EPSG:1093

Low Water

Attributes

Data source: OGP

Information source: Canadian Hydrographic Service

Revision date: 2017-07-14

Scope: Hydrography and Nautical Charting, mostly in harbour and river engineering.

Remarks: On a river it is a sloping surface. Users are advised to not use this generic vertical datum but to define explicit realizations of low water by specifying location and epoch, for instance "Low water at xxx during yyyy-yyyy".

Area of use: World.

SimpleMap

WGS84 bounds:
179.9 -85.0
-179.9 85.0

World.
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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:VerticalDatum</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;iogp-datum-1093&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:type&gt;</span>vertical<span class="nt">&lt;/epsg:type&gt;</span> <span class="nt">&lt;epsg:alias</span> <span class="na">alias=</span><span class="s">&quot;Low tide&quot;</span> <span class="na">code=</span><span class="s">&quot;25339&quot;</span> <span class="na">codeSpace=</span><span class="s">&quot;urn:ogc:def:naming-system:EPSG::7301&quot;</span> <span class="nt">/&gt;</span> <span class="nt">&lt;epsg:informationSource&gt;</span>Canadian Hydrographic Service<span class="nt">&lt;/epsg:informationSource&gt;</span> <span class="nt">&lt;epsg:revisionDate&gt;</span>2017-07-14<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::2011.047&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::2017.029&quot;</span> <span class="nt">/&gt;</span> <span class="nt">&lt;/epsg:changes&gt;</span> <span class="nt">&lt;epsg:show&gt;</span>true<span class="nt">&lt;/epsg:show&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;IOGP&quot;</span><span class="nt">&gt;</span>urn:ogc:def:datum:EPSG::1093<span class="nt">&lt;/gml:identifier&gt;</span> <span class="nt">&lt;gml:name&gt;</span>Low Water<span class="nt">&lt;/gml:name&gt;</span> <span class="nt">&lt;gml:remarks&gt;</span>On a river it is a sloping surface. Users are advised to not use this generic vertical datum but to define explicit realizations of low water by specifying location and epoch, for instance &quot;Low water at xxx during yyyy-yyyy&quot;.<span class="nt">&lt;/gml:remarks&gt;</span> <span class="nt">&lt;gml:domainOfValidity</span> <span class="na">xlink:href=</span><span class="s">&quot;urn:ogc:def:area:EPSG::1262&quot;</span> <span class="nt">/&gt;</span> <span class="nt">&lt;gml:scope&gt;</span>Hydrography and Nautical Charting, mostly in harbour and river engineering.<span class="nt">&lt;/gml:scope&gt;</span> <span class="nt">&lt;gml:anchorDefinition&gt;</span>The lowest level reached by the water surface in one tidal cycle. When used in inland (non-tidal) waters it is generally defined as a level which the daily mean water level would fall below less than 5% of the time.<span class="nt">&lt;/gml:anchorDefinition&gt;</span> <span class="nt">&lt;/gml:VerticalDatum&gt;</span> </pre></div>
<?xml version="1.0" encoding="UTF-8"?>
 <gml:VerticalDatum xmlns:epsg="urn:x-ogp:spec:schema-xsd:EPSG:1.0:dataset" xmlns:gml="http://www.opengis.net/gml/3.2" xmlns:xlink="http://www.w3.org/1999/xlink" gml:id="iogp-datum-1093">
  <gml:metaDataProperty>
    <epsg:CommonMetaData>
      <epsg:type>vertical</epsg:type>
      <epsg:alias alias="Low tide" code="25339" codeSpace="urn:ogc:def:naming-system:EPSG::7301" />
      <epsg:informationSource>Canadian Hydrographic Service</epsg:informationSource>
      <epsg:revisionDate>2017-07-14</epsg:revisionDate>
      <epsg:changes>
        <epsg:changeID xlink:href="urn:ogc:def:change-request:EPSG::2011.047" />
        <epsg:changeID xlink:href="urn:ogc:def:change-request:EPSG::2017.029" />
      </epsg:changes>
      <epsg:show>true</epsg:show>
      <epsg:isDeprecated>false</epsg:isDeprecated>
    </epsg:CommonMetaData>
  </gml:metaDataProperty>
  <gml:identifier codeSpace="IOGP">urn:ogc:def:datum:EPSG::1093</gml:identifier>
  <gml:name>Low Water</gml:name>
  <gml:remarks>On a river it is a sloping surface. Users are advised to not use this generic vertical datum but to define explicit realizations of low water by specifying location and epoch, for instance "Low water at xxx during yyyy-yyyy".</gml:remarks>
  <gml:domainOfValidity xlink:href="urn:ogc:def:area:EPSG::1262" />
  <gml:scope>Hydrography and Nautical Charting, mostly in harbour and river engineering.</gml:scope>
  <gml:anchorDefinition>The lowest level reached by the water surface in one tidal cycle. When used in inland (non-tidal) waters it is generally defined as a level which the daily mean water level would fall below less than 5% of the time.</gml:anchorDefinition>
</gml:VerticalDatum>