EPSG:30492

Voirol 1875 / Sud Algerie (ancienne)

Covered area powered by MapTiler MapTiler logo

Center coordinates
534193.47 440419.83

Projected bounds:
-33384.48 169296.27
1068711.16 743685.83

WGS84 bounds:
-2.95 31.99
9.09 37.14

Available transformations:

  • Algeria - onshore north of 32°N. , accuracy 999.0 m, code 1294 (default) [3]

Selected transformation

Algeria - onshore north of 32°N.

code 1294

Accuracy 999.0 m (default)
3 parameters

Method: Geocentric translations (geog2D domain)

Remarks: Accuracy estimate not available.

Information source: U.S. Defense Mapping Agency TR8350.2 revision of August 1993.

Revision date: 2014-11-19

Attributes

Unit: metre

Geodetic CRS: Voirol 1875

Datum: Voirol 1875

Ellipsoid: Clarke 1880 (IGN)

Prime meridian: Greenwich

Data source: OGP

Revision date: 2004-01-07

Scope: Large and medium scale topographic mapping and engineering survey.

Remarks: Replaced by Nord Sahara 1959 / Voirol Unifie Sud (code 30792). The appropriate usage of CRSs using the Voirol 1875 and 1879 datums is lost in antiquity. They differ by about 9 metres. Oil industry references to one could in reality be to either.

Method: Geocentric translations (geog2D domain)

Area of use: Algeria - 35 grads to 38.5 grads North (31°30'N to 34°39'N).

Coordinate system: Cartesian 2D CS. Axes: easting, northing (X,Y). Orientations: east, north. UoM: m.

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Definition: Well Known Text (WKT)

PROJCS["Voirol 1875 / Sud Algerie (ancienne)",
    GEOGCS["Voirol 1875",
        DATUM["Voirol_1875",
            SPHEROID["Clarke 1880 (IGN)",6378249.2,293.4660212936265,
                AUTHORITY["EPSG","7011"]],
            TOWGS84[-73,-247,227,0,0,0,0],
            AUTHORITY["EPSG","6304"]],
        PRIMEM["Greenwich",0,
            AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,
            AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4304"]],
    PROJECTION["Lambert_Conformal_Conic_1SP"],
    PARAMETER["latitude_of_origin",33.3],
    PARAMETER["central_meridian",2.7],
    PARAMETER["scale_factor",0.999625769],
    PARAMETER["false_easting",500000],
    PARAMETER["false_northing",300000],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["X",EAST],
    AXIS["Y",NORTH],
    AUTHORITY["EPSG","30492"]]
PROJCS["Voirol 1875 / Sud Algerie (ancienne)",
    GEOGCS["Voirol 1875",
        DATUM["Voirol_1875",
            SPHEROID["Clarke 1880 (IGN)",6378249.2,293.4660212936265,
                AUTHORITY["EPSG","7011"]],
            TOWGS84[-73,-247,227,0,0,0,0],
            AUTHORITY["EPSG","6304"]],
        PRIMEM["Greenwich",0,
            AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,
            AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4304"]],
    PROJECTION["Lambert_Conformal_Conic_1SP"],
    PARAMETER["latitude_of_origin",33.3],
    PARAMETER["central_meridian",2.7],
    PARAMETER["scale_factor",0.999625769],
    PARAMETER["false_easting",500000],
    PARAMETER["false_northing",300000],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["X",EAST],
    AXIS["Y",NORTH],
    AUTHORITY["EPSG","30492"]]

Definition: ESRI WKT

PROJCS["Voirol_1875_Sud_Algerie_ancienne",GEOGCS["GCS_Voirol_1875_Degree",DATUM["D_Voirol_1875",SPHEROID["Clarke_1880_IGN",6378249.2,293.46602]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["latitude_of_origin",33.3],PARAMETER["central_meridian",2.7],PARAMETER["scale_factor",0.999625769],PARAMETER["false_easting",500000],PARAMETER["false_northing",300000],UNIT["Meter",1],PARAMETER["standard_parallel_1",33.3]]

Definition: PROJ.4

+proj=lcc +lat_1=33.3 +lat_0=33.3 +lon_0=2.7 +k_0=0.999625769 +x_0=500000 +y_0=300000 +a=6378249.2 +b=6356515 +towgs84=-73,-247,227,0,0,0,0 +units=m +no_defs 

Definition: JavaScript (Proj4js)

proj4.defs("EPSG:30492","+proj=lcc +lat_1=33.3 +lat_0=33.3 +lon_0=2.7 +k_0=0.999625769 +x_0=500000 +y_0=300000 +a=6378249.2 +b=6356515 +towgs84=-73,-247,227,0,0,0,0 +units=m +no_defs");

Definition: OGC GML

<?xml version="1.0" encoding="UTF-8"?>
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   <gml:metaDataProperty>
      <epsg:CommonMetaData>
         <epsg:type>projected</epsg:type>
         <epsg:alias alias="Voirol75 / S Algeria old" code="1110" codeSpace="urn:ogc:def:naming-system:EPSG::7302" />
         <epsg:revisionDate>2004-01-07</epsg:revisionDate>
         <epsg:changes>
            <epsg:changeID xlink:href="urn:ogc:def:change-request:EPSG::2003.361" />
         </epsg:changes>
         <epsg:show>true</epsg:show>
         <epsg:isDeprecated>false</epsg:isDeprecated>
      </epsg:CommonMetaData>
   </gml:metaDataProperty>
   <gml:identifier codeSpace="OGP">urn:ogc:def:crs:EPSG::30492</gml:identifier>
   <gml:name>Voirol 1875 / Sud Algerie (ancienne)</gml:name>
   <gml:remarks>Replaced by Nord Sahara 1959 / Voirol Unifie Sud (code 30792). The appropriate usage of CRSs using the Voirol 1875 and 1879 datums is lost in antiquity. They differ by about 9 metres. Oil industry references to one could in reality be to either.</gml:remarks>
   <gml:domainOfValidity xlink:href="urn:ogc:def:area:EPSG::1729" />
   <gml:scope>Large and medium scale topographic mapping and engineering survey.</gml:scope>
   <gml:conversion xlink:href="urn:ogc:def:coordinateOperation:EPSG::18012" />
   <gml:baseGeodeticCRS xlink:href="urn:ogc:def:crs:EPSG::4304" />
   <gml:cartesianCS xlink:href="urn:ogc:def:cs:EPSG::4499" />
</gml:ProjectedCRS>
<?xml version="1.0" encoding="UTF-8"?>
 <gml:ProjectedCRS 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="epsg-crs-30492">
   <gml:metaDataProperty>
      <epsg:CommonMetaData>
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         <epsg:revisionDate>2004-01-07</epsg:revisionDate>
         <epsg:changes>
            <epsg:changeID xlink:href="urn:ogc:def:change-request:EPSG::2003.361" />
         </epsg:changes>
         <epsg:show>true</epsg:show>
         <epsg:isDeprecated>false</epsg:isDeprecated>
      </epsg:CommonMetaData>
   </gml:metaDataProperty>
   <gml:identifier codeSpace="OGP">urn:ogc:def:crs:EPSG::30492</gml:identifier>
   <gml:name>Voirol 1875 / Sud Algerie (ancienne)</gml:name>
   <gml:remarks>Replaced by Nord Sahara 1959 / Voirol Unifie Sud (code 30792). The appropriate usage of CRSs using the Voirol 1875 and 1879 datums is lost in antiquity. They differ by about 9 metres. Oil industry references to one could in reality be to either.</gml:remarks>
   <gml:domainOfValidity xlink:href="urn:ogc:def:area:EPSG::1729" />
   <gml:scope>Large and medium scale topographic mapping and engineering survey.</gml:scope>
   <gml:conversion xlink:href="urn:ogc:def:coordinateOperation:EPSG::18012" />
   <gml:baseGeodeticCRS xlink:href="urn:ogc:def:crs:EPSG::4304" />
   <gml:cartesianCS xlink:href="urn:ogc:def:cs:EPSG::4499" />
</gml:ProjectedCRS>

Definition: XML

<?xml version="1.0" encoding="UTF-8"?>
 <gml:ProjectedCRS gml:id="ogrcrs305333" xmlns:gml="http://www.opengis.net/gml/3.2">
  <gml:srsName>Voirol 1875 / Sud Algerie (ancienne)</gml:srsName>
  <gml:srsID>
    <gml:name gml:codeSpace="urn:ogc:def:crs:EPSG::">30492</gml:name>
  </gml:srsID>
  <gml:baseCRS>
    <gml:GeographicCRS gml:id="ogrcrs305334">
      <gml:srsName>Voirol 1875</gml:srsName>
      <gml:srsID>
        <gml:name gml:codeSpace="urn:ogc:def:crs:EPSG::">4304</gml:name>
      </gml:srsID>
      <gml:usesEllipsoidalCS>
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          <gml:csID>
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          </gml:csID>
          <gml:usesAxis>
            <gml:CoordinateSystemAxis gml:id="ogrcrs305336" gml:uom="urn:ogc:def:uom:EPSG::9102">
              <gml:name>Geodetic latitude</gml:name>
              <gml:axisID>
                <gml:name gml:codeSpace="urn:ogc:def:axis:EPSG::">9901</gml:name>
              </gml:axisID>
              <gml:axisAbbrev>Lat</gml:axisAbbrev>
              <gml:axisDirection>north</gml:axisDirection>
            </gml:CoordinateSystemAxis>
          </gml:usesAxis>
          <gml:usesAxis>
            <gml:CoordinateSystemAxis gml:id="ogrcrs305337" gml:uom="urn:ogc:def:uom:EPSG::9102">
              <gml:name>Geodetic longitude</gml:name>
              <gml:axisID>
                <gml:name gml:codeSpace="urn:ogc:def:axis:EPSG::">9902</gml:name>
              </gml:axisID>
              <gml:axisAbbrev>Lon</gml:axisAbbrev>
              <gml:axisDirection>east</gml:axisDirection>
            </gml:CoordinateSystemAxis>
          </gml:usesAxis>
        </gml:EllipsoidalCS>
      </gml:usesEllipsoidalCS>
      <gml:usesGeodeticDatum>
        <gml:GeodeticDatum gml:id="ogrcrs305338">
          <gml:datumName>Voirol_1875</gml:datumName>
          <gml:datumID>
            <gml:name gml:codeSpace="urn:ogc:def:datum:EPSG::">6304</gml:name>
          </gml:datumID>
          <gml:usesPrimeMeridian>
            <gml:PrimeMeridian gml:id="ogrcrs305339">
              <gml:meridianName>Greenwich</gml:meridianName>
              <gml:meridianID>
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              </gml:meridianID>
              <gml:greenwichLongitude>
                <gml:angle gml:uom="urn:ogc:def:uom:EPSG::9102">0</gml:angle>
              </gml:greenwichLongitude>
            </gml:PrimeMeridian>
          </gml:usesPrimeMeridian>
          <gml:usesEllipsoid>
            <gml:Ellipsoid gml:id="ogrcrs305340">
              <gml:ellipsoidName>Clarke 1880 (IGN)</gml:ellipsoidName>
              <gml:ellipsoidID>
                <gml:name gml:codeSpace="urn:ogc:def:ellipsoid:EPSG::">7011</gml:name>
              </gml:ellipsoidID>
              <gml:semiMajorAxis gml:uom="urn:ogc:def:uom:EPSG::9001">6378249.2</gml:semiMajorAxis>
              <gml:secondDefiningParameter>
                <gml:inverseFlattening gml:uom="urn:ogc:def:uom:EPSG::9201">293.4660212936265</gml:inverseFlattening>
              </gml:secondDefiningParameter>
            </gml:Ellipsoid>
          </gml:usesEllipsoid>
        </gml:GeodeticDatum>
      </gml:usesGeodeticDatum>
    </gml:GeographicCRS>
  </gml:baseCRS>
  <gml:definedByConversion>
    <gml:Conversion gml:id="ogrcrs305341">
      <gml:usesMethod xlink:href="urn:ogc:def:method:EPSG::9801" />
      <gml:usesParameterValue>
        <gml:value gml:uom="urn:ogc:def:uom:EPSG::9102">33.3</gml:value>
        <gml:valueOfParameter xlink:href="urn:ogc:def:parameter:EPSG::8801" />
      </gml:usesParameterValue>
      <gml:usesParameterValue>
        <gml:value gml:uom="urn:ogc:def:uom:EPSG::9102">2.7</gml:value>
        <gml:valueOfParameter xlink:href="urn:ogc:def:parameter:EPSG::8802" />
      </gml:usesParameterValue>
      <gml:usesParameterValue>
        <gml:value gml:uom="urn:ogc:def:uom:EPSG::9001">0.999625769</gml:value>
        <gml:valueOfParameter xlink:href="urn:ogc:def:parameter:EPSG::8805" />
      </gml:usesParameterValue>
      <gml:usesParameterValue>
        <gml:value gml:uom="urn:ogc:def:uom:EPSG::9001">500000</gml:value>
        <gml:valueOfParameter xlink:href="urn:ogc:def:parameter:EPSG::8806" />
      </gml:usesParameterValue>
      <gml:usesParameterValue>
        <gml:value gml:uom="urn:ogc:def:uom:EPSG::9001">300000</gml:value>
        <gml:valueOfParameter xlink:href="urn:ogc:def:parameter:EPSG::8807" />
      </gml:usesParameterValue>
    </gml:Conversion>
  </gml:definedByConversion>
  <gml:usesCartesianCS>
    <gml:CartesianCS gml:id="ogrcrs305342">
      <gml:csName>Cartesian</gml:csName>
      <gml:csID>
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      </gml:csID>
      <gml:usesAxis>
        <gml:CoordinateSystemAxis gml:id="ogrcrs305343" gml:uom="urn:ogc:def:uom:EPSG::9001">
          <gml:name>Easting</gml:name>
          <gml:axisID>
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          </gml:axisID>
          <gml:axisAbbrev>E</gml:axisAbbrev>
          <gml:axisDirection>east</gml:axisDirection>
        </gml:CoordinateSystemAxis>
      </gml:usesAxis>
      <gml:usesAxis>
        <gml:CoordinateSystemAxis gml:id="ogrcrs305344" gml:uom="urn:ogc:def:uom:EPSG::9001">
          <gml:name>Northing</gml:name>
          <gml:axisID>
            <gml:name gml:codeSpace="urn:ogc:def:axis:EPSG::">9907</gml:name>
          </gml:axisID>
          <gml:axisAbbrev>N</gml:axisAbbrev>
          <gml:axisDirection>north</gml:axisDirection>
        </gml:CoordinateSystemAxis>
      </gml:usesAxis>
    </gml:CartesianCS>
  </gml:usesCartesianCS>
</gml:ProjectedCRS>
<?xml version="1.0" encoding="UTF-8"?>
 <gml:ProjectedCRS gml:id="ogrcrs305333" xmlns:gml="http://www.opengis.net/gml/3.2">
  <gml:srsName>Voirol 1875 / Sud Algerie (ancienne)</gml:srsName>
  <gml:srsID>
    <gml:name gml:codeSpace="urn:ogc:def:crs:EPSG::">30492</gml:name>
  </gml:srsID>
  <gml:baseCRS>
    <gml:GeographicCRS gml:id="ogrcrs305334">
      <gml:srsName>Voirol 1875</gml:srsName>
      <gml:srsID>
        <gml:name gml:codeSpace="urn:ogc:def:crs:EPSG::">4304</gml:name>
      </gml:srsID>
      <gml:usesEllipsoidalCS>
        <gml:EllipsoidalCS gml:id="ogrcrs305335">
          <gml:csName>ellipsoidal</gml:csName>
          <gml:csID>
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          <gml:usesAxis>
            <gml:CoordinateSystemAxis gml:id="ogrcrs305336" gml:uom="urn:ogc:def:uom:EPSG::9102">
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              <gml:axisID>
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              </gml:axisID>
              <gml:axisAbbrev>Lat</gml:axisAbbrev>
              <gml:axisDirection>north</gml:axisDirection>
            </gml:CoordinateSystemAxis>
          </gml:usesAxis>
          <gml:usesAxis>
            <gml:CoordinateSystemAxis gml:id="ogrcrs305337" gml:uom="urn:ogc:def:uom:EPSG::9102">
              <gml:name>Geodetic longitude</gml:name>
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              <gml:axisAbbrev>Lon</gml:axisAbbrev>
              <gml:axisDirection>east</gml:axisDirection>
            </gml:CoordinateSystemAxis>
          </gml:usesAxis>
        </gml:EllipsoidalCS>
      </gml:usesEllipsoidalCS>
      <gml:usesGeodeticDatum>
        <gml:GeodeticDatum gml:id="ogrcrs305338">
          <gml:datumName>Voirol_1875</gml:datumName>
          <gml:datumID>
            <gml:name gml:codeSpace="urn:ogc:def:datum:EPSG::">6304</gml:name>
          </gml:datumID>
          <gml:usesPrimeMeridian>
            <gml:PrimeMeridian gml:id="ogrcrs305339">
              <gml:meridianName>Greenwich</gml:meridianName>
              <gml:meridianID>
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              </gml:meridianID>
              <gml:greenwichLongitude>
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              </gml:greenwichLongitude>
            </gml:PrimeMeridian>
          </gml:usesPrimeMeridian>
          <gml:usesEllipsoid>
            <gml:Ellipsoid gml:id="ogrcrs305340">
              <gml:ellipsoidName>Clarke 1880 (IGN)</gml:ellipsoidName>
              <gml:ellipsoidID>
                <gml:name gml:codeSpace="urn:ogc:def:ellipsoid:EPSG::">7011</gml:name>
              </gml:ellipsoidID>
              <gml:semiMajorAxis gml:uom="urn:ogc:def:uom:EPSG::9001">6378249.2</gml:semiMajorAxis>
              <gml:secondDefiningParameter>
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            </gml:Ellipsoid>
          </gml:usesEllipsoid>
        </gml:GeodeticDatum>
      </gml:usesGeodeticDatum>
    </gml:GeographicCRS>
  </gml:baseCRS>
  <gml:definedByConversion>
    <gml:Conversion gml:id="ogrcrs305341">
      <gml:usesMethod xlink:href="urn:ogc:def:method:EPSG::9801" />
      <gml:usesParameterValue>
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        <gml:valueOfParameter xlink:href="urn:ogc:def:parameter:EPSG::8801" />
      </gml:usesParameterValue>
      <gml:usesParameterValue>
        <gml:value gml:uom="urn:ogc:def:uom:EPSG::9102">2.7</gml:value>
        <gml:valueOfParameter xlink:href="urn:ogc:def:parameter:EPSG::8802" />
      </gml:usesParameterValue>
      <gml:usesParameterValue>
        <gml:value gml:uom="urn:ogc:def:uom:EPSG::9001">0.999625769</gml:value>
        <gml:valueOfParameter xlink:href="urn:ogc:def:parameter:EPSG::8805" />
      </gml:usesParameterValue>
      <gml:usesParameterValue>
        <gml:value gml:uom="urn:ogc:def:uom:EPSG::9001">500000</gml:value>
        <gml:valueOfParameter xlink:href="urn:ogc:def:parameter:EPSG::8806" />
      </gml:usesParameterValue>
      <gml:usesParameterValue>
        <gml:value gml:uom="urn:ogc:def:uom:EPSG::9001">300000</gml:value>
        <gml:valueOfParameter xlink:href="urn:ogc:def:parameter:EPSG::8807" />
      </gml:usesParameterValue>
    </gml:Conversion>
  </gml:definedByConversion>
  <gml:usesCartesianCS>
    <gml:CartesianCS gml:id="ogrcrs305342">
      <gml:csName>Cartesian</gml:csName>
      <gml:csID>
        <gml:name gml:codeSpace="urn:ogc:def:cs:EPSG::">4400</gml:name>
      </gml:csID>
      <gml:usesAxis>
        <gml:CoordinateSystemAxis gml:id="ogrcrs305343" gml:uom="urn:ogc:def:uom:EPSG::9001">
          <gml:name>Easting</gml:name>
          <gml:axisID>
            <gml:name gml:codeSpace="urn:ogc:def:axis:EPSG::">9906</gml:name>
          </gml:axisID>
          <gml:axisAbbrev>E</gml:axisAbbrev>
          <gml:axisDirection>east</gml:axisDirection>
        </gml:CoordinateSystemAxis>
      </gml:usesAxis>
      <gml:usesAxis>
        <gml:CoordinateSystemAxis gml:id="ogrcrs305344" gml:uom="urn:ogc:def:uom:EPSG::9001">
          <gml:name>Northing</gml:name>
          <gml:axisID>
            <gml:name gml:codeSpace="urn:ogc:def:axis:EPSG::">9907</gml:name>
          </gml:axisID>
          <gml:axisAbbrev>N</gml:axisAbbrev>
          <gml:axisDirection>north</gml:axisDirection>
        </gml:CoordinateSystemAxis>
      </gml:usesAxis>
    </gml:CartesianCS>
  </gml:usesCartesianCS>
</gml:ProjectedCRS>

Definition: GeoServer

30492=PROJCS["Voirol 1875 / Sud Algerie (ancienne)",GEOGCS["Voirol 1875",DATUM["Voirol_1875",SPHEROID["Clarke 1880 (IGN)",6378249.2,293.4660212936265,AUTHORITY["EPSG","7011"]],TOWGS84[-73,-247,227,0,0,0,0],AUTHORITY["EPSG","6304"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4304"]],PROJECTION["Lambert_Conformal_Conic_1SP"],PARAMETER["latitude_of_origin",33.3],PARAMETER["central_meridian",2.7],PARAMETER["scale_factor",0.999625769],PARAMETER["false_easting",500000],PARAMETER["false_northing",300000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["X",EAST],AXIS["Y",NORTH],AUTHORITY["EPSG","30492"]]

Definition: MapServer - MAPfile

PROJECTION
	"proj=lcc"
	"lat_1=33.3"
	"lat_0=33.3"
	"lon_0=2.7"
	"k_0=0.999625769"
	"x_0=500000"
	"y_0=300000"
	"a=6378249.2"
	"b=6356515"
	"towgs84=-73,-247,227,0,0,0,0"
	"units=m"
	"no_defs"
END

Definition: MapServer - Python

wkt = '''PROJCS["Voirol 1875 / Sud Algerie (ancienne)",GEOGCS["Voirol 1875",DATUM["Voirol_1875",SPHEROID["Clarke 1880 (IGN)",6378249.2,293.4660212936265,AUTHORITY["EPSG","7011"]],TOWGS84[-73,-247,227,0,0,0,0],AUTHORITY["EPSG","6304"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4304"]],PROJECTION["Lambert_Conformal_Conic_1SP"],PARAMETER["latitude_of_origin",33.3],PARAMETER["central_meridian",2.7],PARAMETER["scale_factor",0.999625769],PARAMETER["false_easting",500000],PARAMETER["false_northing",300000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["X",EAST],AXIS["Y",NORTH],AUTHORITY["EPSG","30492"]]'''
m = mapObj('')
m.setWKTProjection(ref.ExportToWkt())
lyr = layerObj(m)
lyr.setWKTProjection(ref.ExportToWkt())

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=lcc +lat_1=33.3 +lat_0=33.3 +lon_0=2.7 +k_0=0.999625769 +x_0=500000 +y_0=300000 +a=6378249.2 +b=6356515 +towgs84=-73,-247,227,0,0,0,0 +units=m +no_defs">
	<Layer srs="+proj=lcc +lat_1=33.3 +lat_0=33.3 +lon_0=2.7 +k_0=0.999625769 +x_0=500000 +y_0=300000 +a=6378249.2 +b=6356515 +towgs84=-73,-247,227,0,0,0,0 +units=m +no_defs">
	</Layer>
</Map>

Definition: Mapnik - Python

proj4 = '+proj=lcc +lat_1=33.3 +lat_0=33.3 +lon_0=2.7 +k_0=0.999625769 +x_0=500000 +y_0=300000 +a=6378249.2 +b=6356515 +towgs84=-73,-247,227,0,0,0,0 +units=m +no_defs'
m = Map(256,256,proj4)
lyr = Layer('Name',proj4)

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 30492, 'EPSG', 30492, '+proj=lcc +lat_1=33.3 +lat_0=33.3 +lon_0=2.7 +k_0=0.999625769 +x_0=500000 +y_0=300000 +a=6378249.2 +b=6356515 +towgs84=-73,-247,227,0,0,0,0 +units=m +no_defs ', 'PROJCS["Voirol 1875 / Sud Algerie (ancienne)",GEOGCS["Voirol 1875",DATUM["Voirol_1875",SPHEROID["Clarke 1880 (IGN)",6378249.2,293.4660212936265,AUTHORITY["EPSG","7011"]],TOWGS84[-73,-247,227,0,0,0,0],AUTHORITY["EPSG","6304"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4304"]],PROJECTION["Lambert_Conformal_Conic_1SP"],PARAMETER["latitude_of_origin",33.3],PARAMETER["central_meridian",2.7],PARAMETER["scale_factor",0.999625769],PARAMETER["false_easting",500000],PARAMETER["false_northing",300000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["X",EAST],AXIS["Y",NORTH],AUTHORITY["EPSG","30492"]]');

Definition: OGC WKT

PROJCS["Voirol 1875 / Sud Algerie (ancienne)",GEOGCS["Voirol 1875",DATUM["Voirol_1875",SPHEROID["Clarke 1880 (IGN)",6378249.2,293.4660212936265,AUTHORITY["EPSG","7011"]],TOWGS84[-73,-247,227,0,0,0,0],AUTHORITY["EPSG","6304"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4304"]],PROJECTION["Lambert_Conformal_Conic_1SP"],PARAMETER["latitude_of_origin",33.3],PARAMETER["central_meridian",2.7],PARAMETER["scale_factor",0.999625769],PARAMETER["false_easting",500000],PARAMETER["false_northing",300000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["X",EAST],AXIS["Y",NORTH],AUTHORITY["EPSG","30492"]]

Definition: USGS

[0, 0, (6378249.2, 6356515.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0), -1]