jedná se o chemické látky: úhrn srážek (RAIN), vodivost (cond), pH, arsen (As), vápenaté ionty (Ca²⁺), kadmium (Cd), chloridové ionty (Cl⁻), kobalt (Co), chrom (Cr), měď (Cu), fluoridové ionty (F⁻), železo (Fe), rtuť (Hg), draselné ionty (K⁺), hořečnaté ionty (Mg²⁺), mangan (Mn), sodné ionty (Na⁺), amonné ionty (NH₄⁺), nikl (Ni), dusičnanové ionty (NO₃⁻), olovo (Pb), celkový fosfor (P-sum), selen (Se), síranové ionty (SO₄²⁻), stroncium (Sr), vanad (V), zinek (Zn) a vybrané perzistentní organické látky: polycyklické aromatické uhlovodíky (POPs-PAH) a polychlorované bifenyly (POPs-PCB).

Data jsou k dispozici od roku 1976 a jsou vázána na lokalitu. Primární data jsou uvedena v intervalech odběru 1 den, 1 týden, 1 měsíc nebo nepravidelně, podle typu měření. Agregovaná data jsou vypočtena z výše uvedených primárních dat. Jedná se o tyto údaje: týdenní, měsíční a roční koncentrace a týdenní, měsíční a roční depozice. Poslední verifikovaná data pocházejí přibližně z období před 18 měsíci k aktuálnímu dni, což odpovídá procesu verifikace dat.</gco:CharacterString>
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            <gmd:LocalisedCharacterString locale="#locale-eng">In accordance with Annex 2 of Decree No. 106/2025 Coll., implementing certain provisions of the Act on the Public Hydrometeorological Service, CHMI has made available verified and aggregated data for concentrations of precipitation chemical composition. These include precipitation amount (RAIN), conductivity (cond), pH, arsenic (As), calcium ions (Ca²⁺), cadmium (Cd), chloride ions (Cl⁻), cobalt (Co), chromium (Cr), copper (Cu), fluoride ions (F⁻), iron (Fe), mercury (Hg), potassium ions (K⁺), magnesium ions (Mg²⁺), manganese (Mn), sodium ions (Na⁺), ammonium ions (NH₄⁺), nickel (Ni), nitrate ions (NO₃⁻), lead (Pb), total phosphorus (P-sum), selenium (Se), sulfate ions (SO₄²⁻), strontium (Sr), vanadium (V), zinc (Zn), and selected persistent organic pollutants: polycyclic aromatic hydrocarbons (POPs-PAH) and polychlorinated biphenyls (POPs-PCB).

The data are available from 1976 onwards and are site-specific. Primary data are provided in sampling intervals of 1 day, 1 week, 1 month, or irregularly, depending on the type of measurement. Aggregated data are calculated from the above-mentioned primary data. These include weekly, monthly, and annual concentrations, as well as weekly, monthly, and annual deposition.

The most recent verified data are approximately 18 months old relative to the current date, reflecting the data verification process.</gmd:LocalisedCharacterString>
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            </gmd:PT_FreeText>
          </gmd:keyword>
          <gmd:keyword xsi:type="gmd:PT_FreeText_PropertyType">
            <gco:CharacterString>Mn</gco:CharacterString>
            <gmd:PT_FreeText>
              <gmd:textGroup>
                <gmd:LocalisedCharacterString locale="#locale-eng">Mn</gmd:LocalisedCharacterString>
              </gmd:textGroup>
            </gmd:PT_FreeText>
          </gmd:keyword>
          <gmd:keyword xsi:type="gmd:PT_FreeText_PropertyType">
            <gco:CharacterString>Zn</gco:CharacterString>
            <gmd:PT_FreeText>
              <gmd:textGroup>
                <gmd:LocalisedCharacterString locale="#locale-eng">Zn</gmd:LocalisedCharacterString>
              </gmd:textGroup>
            </gmd:PT_FreeText>
          </gmd:keyword>
          <gmd:keyword xsi:type="gmd:PT_FreeText_PropertyType">
            <gco:CharacterString>Fe</gco:CharacterString>
            <gmd:PT_FreeText>
              <gmd:textGroup>
                <gmd:LocalisedCharacterString locale="#locale-eng">Fe</gmd:LocalisedCharacterString>
              </gmd:textGroup>
            </gmd:PT_FreeText>
          </gmd:keyword>
          <gmd:keyword xsi:type="gmd:PT_FreeText_PropertyType">
            <gco:CharacterString>Pb</gco:CharacterString>
            <gmd:PT_FreeText>
              <gmd:textGroup>
                <gmd:LocalisedCharacterString locale="#locale-eng">Pb</gmd:LocalisedCharacterString>
              </gmd:textGroup>
            </gmd:PT_FreeText>
          </gmd:keyword>
          <gmd:keyword xsi:type="gmd:PT_FreeText_PropertyType">
            <gco:CharacterString>Cd</gco:CharacterString>
            <gmd:PT_FreeText>
              <gmd:textGroup>
                <gmd:LocalisedCharacterString locale="#locale-eng">Cd</gmd:LocalisedCharacterString>
              </gmd:textGroup>
            </gmd:PT_FreeText>
          </gmd:keyword>
          <gmd:keyword xsi:type="gmd:PT_FreeText_PropertyType">
            <gco:CharacterString>Ni</gco:CharacterString>
            <gmd:PT_FreeText>
              <gmd:textGroup>
                <gmd:LocalisedCharacterString locale="#locale-eng">Ni</gmd:LocalisedCharacterString>
              </gmd:textGroup>
            </gmd:PT_FreeText>
          </gmd:keyword>
          <gmd:keyword xsi:type="gmd:PT_FreeText_PropertyType">
            <gco:CharacterString>F⁻</gco:CharacterString>
            <gmd:PT_FreeText>
              <gmd:textGroup>
                <gmd:LocalisedCharacterString locale="#locale-eng">F⁻</gmd:LocalisedCharacterString>
              </gmd:textGroup>
            </gmd:PT_FreeText>
          </gmd:keyword>
          <gmd:keyword xsi:type="gmd:PT_FreeText_PropertyType">
            <gco:CharacterString>Cl⁻</gco:CharacterString>
            <gmd:PT_FreeText>
              <gmd:textGroup>
                <gmd:LocalisedCharacterString locale="#locale-eng">Cl⁻</gmd:LocalisedCharacterString>
              </gmd:textGroup>
            </gmd:PT_FreeText>
          </gmd:keyword>
          <gmd:keyword xsi:type="gmd:PT_FreeText_PropertyType">
            <gco:CharacterString>NO₃⁻</gco:CharacterString>
            <gmd:PT_FreeText>
              <gmd:textGroup>
                <gmd:LocalisedCharacterString locale="#locale-eng">NO₃⁻</gmd:LocalisedCharacterString>
              </gmd:textGroup>
            </gmd:PT_FreeText>
          </gmd:keyword>
          <gmd:keyword xsi:type="gmd:PT_FreeText_PropertyType">
            <gco:CharacterString>SO₄²</gco:CharacterString>
            <gmd:PT_FreeText>
              <gmd:textGroup>
                <gmd:LocalisedCharacterString locale="#locale-eng">SO₄²</gmd:LocalisedCharacterString>
              </gmd:textGroup>
            </gmd:PT_FreeText>
          </gmd:keyword>
          <gmd:keyword xsi:type="gmd:PT_FreeText_PropertyType">
            <gco:CharacterString>ČHMÚ</gco:CharacterString>
            <gmd:PT_FreeText>
              <gmd:textGroup>
                <gmd:LocalisedCharacterString locale="#locale-eng">CHMI</gmd:LocalisedCharacterString>
              </gmd:textGroup>
            </gmd:PT_FreeText>
          </gmd:keyword>
          <gmd:keyword xsi:type="gmd:PT_FreeText_PropertyType">
            <gco:CharacterString>Český hydrometeorologický ústav</gco:CharacterString>
            <gmd:PT_FreeText>
              <gmd:textGroup>
                <gmd:LocalisedCharacterString locale="#locale-eng">Czech Hydrometeorological Institute</gmd:LocalisedCharacterString>
              </gmd:textGroup>
            </gmd:PT_FreeText>
          </gmd:keyword>
          <gmd:keyword xsi:type="gmd:PT_FreeText_PropertyType">
            <gco:CharacterString>verifikovaná data</gco:CharacterString>
            <gmd:PT_FreeText>
              <gmd:textGroup>
                <gmd:LocalisedCharacterString locale="#locale-eng">verified data</gmd:LocalisedCharacterString>
              </gmd:textGroup>
            </gmd:PT_FreeText>
          </gmd:keyword>
          <gmd:keyword xsi:type="gmd:PT_FreeText_PropertyType">
            <gco:CharacterString>historické údaje</gco:CharacterString>
            <gmd:PT_FreeText>
              <gmd:textGroup>
                <gmd:LocalisedCharacterString locale="#locale-eng">historical data</gmd:LocalisedCharacterString>
              </gmd:textGroup>
            </gmd:PT_FreeText>
          </gmd:keyword>
        </gmd:MD_Keywords>
      </gmd:descriptiveKeywords>
      <gmd:resourceConstraints>
        <gmd:MD_LegalConstraints>
          <gmd:useConstraints>
            <gmd:MD_RestrictionCode codeListValue="otherRestrictions" codeList="http://standards.iso.org/iso/19139/resources/gmxCodelists.xml#MD_RestrictionCode">otherRestrictions</gmd:MD_RestrictionCode>
          </gmd:useConstraints>
          <gmd:otherConstraints xsi:type="gmd:PT_FreeText_PropertyType">
            <gmx:Anchor xlink:href="https://creativecommons.org/licenses/by/4.0/">Creative Commons BY 4.0</gmx:Anchor>
            <gmd:PT_FreeText>
              <gmd:textGroup>
                <gmd:LocalisedCharacterString locale="#locale-eng">Creative Commons BY 4.0</gmd:LocalisedCharacterString>
              </gmd:textGroup>
            </gmd:PT_FreeText>
          </gmd:otherConstraints>
          <gmd:otherConstraints xsi:type="gmd:PT_FreeText_PropertyType">
            <gco:CharacterString>https://creativecommons.org/licenses/by/4.0/legalcode.cs</gco:CharacterString>
            <gmd:PT_FreeText>
              <gmd:textGroup>
                <gmd:LocalisedCharacterString locale="#locale-eng">https://creativecommons.org/licenses/by/4.0/legalcode.en</gmd:LocalisedCharacterString>
              </gmd:textGroup>
            </gmd:PT_FreeText>
          </gmd:otherConstraints>
        </gmd:MD_LegalConstraints>
      </gmd:resourceConstraints>
      <gmd:resourceConstraints>
        <gmd:MD_LegalConstraints>
          <gmd:accessConstraints>
            <gmd:MD_RestrictionCode codeListValue="otherRestrictions" codeList="http://standards.iso.org/iso/19139/resources/gmxCodelists.xml#MD_RestrictionCode">otherRestrictions</gmd:MD_RestrictionCode>
          </gmd:accessConstraints>
          <gmd:otherConstraints xsi:type="gmd:PT_FreeText_PropertyType">
            <gmx:Anchor xlink:href="http://inspire.ec.europa.eu/metadata-codelist/LimitationsOnPublicAccess/noLimitations">bez omezení veřejného přístupu</gmx:Anchor>
            <gmd:PT_FreeText>
              <gmd:textGroup>
                <gmd:LocalisedCharacterString locale="#locale-eng">no limitations to public access</gmd:LocalisedCharacterString>
              </gmd:textGroup>
            </gmd:PT_FreeText>
          </gmd:otherConstraints>
          <gmd:otherConstraints xsi:type="gmd:PT_FreeText_PropertyType">
            <gmx:Anchor xlink:href="http://opendata.gov.cz/definition/opendata">Otevřená data ČR</gmx:Anchor>
            <gmd:PT_FreeText>
              <gmd:textGroup>
                <gmd:LocalisedCharacterString locale="#locale-eng">Open Data of the Czech Republic</gmd:LocalisedCharacterString>
              </gmd:textGroup>
            </gmd:PT_FreeText>
          </gmd:otherConstraints>
        </gmd:MD_LegalConstraints>
      </gmd:resourceConstraints>
      <gmd:spatialRepresentationType>
        <gmd:MD_SpatialRepresentationTypeCode codeListValue="textTable" codeList="http://standards.iso.org/iso/19139/resources/gmxCodelists.xml#MD_SpatialRepresentationTypeCode">textTable</gmd:MD_SpatialRepresentationTypeCode>
      </gmd:spatialRepresentationType>
      <gmd:language>
        <gmd:LanguageCode codeList="http://www.loc.gov/standards/iso639-2/" codeListValue="cze">cze</gmd:LanguageCode>
      </gmd:language>
      <gmd:language>
        <gmd:LanguageCode codeList="http://www.loc.gov/standards/iso639-2/" codeListValue="eng">eng</gmd:LanguageCode>
      </gmd:language>
      <gmd:topicCategory>
        <gmd:MD_TopicCategoryCode>climatologyMeteorologyAtmosphere</gmd:MD_TopicCategoryCode>
      </gmd:topicCategory>
      <gmd:topicCategory>
        <gmd:MD_TopicCategoryCode>environment</gmd:MD_TopicCategoryCode>
      </gmd:topicCategory>
      <gmd:extent>
        <gmd:EX_Extent>
          <gmd:geographicElement>
            <gmd:EX_GeographicBoundingBox>
              <gmd:westBoundLongitude>
                <gco:Decimal>12.10</gco:Decimal>
              </gmd:westBoundLongitude>
              <gmd:eastBoundLongitude>
                <gco:Decimal>18.91</gco:Decimal>
              </gmd:eastBoundLongitude>
              <gmd:southBoundLatitude>
                <gco:Decimal>48.59</gco:Decimal>
              </gmd:southBoundLatitude>
              <gmd:northBoundLatitude>
                <gco:Decimal>51.04</gco:Decimal>
              </gmd:northBoundLatitude>
            </gmd:EX_GeographicBoundingBox>
          </gmd:geographicElement>
          <gmd:geographicElement>
            <gmd:EX_GeographicDescription>
              <gmd:geographicIdentifier>
                <gmd:RS_Identifier>
                  <gmd:code>
                    <gmx:Anchor xlink:href="http://publications.europa.eu/resource/authority/country/CZE">Česká republika</gmx:Anchor>
                  </gmd:code>
                </gmd:RS_Identifier>
              </gmd:geographicIdentifier>
            </gmd:EX_GeographicDescription>
          </gmd:geographicElement>
          <gmd:temporalElement>
            <gmd:EX_TemporalExtent>
              <gmd:extent>
                <gml:TimePeriod gml:id="TBE1">
                  <gml:beginPosition>1976-01-01</gml:beginPosition>
                  <gml:endPosition>2024-12-31</gml:endPosition>
                </gml:TimePeriod>
              </gmd:extent>
            </gmd:EX_TemporalExtent>
          </gmd:temporalElement>
        </gmd:EX_Extent>
      </gmd:extent>
    </gmd:MD_DataIdentification>
  </gmd:identificationInfo>
  <gmd:distributionInfo>
    <gmd:MD_Distribution>
      <gmd:distributionFormat>
        <gmd:MD_Format>
          <gmd:name>
            <gmx:Anchor xlink:href="http://www.iana.org/assignments/media-types/text/csv">CSV</gmx:Anchor>
          </gmd:name>
          <gmd:version>
            <gco:CharacterString>?</gco:CharacterString>
          </gmd:version>
        </gmd:MD_Format>
      </gmd:distributionFormat>
      <gmd:transferOptions>
        <gmd:MD_DigitalTransferOptions>
          <gmd:onLine>
            <gmd:CI_OnlineResource>
              <gmd:linkage>
                <gmd:URL>https://opendata.chmi.cz/air_quality/</gmd:URL>
              </gmd:linkage>
              <gmd:protocol>
                <gmx:Anchor xlink:href="https://services.cuzk.gov.cz/registry/codelist/OnlineResourceProtocolValue/WWW:LINK">WWW:LINK</gmx:Anchor>
              </gmd:protocol>
              <gmd:description>
                <gmx:Anchor xlink:href="http://www.iana.org/assignments/media-types/text/csv"/>
              </gmd:description>
              <gmd:function>
                <gmd:CI_OnLineFunctionCode codeListValue="download" codeList="http://standards.iso.org/iso/19139/resources/gmxCodelists.xml#CI_OnLineFunctionCode">download</gmd:CI_OnLineFunctionCode>
              </gmd:function>
            </gmd:CI_OnlineResource>
          </gmd:onLine>
        </gmd:MD_DigitalTransferOptions>
      </gmd:transferOptions>
    </gmd:MD_Distribution>
  </gmd:distributionInfo>
  <gmd:dataQualityInfo>
    <gmd:DQ_DataQuality>
      <gmd:scope>
        <gmd:DQ_Scope>
          <gmd:level>
            <gmd:MD_ScopeCode codeListValue="dataset" codeList="http://standards.iso.org/iso/19139/resources/gmxCodelists.xml#MD_ScopeCode"/>
          </gmd:level>
        </gmd:DQ_Scope>
      </gmd:scope>
      <gmd:report>
        <gmd:DQ_DomainConsistency>
          <gmd:result>
            <gmd:DQ_ConformanceResult>
              <gmd:specification>
                <gmd:CI_Citation>
                  <gmd:title xsi:type="gmd:PT_FreeText_PropertyType">
                    <gmx:Anchor xlink:href="https://data.europa.eu/eli/dir/2007/2">SMĚRNICE EVROPSKÉHO PARLAMENTU A RADY 2007/2/ES ze dne 14. března 2007 o zřízení Infrastruktury pro prostorové informace v Evropském společenství (INSPIRE)</gmx:Anchor>
                    <gmd:PT_FreeText>
                      <gmd:textGroup>
                        <gmd:LocalisedCharacterString locale="#locale-eng">DIRECTIVE 2007/2/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 14 March 2007 establishing an Infrastructure for Spatial Information in the European Community (INSPIRE)</gmd:LocalisedCharacterString>
                      </gmd:textGroup>
                    </gmd:PT_FreeText>
                  </gmd:title>
                  <gmd:date>
                    <gmd:CI_Date>
                      <gmd:date>
                        <gco:Date>2007-03-14</gco:Date>
                      </gmd:date>
                      <gmd:dateType>
                        <gmd:CI_DateTypeCode codeListValue="publication" codeList="http://standards.iso.org/iso/19115/resources/Codelists/cat/codelists.xml#CI_DateTypeCode"/>
                      </gmd:dateType>
                    </gmd:CI_Date>
                  </gmd:date>
                </gmd:CI_Citation>
              </gmd:specification>
              <gmd:explanation xsi:type="gmd:PT_FreeText_PropertyType">
                <gco:CharacterString>Viz odkazovanou specifikaci</gco:CharacterString>
                <gmd:PT_FreeText>
                  <gmd:textGroup>
                    <gmd:LocalisedCharacterString locale="#locale-eng">See referenced specification</gmd:LocalisedCharacterString>
                  </gmd:textGroup>
                </gmd:PT_FreeText>
              </gmd:explanation>
              <gmd:pass>
                <gco:Boolean>false</gco:Boolean>
              </gmd:pass>
            </gmd:DQ_ConformanceResult>
          </gmd:result>
        </gmd:DQ_DomainConsistency>
      </gmd:report>
      <gmd:report>
        <gmd:DQ_DomainConsistency>
          <gmd:result>
            <gmd:DQ_ConformanceResult>
              <gmd:specification>
                <gmd:CI_Citation>
                  <gmd:title xsi:type="gmd:PT_FreeText_PropertyType">
                    <gmx:Anchor xlink:href="https://ofn.gov.cz/základní-datové-typy/">OFN: Základní datové typy</gmx:Anchor>
                    <gmd:PT_FreeText>
                      <gmd:textGroup>
                        <gmd:LocalisedCharacterString locale="#locale-eng">OFN: Basic data types</gmd:LocalisedCharacterString>
                      </gmd:textGroup>
                    </gmd:PT_FreeText>
                  </gmd:title>
                  <gmd:date>
                    <gmd:CI_Date>
                      <gmd:date>
                        <gco:Date>2020-07-01</gco:Date>
                      </gmd:date>
                      <gmd:dateType>
                        <gmd:CI_DateTypeCode codeListValue="publication" codeList="http://standards.iso.org/iso/19115/resources/Codelists/cat/codelists.xml#CI_DateTypeCode"/>
                      </gmd:dateType>
                    </gmd:CI_Date>
                  </gmd:date>
                </gmd:CI_Citation>
              </gmd:specification>
              <gmd:explanation xsi:type="gmd:PT_FreeText_PropertyType">
                <gco:CharacterString>Viz odkazovanou specifikaci</gco:CharacterString>
                <gmd:PT_FreeText>
                  <gmd:textGroup>
                    <gmd:LocalisedCharacterString locale="#locale-eng">See referenced specification</gmd:LocalisedCharacterString>
                  </gmd:textGroup>
                </gmd:PT_FreeText>
              </gmd:explanation>
              <gmd:pass>
                <gco:Boolean>true</gco:Boolean>
              </gmd:pass>
            </gmd:DQ_ConformanceResult>
          </gmd:result>
        </gmd:DQ_DomainConsistency>
      </gmd:report>
      <gmd:lineage>
        <gmd:LI_Lineage>
          <gmd:statement xsi:type="gmd:PT_FreeText_PropertyType">
            <gco:CharacterString>Data od roku 1976.  Chemické složení srážek (koncentrace jednotlivých látek)  – verifikovaná primární data a agregované údaje.</gco:CharacterString>
            <gmd:PT_FreeText>
              <gmd:textGroup>
                <gmd:LocalisedCharacterString locale="#locale-eng">Chemical composition of precipitation (concentrations of individual compounds) – verified primary data and aggregated data.</gmd:LocalisedCharacterString>
              </gmd:textGroup>
            </gmd:PT_FreeText>
          </gmd:statement>
        </gmd:LI_Lineage>
      </gmd:lineage>
    </gmd:DQ_DataQuality>
  </gmd:dataQualityInfo>
</gmd:MD_Metadata>
