adding how to fixed a network with a satellite background and the rel…

…ated issues, #2

docs/web/docs/FAQ.md

@@ -1045,6 +1045,17 @@ i.e. if simulations where run with the option `<statistic-output value="stats.xm
 The [osmWebWizard](Tutorials/OSMWebWizard.md) tool provides the simples solution to obtain a scenario with background images.
 Selecting the checkbox 'Satellite background' before generating the scenario is sufficient. To select another image provider, the tool [tileGet.py](Tools/Misc.md#tilegetpy) can also be used.
 
+It is important to know that the netowork projection will be changed from UTM to Mercator if you want to generate a sumo network with a satellite background. Accordingly, the length of most edges will be enlarged (almost doubled), although each node cooridnate remains unchanged. The respective network can be corrected by using the following way:
+- netconvert -s *.net.xml -p plain --proj.plain-geo
+- netconvert -e plain.edg.xml -n plain.nod.xml -x plain.con.xml -i plain.tll.xml --proj.utm
+
+The above "plain" can be specified by users.
+
+Once the network is corrected, it no longer matches
+- the respective satellite background,
+- the respective OSM background
+- the locations of the public transport stops extracted from the OSM. It is therefore necessary to recheck and correct the location information not only for stops but aslo for the corresponding access-lanes. If the locations of stops do not have to be precise, simply enter friendlyPos="true" in the respective line for each stop in the file. But then they are always at the end of the edge.
+
 ### sumo-gui breaks
 
   Sometimes [sumo-gui](sumo-gui.md) terminates with no reason.