I have a case where I have vector data (crop census polygons) in a LO19_South Africa Projected Coordinate System with a Geographic Coordinate Sytem of Hartebeesthoek_1994. I then added MODIS LST data to my dataframe which has a Projected Coordinate System which reads: Unknown_datum_based_upon_the_custom_spheroid_Sinusoidal (in layer properties) and GCS Unknown_datum_based_upon_the_custom_spheroid (according to the layer properties) with datum: Not_specified_based_on_custom_spheroid (according to layer properties).
When the data frame CS is the same as the MODIS data then the MODIS data displays correctly. When I change the data frame CS to the crop census polygon CS then the MODIS data displays skew and the polygons correct. With the data frame with the MODIS data CS, I then created a Grid Index with the same coordinates system as the MODIS data so that it fits perfectly.
However I want to do area calculations using the Grid that I created with a MODIS/Sinusoidal Projection and the crop census data which has a LO19 projection.
I assume that both shapefiles need to be in the same coordinate system for the calculations to be accurate. Now my question now is how do I get the Grid(Sinusoidal Projection) into a LO19 Projection or visa versa.
I have tried the projection tool but it doesn't seem to work due to transformation issues.
Can anyone please assist me with this problem? Any advice would be much appreciated.