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ArcGIS 10.3.1 has no transformation for GCS_Clarke_1880 to GCS_WGS_1984. Why is this the case, what have I missed?

Do we have to write a custom transformation?

There are a heap of Clarke transformation equations on stack. But I don't understand why.

GCS_Clarke_1880 WKID: 4034 Authority: EPSG

Angular Unit: Degree (0.0174532925199433) Prime Meridian: Greenwich (0.0) Datum: D_Clarke_1880 Spheroid: Clarke_1880 Semimajor Axis: 6378249.144808011 Semiminor Axis: 6356514.966204133 Inverse Flattening: 293.4663076556253

To

GCS_WGS_1984 WKID: 4326 Authority: EPSG

Angular Unit: Degree (0.0174532925199433) Prime Meridian: Greenwich (0.0) Datum: D_WGS_1984 Spheroid: WGS_1984 Semimajor Axis: 6378137.0 Semiminor Axis: 6356752.314245179 Inverse Flattening: 298.257223563

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  • OP please read. Related, if not a duplicate: gis.stackexchange.com/questions/88415/… – mkennedy Apr 22 '16 at 18:07
  • No, there aren't any Clarke 1880 transformations. There are heaps of GeoCRS (datum) transformations for GeoCRS that are based on Clarke 1880. What's the actual GeoCRS or datum for your data? What location does it represent? – mkennedy Apr 22 '16 at 18:08

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