added more bullets from https://wiki.geant.org/display/SYS/Mapping+use+cases

docs/source/planning.rst

@@ -128,3 +128,14 @@ Design/Edit concerns for subway map
       - should we have a validation step when designers return their modifications?
 
    - should we keep the design template completely outside of mapping provider?  or some metadata (e.g. lists of nodes/edges) in mapping provider?
+
+   - Discussion with Andrea:
+
+      - Andrea can produce svg's, with some unique id in the id attribute
+      - front end will update svg based on mapping-provider overlay data
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