GVZ Viewer

GVZ Viewer provides a domain-focused parser for GVZ geographic vector zone files, enabling rapid validation, inspection, and extraction of subsets for downstream analysis. It exposes layer structure, feature counts, and extents to guide data preparation. The tool is designed for GIS professionals who need to verify schema conformity and produce focused exports without launching full GIS suites. It conceptualizes GVZ data as an in-memory layer model with per-layer summaries and coordinate metadata, enabling fast quality checks and dataset slicing.
Users load a GVZ file, optionally select a CRS, filter layers, and define a geographic extent. The system computes per-layer feature counts, bounding boxes, and export-ready metadata, then generates outputs in GeoJSON or CSV. The approach emphasizes data integrity, standard-compliant CRS handling, and predictable export formats.
Unique value lies in in-browser GVZ parsing with strict schema validation, combined with lightweight data summaries and export paths that align with typical geospatial workflows. Use cases include data curation for urban planning analyses, environmental studies, and research projects that require quick GVZ data previews and ready-to-use subsets for GIS analyses. Core features include GVZ parsing, layer-level filtering, extent calculations, counts, and format exports, along with error handling for malformed files and unsupported CRSs.
This tool targets geospatial practitioners who need rapid GVZ validation and extraction, offering a focused, dependency-light alternative to full GIS software for routine GVZ data preparation and sharing.