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In column types like Address, LatLong, XY we can add an Optional Url for KML File.
This can be used also for Image Overlay aka Ground Overlay.
In this example I use the AppSheet Logo to drop it over an Image.
This is not a Screen Overlay. Because this one has a fixed position on the image and will move when you move the image.
The good thing here: You can annotate on an image without editing the image. Because the logo is just a KML file.
At first here are some Documentations:
Image Overlay
KML Tutorial
KML Reference
Here is the KML code:
<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2" xmlns:gx="http://www.google.com/kml/ext/2.2" xmlns:kml="http://www.opengis.net/kml/2.2" xmlns:atom="http://www.w3.org/2005/Atom">
<GroundOverlay>
<name>ImageOverlay</name>
<color>00000000</color>
<Icon>
<href>https://www.appsheet.com/Content/img/logo/NewLogo/600px/Fullcolor%20-%20Blk%20Txt%20-%20Logomark%20Square.png</href>
<viewBoundScale>0.75</viewBoundScale>
</Icon>
<LatLonBox>
<north>-48</north>
<south>-25</south>
<east>-60</east>
<west>-90</west>
<rotation>45</rotation>
</LatLonBox>
</GroundOverlay>
</kml>
Thing I didnโt got to work in AppSheet:
<color> with transparency
<rotation>
Here is a demo video:
