vscode-leaflet

Leaflet Map 🗺️ for Notebook 📓 cell ⌗ data outputs

See Geo Data Viewer 🗺️ vscode extension for advanced Geo Data Analytics with kepler.gl

Leaflet Map 🗺️ Renderer

Leaflet Map 🗺️ Notebook 📓 cell ⌗ output renderer uses Leaflet 🌿 JavaScript library for interactive preview of Geo datasets loaded in VSCode Notebooks 📚

Features

• View Location data from CSV, XML, JSON, and GeoJSON Notebook 📓 cell ⌗ data output on the Leaflet 🌿 map 🗺️ with clustered markers, location information popups and hover tooltips
• View Point, LineString, MultiLineString, Polygon, and MultiPolygon GeoJSON features with interactive point, lines, regions, and properties info display on geometry hover and click
• REST Book 📓 TypeScript Notebook 📓 .NET Interactive Notebook 📓 and Pyolite 🐍 Notebook Examples 📚
• View JSON, CSV, and XML data without Geo Location information in JSON format in a scrollable text container with code pre-wrap for a quick copy/paste to other places:

Supported Data Formats

Leaflet 🌿 Map 🗺️ Notebook 📓 cell ⌗ data output Renderer supports loading Location data from the following output formats:

Data Mime Type	Location Data	Geo Location Processing Description
application/geo+json	Point, LineString, MultiLineString, Polygon, MultiPolygon	GeoJSON Location Point coordinates are displyaed as clustered markers using leaflet.markercluster JavaScript library with custom marker cluster icons and config. Lines and polygons are added to the map and displayed via Leaflet 🌿 GeoJSON Layer. See our leafletMap.js for more info about that setup.
application/json	Objects that contain geo location property pairs ending with: latitude/longitude, lat/lng, or lat/lng	Flat JSON data objects and arrays are processed by our custom GeoConverter to extract Location information and covert loaded dataset to GeoJSON for display on the map.
text/csv	CSV data with column names in the 1st header row and columns ending with: latitude/longitude, lat/lng, or lat/lng	CSV data is parsed with d3-dsv JavaScript library and converted to flat JSON data array and then to GeoJSON with our GeoConverter to display locations on the map.
application/xml or text/xml	XML data with root node children that contain attributes ending with: latitude/longitude, lat/lng, or lat/lng	XML data is parsed with fast-xml-parser to load it into JSON data objects array and then processed with our GeoConverter to display locations on the map. XML data support is very alpha and experimental at this point, and might be removed later.
application/ vnd.code.notebook.stdout or text/plain	Location data as string in CSV, XML, JSON or GeoJSON data format as described above	Text data typically comes from display and console.log() instructions in vscode notebooks. We try to parse text as JSON with JSON.parse(), as CSV with d3-dsv.csvParse(), and as XML with fast-xml-parser. If those parse methods fail, or provided notebook cell text output contains no location data we can extract, we display text output in a custom scrollable text container with code pre-wrap for a quick copy/paste to other places. Otherwise, loaded data is converted to GeoJSON with our GeoConverter for locations display on the map.

🗺️ Examples

Install and use Data Table 🈸 for Notebooks 📚 built-in Notebook 📓 Examples to view Leaflet Map 🗺️ with provided sample Geo datasets. You can access built-in Data Table 🈸 Notebook 📓 Examples via Data Table: Notebook Examples command from View -> Command Palette...

.NET Interactive Notebook Example

1. Install .NET Install Tool for Extension Authors vscode extension

2. Install .NET Interactive Notebooks 📚 vscode extension

3. Load USA Airports .NET Interactive Notebook 📓

4. Run All cells ⌗:

TypeScript Notebook Example

1. Install TypeScript Notebooks 📚 vscode extension

2. Download USA State Capitals GeoJSON data file

3. Load USA State Capitals TypeScript Notebook 📓

4. Run All cells ⌗ to view that GeoJSON data output in a Leaflet 🌿 Map 🗺️:

REST Book Example

1. Install REST Book 📓 vscode extension

2. Load World Cities REST Book 📓

3. Run All cells ⌗

4. Click on ... in the gutter of GET data output and change it to Leaflet Map 🗺️ renderer:

Also try World Countries REST Book 📓 example:

Or USA States REST Book 📓 example:

Pyolite Notebook Example

1. Install Pyolite 🐍 vscode extension

2. Load Chicago Red Light Cameras Pyolite Notebook 📓

3. Run Python code cell and click on ... -> Choose Output Mimetype -> text/plain Leaflet Map to view red light camera locations on the map 🗺️:

Recommended Extensions

Recommended extensions for working with Interactive Notebooks 📚 data 🈸 charts 📈 and geo 🗺️ data formats in VSCode:

Extension	Description
REST Book	Notebook extension for running REST queries
TypeScript Notebooks	TypeScript with Jupyter Notebooks 📚
.NET Interactive Notebooks	.NET Interactive Jupyter Notebooks 📚
Pyolite 🐍	Pyodide 🐍 kernel for JupyterLite Notebooks 📚
Observable JS	Observable JS compiler with Observable js and md code outline and previews.
JS Notebook 📓 Inspector 🕵️	Provides Interactive Preview of Observable JS Notebooks 📚, Notebook 📓 nodes ⎇ & cells ⌗ source code
Data Preivew 🈸	Data Preview 🈸 extension for importing 📤 viewing 🔎 slicing 🔪 dicing 🎲 charting 📊 & exporting 📥 large JSON array/config, YAML, Apache Arrow, Avro & Excel data files
Geo Data Viewer 🗺️	kepler.gl Geo Data Analytics tool to gen. some snazzy 🗺️s w/0 Py 🐍 pyWidgets ⚙️ pandas 🐼 or react ⚛️
Vega Viewer 📈	Provides Interactive Preview of Vega & Vega-Lite maps 🗺️ & graphs 📈
DeltaXML XPath Notebook 📓	XPath 3.1 Notebook for Visual Studio Code
GeoJSON Snippets	Create geospatial objects using GeoJSON snippets
Data Table 🈸	Data Table 🈸 for Notebook 📓 cell ⌗ data outputs

Dev Log

See #LeafletMapView 🗺️ tag on Twitter for the latest and greatest updates on this vscode extension and what's in store next.

Dev Build

$ git clone https://github.com/RandomFractals/vscode-leaflet
$ cd vscode-leaflet
$ npm install
$ npm run compile
$ code .

F5 to launch Leaflet Map 🗺️ extension vscode debug session.

||

vscode-leaflet>vsce package

to generate VSIX Leaflet Map 🗺️ extension package with vsce from our latest for local dev install in vscode.

Contributions

Any and all test, code or feedback contributions are welcome.

Open an issue or create a pull request to make this Leaflet Map 🗺️ vscode extension work better for all.

Backers