Helper apps on Databricks Apps
To install one of these apps: follow the steps in the docs and sync one of the below directories to your app diredtory.
In Databricks Free Edition, you can only set up one app at a time. In a paid workspace, you can have multiple.
pmtiles-viewer
https://github.com/danielsparing/databricks-geospatial-cookbook/tree/main/apps/pmtiles-viewer
This app is a viewer of PMTiles files stored in Volumes.
Uses App authorization.
For example, if you set up your app at https://pmtiles-viewer-{workspace_id}.aws.databricksapps.com/ and your PMTiles file is stored at the root of a Volume at /Volumes/{CATALOG}/{SCHEMA}/{VOLUME}/geometries.pmtiles, then your PMTiles viewer URL would be:
https://pmtiles-viewer-{workspace_id}.aws.databricksapps.com/?filePath=/Volumes/{CATALOG}/{SCHEMA}/{VOLUME}/geometries.pmtileshtml-viewer
https://github.com/danielsparing/databricks-geospatial-cookbook/tree/main/apps/html-viewer
This app uses user authorization (in Preview as of Aug 2025, and not yet available on Free Edition) to open a HTML file stored in Volumes.
An example use case is Lonboard generating a geospatial visualization into a HTML file, and then this app can be used to view this file without download – not that this is not that useful after all, as the data still has to travel to the user’s browser.