Bill,

The bounds will only give you the corners of the image if you are facing 
exactly North, south, east, or west,

I am sorry I have not had a chance to check out your stack - will do so shortly 

Sent from my iPhone

> On Jun 30, 2017, at 7:56 PM, William Prothero via use-livecode 
> <use-livecode@lists.runrev.com> wrote:
> 
> Hermann:
> I got your stack. It pretty much is where I am at now. However, it doesn’t 
> solve my problem. If you notice the “geocode” call output, nothing changes 
> when the zoom level changes. This isn’t much help when trying to find the 
> lat/lon values of the corners of the image. That’s what I need. Neither the 
> “bounds” parameters nor the “viewport” parameters change with zoom level. So, 
> it doesn’t help when trying to get the corner lat/lons, which change with 
> zoom level.
> 
> Best,
> Bill
> 
>> On Jun 30, 2017, at 8:32 AM, hh via use-livecode 
>> <use-livecode@lists.runrev.com> wrote:
>> 
>> You may use the technique of a stack I made in April 2017 on base of
>> a discussion started by you in the list:
>> http://lists.runrev.com/pipermail/use-livecode/2017-April/236632.html
>> 
>> I posted it just now here (Raspi stacks collection #100)
>> http://forums.livecode.com/viewtopic.php?p=155414#p155414
>> 
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