Thanks for the suggestion Tim.
I saved as mapx, and opened in text editor. See below block.
There is alot of transformations in the code. I'm not sure why. However when I look at the list of transformations within the map properties, there is a very long list under the 'Additional transformations' stating that 'These transformations are currently not in use on the map'. See my attached screenshot. The weird thing is, the first one on that list, is exactly the one I'm trying to use apply to the map!!!
As for the list of transformations in the mapx file, the 'wkt' for the custom transformation is a very long piece of text. But also there isn't any 'wkid' number like there is for the other built-in transformations.
"datumTransforms" : [
{
"type" : "CIMDatumTransform",
"forward" : true,
"geoTransformation" : {
"geoTransforms" : [
{
"wkid" : 5339,
"latestWkid" : 5339,
"transformForward" : false,
"name" : "OSGB_1936_To_WGS_1984_7"
}
]
}
},
{
"type" : "CIMDatumTransform",
"forward" : false,
"geoTransformation" : {
"geoTransforms" : [
{
"wkid" : 5339,
"latestWkid" : 5339,
"transformForward" : false,
"name" : "OSGB_1936_To_WGS_1984_7"
}
]
}
},
{
"type" : "CIMDatumTransform",
"forward" : true,
"geoTransformation" : {
"geoTransforms" : [
{
"wkt" : "GEOGTRAN[\"TN15-ETRS89-to-TPEN11-IRF\",GEOGCS[\"GCS_ETRS_1989\",DATUM[\"D_ETRS_1989\",SPHEROID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],GEOGCS[\"GCS_TPEN11-IRF\",DATUM[\"D_TPEN11-IRF\",SPHEROID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],METHOD[\"NTv2\"],PARAMETER[\"Dataset_uk/TN15-ETRS89-to-TPEN11-IRF\",0.0]]",
"transformForward" : false,
"name" : "TN15-ETRS89-to-TPEN11-IRF"
},
{
"wkid" : 5338,
"latestWkid" : 5338,
"transformForward" : false,
"name" : "OSGB_1936_To_ETRS_1989_1"
}
]
}
},
{
"type" : "CIMDatumTransform",
"forward" : false,
"geoTransformation" : {
"geoTransforms" : [
{
"wkt" : "GEOGTRAN[\"TN15-ETRS89-to-TPEN11-IRF\",GEOGCS[\"GCS_ETRS_1989\",DATUM[\"D_ETRS_1989\",SPHEROID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],GEOGCS[\"GCS_TPEN11-IRF\",DATUM[\"D_TPEN11-IRF\",SPHEROID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],METHOD[\"NTv2\"],PARAMETER[\"Dataset_uk/TN15-ETRS89-to-TPEN11-IRF\",0.0]]",
"transformForward" : false,
"name" : "TN15-ETRS89-to-TPEN11-IRF"
},
{
"wkid" : 5338,
"latestWkid" : 5338,
"transformForward" : false,
"name" : "OSGB_1936_To_ETRS_1989_1"
}
]
}
},
{
"type" : "CIMDatumTransform",
"forward" : true,
"geoTransformation" : {
"geoTransforms" : [
{
"wkt" : "GEOGTRAN[\"TN15-ETRS89-to-TPEN11-IRF\",GEOGCS[\"GCS_ETRS_1989\",DATUM[\"D_ETRS_1989\",SPHEROID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],GEOGCS[\"GCS_TPEN11-IRF\",DATUM[\"D_TPEN11-IRF\",SPHEROID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],METHOD[\"NTv2\"],PARAMETER[\"Dataset_uk/TN15-ETRS89-to-TPEN11-IRF\",0.0]]",
"transformForward" : false,
"name" : "TN15-ETRS89-to-TPEN11-IRF"
},
{
"wkid" : 5338,
"latestWkid" : 5338,
"transformForward" : false,
"name" : "OSGB_1936_To_ETRS_1989_1"
}
]
}
},
{
"type" : "CIMDatumTransform",
"forward" : false,
"geoTransformation" : {
"geoTransforms" : [
{
"wkt" : "GEOGTRAN[\"TN15-ETRS89-to-TPEN11-IRF\",GEOGCS[\"GCS_ETRS_1989\",DATUM[\"D_ETRS_1989\",SPHEROID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],GEOGCS[\"GCS_TPEN11-IRF\",DATUM[\"D_TPEN11-IRF\",SPHEROID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],METHOD[\"NTv2\"],PARAMETER[\"Dataset_uk/TN15-ETRS89-to-TPEN11-IRF\",0.0]]",
"transformForward" : false,
"name" : "TN15-ETRS89-to-TPEN11-IRF"
},
{
"wkid" : 5338,
"latestWkid" : 5338,
"transformForward" : false,
"name" : "OSGB_1936_To_ETRS_1989_1"
}
]
}
},
{
"type" : "CIMDatumTransform",
"forward" : true,
"geoTransformation" : {
"geoTransforms" : [
{
"wkid" : 5338,
"latestWkid" : 5338,
"transformForward" : true,
"name" : "OSGB_1936_To_ETRS_1989_1"
},
{
"wkt" : "GEOGTRAN[\"TN15-ETRS89-to-TPEN11-IRF\",GEOGCS[\"GCS_ETRS_1989\",DATUM[\"D_ETRS_1989\",SPHEROID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],GEOGCS[\"GCS_TPEN11-IRF\",DATUM[\"D_TPEN11-IRF\",SPHEROID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],METHOD[\"NTv2\"],PARAMETER[\"Dataset_uk/TN15-ETRS89-to-TPEN11-IRF\",0.0]]",
"transformForward" : true,
"name" : "TN15-ETRS89-to-TPEN11-IRF"
}
]
}
},
{
"type" : "CIMDatumTransform",
"forward" : false,
"geoTransformation" : {
"geoTransforms" : [
{
"wkid" : 5338,
"latestWkid" : 5338,
"transformForward" : true,
"name" : "OSGB_1936_To_ETRS_1989_1"
},
{
"wkt" : "GEOGTRAN[\"TN15-ETRS89-to-TPEN11-IRF\",GEOGCS[\"GCS_ETRS_1989\",DATUM[\"D_ETRS_1989\",SPHEROID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],GEOGCS[\"GCS_TPEN11-IRF\",DATUM[\"D_TPEN11-IRF\",SPHEROID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],METHOD[\"NTv2\"],PARAMETER[\"Dataset_uk/TN15-ETRS89-to-TPEN11-IRF\",0.0]]",
"transformForward" : true,
"name" : "TN15-ETRS89-to-TPEN11-IRF"
}
]
}
},
{
"type" : "CIMDatumTransform",
"forward" : true,
"geoTransformation" : {
"geoTransforms" : [
{
"wkid" : 1149,
"latestWkid" : 1149,
"transformForward" : false,
"name" : "ETRS_1989_To_WGS_1984"
},
{
"wkt" : "GEOGTRAN[\"TN15-ETRS89-to-TPEN11-IRF\",GEOGCS[\"GCS_ETRS_1989\",DATUM[\"D_ETRS_1989\",SPHEROID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],GEOGCS[\"GCS_TPEN11-IRF\",DATUM[\"D_TPEN11-IRF\",SPHEROID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],METHOD[\"NTv2\"],PARAMETER[\"Dataset_uk/TN15-ETRS89-to-TPEN11-IRF\",0.0]]",
"transformForward" : true,
"name" : "TN15-ETRS89-to-TPEN11-IRF"
}
]
}
},
{
"type" : "CIMDatumTransform",
"forward" : false,
"geoTransformation" : {
"geoTransforms" : [
{
"wkid" : 1149,
"latestWkid" : 1149,
"transformForward" : false,
"name" : "ETRS_1989_To_WGS_1984"
},
{
"wkt" : "GEOGTRAN[\"TN15-ETRS89-to-TPEN11-IRF\",GEOGCS[\"GCS_ETRS_1989\",DATUM[\"D_ETRS_1989\",SPHEROID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],GEOGCS[\"GCS_TPEN11-IRF\",DATUM[\"D_TPEN11-IRF\",SPHEROID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],METHOD[\"NTv2\"],PARAMETER[\"Dataset_uk/TN15-ETRS89-to-TPEN11-IRF\",0.0]]",
"transformForward" : true,
"name" : "TN15-ETRS89-to-TPEN11-IRF"
}
]
}
},
{
"type" : "CIMDatumTransform",
"forward" : true,
"geoTransformation" : {
"geoTransforms" : [
{
"wkt" : "GEOGTRAN[\"TN15-ETRS89-to-TPEN11-IRF\",GEOGCS[\"GCS_ETRS_1989\",DATUM[\"D_ETRS_1989\",SPHEROID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],GEOGCS[\"GCS_TPEN11-IRF\",DATUM[\"D_TPEN11-IRF\",SPHEROID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],METHOD[\"NTv2\"],PARAMETER[\"Dataset_uk/TN15-ETRS89-to-TPEN11-IRF\",0.0]]",
"transformForward" : true,
"name" : "TN15-ETRS89-to-TPEN11-IRF"
}
]
}
},
{
"type" : "CIMDatumTransform",
"forward" : false,
"geoTransformation" : {
"geoTransforms" : [
{
"wkt" : "GEOGTRAN[\"TN15-ETRS89-to-TPEN11-IRF\",GEOGCS[\"GCS_ETRS_1989\",DATUM[\"D_ETRS_1989\",SPHEROID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],GEOGCS[\"GCS_TPEN11-IRF\",DATUM[\"D_TPEN11-IRF\",SPHEROID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],METHOD[\"NTv2\"],PARAMETER[\"Dataset_uk/TN15-ETRS89-to-TPEN11-IRF\",0.0]]",
"transformForward" : true,
"name" : "TN15-ETRS89-to-TPEN11-IRF"
}
]
}
},
{
"type" : "CIMDatumTransform",
"forward" : true,
"geoTransformation" : {
"geoTransforms" : [
{
"wkid" : 1149,
"latestWkid" : 1149,
"transformForward" : false,
"name" : "ETRS_1989_To_WGS_1984"
}
]
}
},
{
"type" : "CIMDatumTransform",
"forward" : false,
"geoTransformation" : {
"geoTransforms" : [
{
"wkid" : 1149,
"latestWkid" : 1149,
"transformForward" : false,
"name" : "ETRS_1989_To_WGS_1984"
}
]
}
},
{
"type" : "CIMDatumTransform",
"forward" : true,
"geoTransformation" : {
"geoTransforms" : [
{
"wkid" : 5339,
"latestWkid" : 5339,
"transformForward" : true,
"name" : "OSGB_1936_To_WGS_1984_7"
},
{
"wkid" : 1149,
"latestWkid" : 1149,
"transformForward" : false,
"name" : "ETRS_1989_To_WGS_1984"
}
]
}
},
{
"type" : "CIMDatumTransform",
"forward" : false,
"geoTransformation" : {
"geoTransforms" : [
{
"wkid" : 5339,
"latestWkid" : 5339,
"transformForward" : true,
"name" : "OSGB_1936_To_WGS_1984_7"
},
{
"wkid" : 1149,
"latestWkid" : 1149,
"transformForward" : false,
"name" : "ETRS_1989_To_WGS_1984"
}
]
}
}
],