How to get WKID for own shape files.

[xariaD]

We wish to use our own shape file. how to get/provide the WKID for the file.

[dotMorten_esri]

As the message suggests, ask the dataprovider from where you got the data what the spatial reference of the data is. There's not really a good way to know if you don't have the metadata information.

[xariaD]

Okay!

I have another question regarding MapIt. Can we use our own maps as base maps and then load another shape file over those maps?

We don't want to use Bing maps or any other online maps. Should we use ArcGIS server instead of MapIT in that case?

[dotMorten_esri]

MapIt only serves out raw vector data, and not base data. So yes ArcGIS Server would be a great option for basemaps instead of Bing Maps (in fact that's what the API was designed for in the first place). You can even create your own layer types (see the codegallery for samples) so you can use any type of mapservice that can serve out map images via HTTP. For instance OpenStreetMap, WMS, etc.