Hi Teo:
IIUC, since your OP above is posted within this ADE sub-forum, and specifically indicates your goal in this thread is to "get a background image as a reference", AFAIK, if using the Google Maps aerial imagery tile server via Sketchup, you would also need to:
* Sketchup Menu > File > Export > 2D Graphic ...of the aerial imagery texture draped onto the "flat" Sketchup "ground"
...
or:
* Assign a "Default Image Editor" in Sketchup via:
Sketchup Menu > Window > Preferences > {System Preferences} dialog > Applications >
Default Image Editor [Choose...] button
( Choose the executable file name for your preferred graphics application from the folder in which it is located )
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...
Next:
1.) Sketchup Menu > Window > Layers / Default Tray > {Layers} dialog >
Un-check "Location Terrain"
2.) Sketchup Menu > Window > Layers / Default Tray > {Layers} dialog >
check "Location Snapshot"
...
Then, using a copy of the Sketchup *SKP file containing all required 'draped' aerial imagery ground tiles:
1.) Pre-select all Google Maps aerial imagery draped onto Sketchup "ground" tiles
a.) Right-click the Pre-selected Google "ground" tiles
b.) Choose '
Unlock' from the pop-up context menu
2.) Double-click to 'Select' the entire area ...of the aerial imagery texture draped onto the "flat" Sketchup "ground surface"
3.) Right-click and choose Texture >
Edit Texture Image... from the pop-up context menu
4.) In the graphical editor application that pops up:
a.) Save / export a
copy of the image as a JPG or BMP etc., dividing it into multiple 'segments' of the airport area which are "small enough" (by file size), to be accepted into the (memory-limited) ADE background image work-space.
PS: Sketchup Geo-located aerial imagery uses (1) set of central Geo-referencing coordinates (for the very first tile of downloaded aerial imagery); these can be accessed / copied from:
Sketchup Menu > Window > {Model Info} dialog > Geo-location > [Set Manual Location...] button
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Hope this helps with 'extracting' Sketchup's Google Maps aerial imagery for use as a background in ADE !
GaryGB