When your property is entered into our system we document not only your address but the physical boundary of your property (especially important if you are not in a vertical asset).
We have written a custom engine from the ground-up specifically for this task. You can find open source projects that attempt to pull some data via simplified recursive bounding boxes - that will work for some amount of time but will not handle the intense volume that we see daily.
Due to the proprietary nature of our search methodology, we are not able to fully disclose every detail - if you have specific questions please feel free to reach out to us. More detailed information on how we score the listings that our engine finds is provided in the related article below.