# A Multilevel Digital Watermarking Protocol for Vector Geographic Data Based on Blockchain

> Research article (Journal of Geovisualization and Spatial Analysis, 2023) · cited 25× · AI/ML

**Wikidata**: [openalex:W4388575419](https://www.wikidata.org/wiki/openalex:W4388575419)  
**Source**: https://4ort.xyz/entity/a-multilevel-digital-watermarking-protocol-for-vector-geographic-data-based-on-blockchain