@syncfusion/ej2-maps
The Maps component is used to visualize the geographical data and represent the statistical data of a particular geographical area on earth with user interactivity, and provides various customizing options
simplify-geojson
Apply Ramer-Douglas-Peucker line simplification to GeoJSON features or feature collections in JS or on the CLI
geojson-dissolve
Dissolve contiguous GeoJSON LineStrings and Polygons into single units.