I am a novice MapInfo user, with a basic to moderate knowledge of queries and SQL. My work entails doing risk assessments for shipping traffic based on AIS-tracks (radio-based vessel information system), which are represented as polylines in the dataset. However, some of the polylines are broken, due to missing AIS-coverage. I use several datasets, each of which have different places with broken tracks, and would like some way to quantify the deficiencies of each, as to make it easier to decide which dataset is best for a given location.
I am wondering is if it is possible to use MapInfo to calculate what percentage of polylines enter an area (in this case a 1X1 nautical mile box in a grid of Europe) but does not exit the box afterwards, and then give that box a given color based on the percentage.
Any ideas or input in regards to this would be greatly appreciated. If this question falls into the "RTFF", "RTFM" or similar, my apologies in advance.