I am using the basemap gallery sample. I need to add custom map services to that for now I have tried adding a map service but when I use the basemap gallery widget the map doesn�??t show. The issue is that the projection used by the custom map is SVY21. I understand that the basemap gallery can hold maps with same projection. But in my case I need to have maps from ESRI Online, Google Maps, OneMap,etc. This has different projections. Any ideas how to get this working?