I have a matrix with a list of latitude and longitude coordinates (64,800×3). Each latitude and longitude pair have their own index number.

Ex.

`[Index Lat Lon; 10521 -45.5 50.5; 10522 -45.5 51.5; 10523 -45.5 52.5]`

I have another matrix with a list of latitude and longitude numbers, but no index numbers. Also, this matrix is not the same size as the previous matrix. (250×2; It has Lat and Lon only, no index number yet.)

I want to write a script that will examine the pairs of latitude and longitude coordinates for each matrix. When there is a pair that matches between the matrices, it would assign the same index number to the second matrix from the first matrix.

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