GeoPackage Preview

A VSCode extension for previewing GeoPackage (.gpkg) files.

It opens .gpkg files directly inside VSCode and provides a base map, layer list, attribute table, and feature interaction workflow.

Features

• Read-only preview for .gpkg files
• OpenStreetMap base map
• Lists vector tables and tile tables inside a GeoPackage
• Supports displaying multiple vector layers at the same time
• Supports reordering vector layers
• Supports layer visibility toggling
• Clicking a map feature syncs to the attribute table
• Clicking the attribute table syncs selection on the map
• Supports zooming to layers and features
• Supports collapsing the left sidebar and lower details pane
• Supports dragging to resize the left sidebar width and lower details pane height

Current Behavior

• Vector layers are previewable on the map
• Tile layers are listed as metadata only and are not rendered
• The attribute table shows all records for the currently active layer
• Map and attribute table selection stay synchronized

Known Limitations

• The current version is read-only and does not write back to GeoPackage files
• Large file protection is enabled; .gpkg files larger than 50 MB are rejected
• Some non-standard CRS values are best-effort only; unsupported layers are reported and skipped
• The attribute table does not use virtualization yet, so very large tables may affect performance

License

This project is licensed under the Apache License 2.0. See LICENSE.