ParkPulse

ParkPulse.ai helps communities make smarter decisions about their green spaces. Cities grow, but we should not lose the parks and trees that keep us healthy. With ParkPulse, anyone can chat with an assistant to find nearby parks, see each park’s area, understand how many people rely on it, and view how changes could affect local green cover using NDVI. When a government or private entity propose park removal for development, the app shows a proposal page with clear, simple facts. Residents can review the impact and share their position by casting a vote. Votes use a Hedera wallet sign-in, so participation is secure and transparent. To encourage civic engagement, verified voters receive rewards directly to the same wallet they used to sign up. We also add checks to discourage duplicate accounts with light location-based verification. The goal is to help families and neighborhoods choose what is best for them and future generations.

Frontend: React for a clean, responsive web app and smooth chat experience. Data and maps: PostgreSQL with PostGIS to store park polygons and points, handle coordinates, run spatial queries like nearby searches and coverage overlap, and power the interactive map that shows park details. Blockchain and identity: Users sign in with a HashPack wallet. We use Hedera for consensus, so proposals and votes are tamper-evident. Smart contracts: Solidity contracts handle proposal creation, vote recording, and reward distribution. Chatbot: Built with LangChain agents that answer questions about nearby parks, park size, population impact, and NDVI signals. Consensus and tooling: The Hedera Agent Kit helps us publish and read proposals, vote on events, and manage a Hedera topic. Integrity and abuse prevention: One person per wallet, plus light location-based checks to reduce duplicate accounts and false voting. Data handling: The chatbot retrieves park attributes and NDVI metrics to explain how removing or altering a park could impact greenery and the surrounding community. Storage: The results of all the proposals of a Govt Entity are stored as blobs in walrus decentralized storage.