As update to this issue:
At the moment there is no functionality to work in meters within the mapping apps. I got round this problem by using the following calculation which anyone wanting to convert from meters to decimal degrees in the rijksdriehoekstel (Nederlands/dutch) format can use.
| eval x={your X in meters}, y={your Y in meters}
| where y > 0 AND x > 0
| eval dX = round((('x' - 155000) * 0.00001),5), dY = round((('y' - 463000) * 0.00001),5)
| eval SomN = (3235.65389 * dY) + (-32.58297 * pow(dX,2)) + (-0.2475 * pow(dY,2)) + (-0.84978 * pow(dX,2) * dY) + (-0.0655 * pow(dY,3)) + (-0.01709 * pow(dX,2) * pow(dY,2)) + (-0.00738 * dX) + (0.0053 * pow(dX,4)) + (-0.00039 * pow(dX,2) * pow(dY,3)) + (0.00033 * pow(dX,4) * dY) + (-0.00012 * dX * dY), SomE = (5260.52916 * dX) + (105.94684 * dX * dY) + (2.45656 * dX * pow(dY,2)) + (-0.81885 * pow(dX,3)) + (0.05594 * dX * pow(dY,3)) + (-0.05607 * pow(dX,3) * dY) + (0.01199 * dY) + (-0.00256 * pow(dX,3) * pow(dY,2)) + (0.00128 * dX * pow(dY,4)) + (0.00022 * pow(dY,2)) + (-0.00022 * pow(dX,2)) + (0.00026 * pow(dX,5))
| eval latitude = 52.15517 + (SomN / 3600), longitude = 5.387206 + (SomE / 3600)
The end result is a latitude and longitude field in decimal degrees that can be used in all the mapping apps.
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