Dashboard GeoJSON To Map

Category: Mega-Polis → Visualisation → Visualisation Data Tools
Node ID: SvMegapolisDashboardGeojsonToMap
Tooltip: Dashboard Geojson to Map
Dependencies: json

Functionality

Generates a Python code snippet (string) that adds a GeoJSON layer to an existing dashboard map object.

The node: 1. Reads a Map Name (string variable name that represents a map object in your dashboard code). 2. Reads a GeoJson input (GeoJSON serialized as a JSON string). 3. Parses the GeoJSON using json.loads(...). 4. Outputs a snippet in the form:

<map_name>.add_geojson(<geojson_object>)

This node does not render a map inside Blender/Sverchok. It outputs code intended to be executed in your dashboard runtime (e.g., Streamlit/Folium/other map wrapper that exposes .add_geojson(...)).

Inputs

Socket Type Description
Map Name SvStringsSocket Name of the map variable in your dashboard code (e.g., m, my_map). Must be linked.
GeoJson SvStringsSocket GeoJSON content as a JSON string (FeatureCollection / Feature / Geometry). Must be linked.

Parameters

This node has no exposed UI parameters.

Outputs

Socket Type Description
Dashboard GeoJson SvStringsSocket A Python code string that calls <map_name>.add_geojson(<geojson_object>).

Example

Add a buildings GeoJSON layer to a dashboard map

  1. Create a dashboard map object upstream and store it in a variable (for example, m).
  2. Connect:
    • Map Name → "m"
    • GeoJson → a valid GeoJSON string (e.g., a FeatureCollection)
  3. The output will be a snippet like:
m.add_geojson({"type":"FeatureCollection","features":[ ... ]})

Paste/execute the snippet inside the same dashboard environment where m exists.

Notes / gotchas

  • The node uses json.loads(geojson_in). This expects GeoJson to be a valid JSON string. If your upstream node already provides a Python dict/object instead of a JSON string, json.loads(...) will fail.
  • The output assumes your map object has an .add_geojson(...) method. Ensure your dashboard map wrapper supports this API.