Geodetic CRS: NAD27
Datum: North American Datum 1927
Ellipsoid: Clarke 1866
Prime meridian: Greenwich
Data source: OGP
Information source: National Geodetic Survey, www.ngs.noaa.gov
Revision date: 2019-09-17
Scope: Spatial referencing.
Remarks: Uses NADCON5 method which expects longitudes positive east in range 0-360°; source and target CRSs have longitudes positive east in range -180° to +180°. Accuracy at 67% confidence level is 0.5m onshore, 5m nearshore and undetermined farther offshore.
Method: NADCON5 (2D)
Area of use: United States (USA) - Alaska.
Description: nadcon5.nad27.nad83_1986.alaska.lat.trn.20160901.b
Definition: OGP XML
<?xml version="1.0" encoding="UTF-8"?> <gml:Transformation xmlns:epsg="urn:x-ogp:spec:schema-xsd:EPSG:1.0:dataset" xmlns:gco="http://www.isotc211.org/2005/gco" xmlns:gmd="http://www.isotc211.org/2005/gmd" xmlns:gml="http://www.opengis.net/gml/3.2" xmlns:xlink="http://www.w3.org/1999/xlink" gml:id="iogp-op-8549"> <gml:metaDataProperty> <epsg:CommonMetaData> <epsg:type>transformation</epsg:type> <epsg:alias alias="NAD27 to NAD83(1986)" code="7810" codeSpace="urn:ogc:def:naming-system:EPSG::7301" /> <epsg:alias alias="675" code="8986" codeSpace="urn:ogc:def:naming-system:EPSG::1046" /> <epsg:alias alias="NAD27 to NAD 83 (1986) [USA v2]" code="8987" codeSpace="urn:ogc:def:naming-system:EPSG::1047" /> <epsg:informationSource>National Geodetic Survey, www.ngs.noaa.gov</epsg:informationSource> <epsg:revisionDate>2019-09-17</epsg:revisionDate> <epsg:changes> <epsg:changeID xlink:href="urn:ogc:def:change-request:EPSG::2018.017" /> <epsg:changeID xlink:href="urn:ogc:def:change-request:EPSG::2019.035" /> </epsg:changes> <epsg:show>true</epsg:show> <epsg:isDeprecated>false</epsg:isDeprecated> </epsg:CommonMetaData> </gml:metaDataProperty> <gml:metaDataProperty> <epsg:CoordinateOperationMetaData> <epsg:variant>8</epsg:variant> </epsg:CoordinateOperationMetaData> </gml:metaDataProperty> <gml:identifier codeSpace="IOGP">urn:ogc:def:coordinateOperation:EPSG::8549</gml:identifier> <gml:name>NAD27 to NAD83 (8)</gml:name> <gml:remarks>Uses NADCON5 method which expects longitudes positive east in range 0-360°; source and target CRSs have longitudes positive east in range -180° to +180°. Accuracy at 67% confidence level is 0.5m onshore, 5m nearshore and undetermined farther offshore.</gml:remarks> <gml:domainOfValidity xlink:href="urn:ogc:def:area:EPSG::1330" /> <gml:scope>Spatial referencing.</gml:scope> <gml:operationVersion>NGS-Usa AK Nadcon5</gml:operationVersion> <gml:coordinateOperationAccuracy> <gmd:DQ_RelativeInternalPositionalAccuracy> <gmd:result> <gmd:DQ_QuantitativeResult> <gmd:valueUnit xlink:href="urn:ogc:def:uom:EPSG::9001" /> <gmd:value> <gco:Record> <gco:Decimal>0.5</gco:Decimal> </gco:Record> </gmd:value> </gmd:DQ_QuantitativeResult> </gmd:result> </gmd:DQ_RelativeInternalPositionalAccuracy> </gml:coordinateOperationAccuracy> <gml:sourceCRS xlink:href="urn:ogc:def:crs:EPSG::4267" /> <gml:targetCRS xlink:href="urn:ogc:def:crs:EPSG::4269" /> <gml:method xlink:href="urn:ogc:def:method:EPSG::1074" /> <gml:parameterValue> <gml:ParameterValue> <gml:valueFile>nadcon5.nad27.nad83_1986.alaska.lat.trn.20160901.b</gml:valueFile> <gml:operationParameter xlink:href="urn:ogc:def:parameter:EPSG::8657" /> </gml:ParameterValue> </gml:parameterValue> <gml:parameterValue> <gml:ParameterValue> <gml:valueFile>nadcon5.nad27.nad83_1986.alaska.lon.trn.20160901.b</gml:valueFile> <gml:operationParameter xlink:href="urn:ogc:def:parameter:EPSG::8658" /> </gml:ParameterValue> </gml:parameterValue> </gml:Transformation>