# Proof of Location Proof of Location is a technology that enables a device's physical location coordinates to be broadcast to the blockchain in a way that other devices can rely on the location data without having to trust the broadcasting device. Position-dependent applications include supply chain, parametric insurance, KYC/AML verification, or even consumer transactions. E.g, an online store might need to prove that an item has been delivered to you so that the smart contract can automatically trigger a payment from your wallet. Today’s geo-location tools are great for determining the location of a device, but cannot offer reliable and trusted location verification services. They are uni-directional and un-encrypted, which makes it problematic to rely on GPS for smart contracts that need to execute when spatial parameters are met. Dynamic Proof of Location empowers a permission-less and autonomous network of radio beacons that can offer secure location verification services through time synchronization in a decentralized manner. ### Challenges * Difficult to implements ## Used in * The [FOAM](https://www.foam.space/) Proof of Location protocol empowers a permission-less and autonomous network of radio beacons that can offer secure location services independent of external centralized sources such as GPS through time synchronization. The will deliver a hardware-based solution and have miners, Foam nodes provide geo-triangulation combined with a verified timestamp. * XY Findables sold more than 100K devices and [XYO]() plan to roll out a firmware upgrade to enable all the owners of these devices to become nodes/‘sentinels’ in a ‘Proof of Origin’ consensus. * [Platin](https://platin.io/) is using a Proof of Location protocol on their own blockchain, called the Plexus™, [Platin](https://platin.io/) makes it simple to verify a location claim. * [http://animist.io](http://animist.io/) is an open source Bluetooth server/beacon that lets Ethereum micro-computer clients proximity-detect mobile devices and write information about their location to a smart contract. ## Pros * Trustless: Byzantine fault tolerant clock synchronization * Independent: Does not rely on GPS * Open: Anyone can utilize the network or offer utility services * Accountable: Economics structured to ensure honest behavior, verified with fraud proofs * Incentivized: Service providers remunerated for extending localization and verification zones ## read more * [Using Blockchain for Peer-to-Peer Proof-of-Location (research whitepaper)](https://arxiv.org/pdf/1607.00174v2.pdf) * [FOAM blog](https://blog.foam.space/introduction-to-proof-of-location-6b4c77928022) * [FOAM](https://foam.space/) * [Medium Foam vs Platin (sponsored)](https://hackernoon.com/meet-platins-proof-of-location-a-secure-and-verifiable-location-consensus-protocol-336528626e7e) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://tokens-economy.gitbook.io/consensus/chain-based-proof-of-capacity-space/dynamic-proof-of-location.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.