How to work with GeoJSON and TopoJSON in R?
For working with GeoJSON/TopoJSON data you have two options: either read it into sp objects; or use the addGeoJSON () and addTopoJSON () functions. The first approach is to use either rgdal or geojsonio (packages) to read GeoJSON/TopoJSON as sp objects. Then, you can use the full functionality of polygons, markers, colors, legends, etc.
Which is the best way to parse GeoJSON data?
The addGeoJSON () and addTopoJSON () functions accept GeoJSON data in either parsed (nested lists) or stringified (single-element character vector) format. Note that for larger JSON data, using parsed is significantly slower than using stringified, because parsed data must go through a JSON encoding step.
How can I change the style of GeoJSON?
You can modify the style of GeoJSON/TopoJSON features in a few ways. (Currently only paths and shapes can be styled; marker styling is not supported.) One way to apply styles to all of the features is to use the arguments directly on the addGeoJSON / addTopoJSON functions.
Which is better addgeojson or add TopoJSON?
This approach is preferred over using addGeoJSON / addTopoJSON, as it makes it easy to use feature properties in determining map colors, labels, etc., or to modify or add new properties.
For working with GeoJSON/TopoJSON data you have two options: either read it into sp objects; or use the addGeoJSON () and addTopoJSON () functions. The first approach is to use either geojsonio or rgdal (packages) to read GeoJSON/TopoJSON as sp objects. Then, you can use the full functionality of polygons, markers, colors, legends, etc.
How to create a leaflet for a JSON object?
See Leaflet’s path options for available style properties. The previous example demonstrated the style arguments. Below is a more involved example that sets both global styles and per-feature styles directly into the JSON object.
Is there a way to render a GeoJSON file?
If you’re having trouble rendering GeoJSON files, ensure you have a valid GeoJSON file by running it through the package geojsonlint, which has a variety of different GeoJSON linters.