OpenLayers

Powerful open-source web GIS mapping library for complex interactive maps and spatial data display.

Details

OpenLayers is a powerful open-source web mapping library supporting many map services, vector layers, projections, interactions and spatial data display. It suits building more complex WebGIS applications, map platforms and research spatial data pages.

Use cases: WebGIS, interactive maps, spatial data display, map services, research platform development

Note: OpenLayers is more powerful but has a steeper learning curve than Leaflet.