Abstract: Aspects of the subject technology relate to a system configured to receive a set of network snapshot segments from an output stream of a stream processing service, compile the set of network snapshot segments from the set of messages into a first network snapshot and a second network snapshot, and compare the first network snapshot and the second network snapshot to identify a difference between the first network snapshot and the second network snapshot.

Abstract: Software application for a digital display device determines, in real time, whether structures/objects of real property comply with applicable ordinances and permits. Mobile device app determines the street address for the property being inspected. User of the mobile device captures visual media of internal or external structure/object on the property. App detects the object in the visual media using computer vision-based image recognition. App calls back-end computer system to look up in real time applicable ordinances for the structure/object and/or whether there is an appropriate permit(s) for the structure/object. App generates and displays on the mobile device augmented visual media that visually indicates whether the detected structure/object is compliant or not.