When performing a map overlay what must be georegistered in order for the result

Question

When performing a map overlay what must be georegistered in order for the resulting data layer to be of significance for a project? Data layers must be referenced to the same coordinate system, the same map projection, and the same datum (based on the same reference ellipsoid). Data layers can be either raster or polygon. They do not need to be referenced to the same coordinate system. Data layers only need to be referenced in the same projection. No other considerations are important. for polygon overlays.

Explanation / Answer

1st question:

Data layers must be referenced to the same co-ordinate system , the same map projection, and the same datum(based on the same reference ellipsoid)

Explanation: If the map overlay data is not georeferenced, the information extracted from such map overlay will give incorrect information spatially.

Question 2:

Both A & B are correct.

Explanation is given in both the options.

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