EPSG:7004

Bessel 1841

Attributes

Unit: metre

Data source: OGP

Information source: US Army Map Service Technical Manual; 1943.

Revision date: 1999-04-22

Remarks: Original Bessel definition is a=3272077.14 and b=3261139.33 toise. This used a weighted mean of values from several authors but did not account for differences in the length of the various toise: the "Bessel toise" is therefore of uncertain length.

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Definition: OGP XML

<div class="syntax"><pre><span class="cp">&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;</span> <span class="nt">&lt;gml:Ellipsoid</span> <span class="na">xmlns:epsg=</span><span class="s">&quot;urn:x-ogp:spec:schema-xsd:EPSG:1.0:dataset&quot;</span> <span class="na">xmlns:gml=</span><span class="s">&quot;http://www.opengis.net/gml/3.2&quot;</span> <span class="na">xmlns:xlink=</span><span class="s">&quot;http://www.w3.org/1999/xlink&quot;</span> <span class="na">gml:id=</span><span class="s">&quot;epsg-ellipsoid-7004&quot;</span><span class="nt">&gt;</span> <span class="nt">&lt;gml:metaDataProperty&gt;</span> <span class="nt">&lt;epsg:CommonMetaData&gt;</span> <span class="nt">&lt;epsg:informationSource&gt;</span>US Army Map Service Technical Manual; 1943.<span class="nt">&lt;/epsg:informationSource&gt;</span> <span class="nt">&lt;epsg:revisionDate&gt;</span>1999-04-22<span class="nt">&lt;/epsg:revisionDate&gt;</span> <span class="nt">&lt;epsg:changes&gt;</span> <span class="nt">&lt;epsg:changeID</span> <span class="na">xlink:href=</span><span class="s">&quot;urn:ogc:def:change-request:EPSG::1998.321&quot;</span> <span class="nt">/&gt;</span> <span class="nt">&lt;epsg:changeID</span> <span class="na">xlink:href=</span><span class="s">&quot;urn:ogc:def:change-request:EPSG::1998.340&quot;</span> <span class="nt">/&gt;</span> <span class="nt">&lt;/epsg:changes&gt;</span> <span class="nt">&lt;epsg:isDeprecated&gt;</span>false<span class="nt">&lt;/epsg:isDeprecated&gt;</span> <span class="nt">&lt;/epsg:CommonMetaData&gt;</span> <span class="nt">&lt;/gml:metaDataProperty&gt;</span> <span class="nt">&lt;gml:identifier</span> <span class="na">codeSpace=</span><span class="s">&quot;OGP&quot;</span><span class="nt">&gt;</span>urn:ogc:def:ellipsoid:EPSG::7004<span class="nt">&lt;/gml:identifier&gt;</span> <span class="nt">&lt;gml:name&gt;</span>Bessel 1841<span class="nt">&lt;/gml:name&gt;</span> <span class="nt">&lt;gml:remarks&gt;</span>Original Bessel definition is a=3272077.14 and b=3261139.33 toise. This used a weighted mean of values from several authors but did not account for differences in the length of the various toise: the &quot;Bessel toise&quot; is therefore of uncertain length.<span class="nt">&lt;/gml:remarks&gt;</span> <span class="nt">&lt;gml:semiMajorAxis</span> <span class="na">uom=</span><span class="s">&quot;urn:ogc:def:uom:EPSG::9001&quot;</span><span class="nt">&gt;</span>6377397.155<span class="nt">&lt;/gml:semiMajorAxis&gt;</span> <span class="nt">&lt;gml:secondDefiningParameter&gt;</span> <span class="nt">&lt;gml:SecondDefiningParameter&gt;</span> <span class="nt">&lt;gml:inverseFlattening</span> <span class="na">uom=</span><span class="s">&quot;urn:ogc:def:uom:EPSG::9201&quot;</span><span class="nt">&gt;</span>299.1528128<span class="nt">&lt;/gml:inverseFlattening&gt;</span> <span class="nt">&lt;/gml:SecondDefiningParameter&gt;</span> <span class="nt">&lt;/gml:secondDefiningParameter&gt;</span> <span class="nt">&lt;/gml:Ellipsoid&gt;</span> </pre></div>
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   <gml:secondDefiningParameter>
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      </gml:SecondDefiningParameter>
   </gml:secondDefiningParameter>
</gml:Ellipsoid>