Nisarga Adhikary is a software engineer and cybersecurity researcher known online as ni5arga. His work includes Sightline, an open-source search interface for exploring real-world infrastructure recorded in OpenStreetMap.[1][5]
Start with Sightline →
Links
Website CV
GitHub 
X LinkedIn Security, Threat Intelligence & OSINT Engineer · C3iHub, IIT Kanpur
Career
Adhikary’s CV lists security, threat-intelligence and open-source-intelligence engineering at C3iHub, IIT Kanpur, from June 2026. Earlier work includes a Wavelength software-engineering internship in March–May 2026, a Cypherock internship in August–September 2025, software engineering at Skann in September–December 2024 and web-development work for New Delhi Space Society in June–August 2023. His projects connect application security, reconnaissance and public-data analysis.[4]
Contributions
Sightline parses a natural-language or structured infrastructure query, resolves the location through Nominatim and builds a read-only Overpass query against OpenStreetMap. A map and result list display the returned assets, with a cache reducing repeat requests. This makes geographic data searchable by asset type, operator or region. Coverage and accuracy depend on the underlying community-maintained map; a missing result does not establish that an asset is absent.[5]
Tools, writing & talks
Tools
Start here
Sightlinegithub.comA geospatial search tool for infrastructure represented in OpenStreetMap.
Read the README’s architecture and query examples before using the linked map. No account is needed for the public interface; self-hosting assumes web-development familiarity and access to the documented mapping services.
Developer and repository owner[5]Original source