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                    <gco:CharacterString>INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of Geology</gco:CharacterString>
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                    <gco:CharacterString>Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services</gco:CharacterString>
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            <gco:CharacterString>The IGRF is a global model of the geomagnetic field. It allows spot values of the geomagnetic field vector to be calculated anywhere from the Earth's core out into space. The IGRF is generally revised every five years by a group of modellers associated with the International Association of Geomagnetism and Aeronomy (IAGA). See http://geomag.bgs.ac.uk/data_service/models_compass/igrf.html</gco:CharacterString>
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