Correlation of Spatial Data

Hi, I have 2 data sets X1 and X2. Both data sets contain various entries of geo spatial data (latitude and longitude).

X1=[lat1,lon1; lat2,lon2; lat3,lon3; ....] X2 is just like X1 but different values.

X1 and X2 are different in length.

Now I need to find the spatial correlation between these data sets to show that presence of entries of data set X1 means that entries of X2 will also be in nearby location. I am not looking for something like row by row matching as the data is independent of the row number and only dependent on location (latitude and longitude).
Can you guys help me with what sort of models and algorithms are used for such analysis.