A method and system for dividing up large image files, for example, a subsurface wellbore log, into smaller files or slices for faster analysis and for faster transmission. The transmission and analysis can be performed over a network system for display to a user to perform data interpretation, such as geological interpretations. The side by side comparison can be individually controlled and analyzed as well as synchronized manually for comparison. The data from one or multiple different logs can be viewed side by side as smaller slices of the whole while being able to independently vary the view depth of the data from each wellbore by scrolling. Well tops, and other subsurface data, can be interpreted and shown in the well log image with associated depth registration.