Using a local geotiff on a webmap?

[FriedaL]

I have a geotiff on my web server where the app is stored which I would like to integrate into a webmap as basemap. Is that possible without publishing the geotiff as a service?

[RobertScheitlin__GISP]

Frieda,

  There is the MapImageLayer that allows for adding a geoTiff to the map but I don't think you can set that as the basemap:

MapImageLayer | API Reference | ArcGIS API for JavaScript

So yes you will need to publish a service.