Draw Modify Trace Snap

--- layout: example.html title: Draw, modify, trace and snap shortdesc: Using the draw, modify, and snap interactions to edit existing geometries with tracing enabled. docs: > The Draw and Modify interactions have a trace option to enable tracing around existing features. This example uses the traceSource option to trace features from one source and add them to another source. When drawing, the first click on an edge of the target feature will start tracing. The second click on the edge will stop tracing. When modifying, dragging a vertex onto an edge of the target feature will activate tracing for the next drag. Now when an adjacent vertex is dragged onto the edge, the segment between the two vertices will be traced along the target feature. If a different vertex is dragged, no tracing will occur. tags: "draw, modify, trace, vector, snap, topology" cloak: - key: get_your_own_D6rA4zTHduk6KOKTXzGB value: Get your own API key at https://www.maptiler.com/cloud/ ---

Draw geometry mode PolygonLineStringModify only