Coordinate System and Datum Additions for MapInfo Pro 10.0.1 - MapInfo_Pro - 2023

Coordinate System Transformation Improvements for the UK

This release significantly improves the accuracy of the coordinate system conversion between WGS 84 (and EUREF89) based coordinate systems and British National Grid. This improvement is achieved by using the NTv2 datum conversion algorithm between OSGB36 and WGS 84(and EUREF89) datum.

If you need to disable this NTv2 datum conversion, open the ntv2.xml file in the MapInfo application folder and make the following entries "false".

<NTv2Conversion>
      <Description>NTv2 Conversion for UK</Description>
      <GridFile>england-wales.gsb</GridFile>
      <Enabled>true</Enabled>
      <SourceDatum>
        <DatumID>79</DatumID>
      </SourceDatum>
      <DestinationDatum>
        <DatumID>104</DatumID>
      </DestinationDatum>
</NTv2Conversion>
<NTv2Conversion>
      <Description>NTv2 Conversion for UK</Description>
      <GridFile>scotland.gsb</GridFile>
      <Enabled>true</Enabled>
      <SourceDatum>
        <DatumID>79</DatumID>
      </SourceDatum>
      <DestinationDatum>
        <DatumID>104</DatumID>
      </DestinationDatum>
</NTv2Conversion>
<NTv2Conversion>
      <Description>NTv2 Conversion for UK</Description>
      <GridFile>england-wales.gsb</GridFile>
      <Enabled>true</Enabled>
      <SourceDatum>
        <DatumID>79</DatumID>
      </SourceDatum>
      <DestinationDatum>
        <DatumID>115</DatumID>
      </DestinationDatum>
</NTv2Conversion>
<NTv2Conversion>
      <Description>NTv2 Conversion for UK</Description>
      <GridFile>scotland.gsb</GridFile>
      <Enabled>true</Enabled>
      <SourceDatum>
        <DatumID>79</DatumID>
      </SourceDatum>
      <DestinationDatum>
        <DatumID>115</DatumID>
      </DestinationDatum>
</NTv2Conversion>