watergems , bing map coordinate system, elevation,scada informations

axilleas papadom said:

1)How can i change bing map coordinate system (i have watergems update2 and i want coordinates for Greece)?
Also what coordinate system use bing maps (for example mine is, x: 784.889.467,23cm y:-25.225.428,25cm,is it okay for greece?)

As seen in the main Bing Maps wiki article, Bing Maps uses web mercator projections. You can align your model to a location in Greece using the "3 control points" option. With this, you pick a point in the model network and then a corresponding point on the map (in Greece) to align them. Doing this with three points enables you to align and rotate as well. See the above article for more on how to do this.

axilleas papadom said:

2)Can i add elevation from bing maps using my own key, or with another way?

The Bing Maps feature is only for background imaginary; it does not provide elevation contour data. The Terrain Extractor (Trex) feature can automatically assign elevations to model node elements based on a terrain model. You may be able to obtain publicly available terrain contour data. See more on Trex here: Using Terrain Extractor (Trex)

axilleas papadom said:

3)If i import scada data (for tank and pumps) can i skip demands or something else to run the project? In addition can i add demands automatically from scada?

This is known as demand inversing. Currently, to assign demands you can use LoadBuilder. This can take spatial data (for example points or polygons, or a projection) and allocate demands automatically. The "Flow monitoring distribution" method (see above article) may be of interest.

thanks a lot! 
You are very helpful!