Google Static Maps Problem

[William Prothero]

Jonathan:
Here is a link to my test stack and some files I found that have various code to find the corners of the downloaded map.
https://www.dropbox.com/s/8xle2hrltx9ll0d/googleMapsAPiTests.zip?dl=0 <https://www.dropbox.com/s/8xle2hrltx9ll0d/googleMapsAPiTests.zip?dl=0>
My start on a conversion is in the script of the “Get Corners” button. I can get an xml file from the regular maps api, but the “bounds” property doesn’t change with zoom, which makes it not obvious how to convert that to what is being displayed, to get the corners. I have no problem converting pixels to mercator lat/lon, but until I can figure out the relationship between pixels and zoom levels, I’m stuck.

Thanks for any help. I know your augmented Earth application uses these maps too, and I’m also willing to share code when I get this working.

Bill P

> On Jun 30, 2017, at 3:50 AM, Jonathan Lynch via use-livecode <use-livecode at lists.runrev.com> wrote:
> 
> Hi Bill,
> 
> Can you share the LC code and JS you are using? 
> 
> Sent from my iPhone
> 
>> On Jun 29, 2017, at 9:59 PM, William Prothero via use-livecode <use-livecode at lists.runrev.com> wrote:
>> 
>> Folks:
>> I’ve found a way to display an image of a google static map, in my app. It’s quite easy and well-documented. However, I need to get the lat and lon values of the corners of the map, at the displayed zoom level. There is a simple-looking javascript example for doing this at:
>> https://stackoverflow.com/questions/12507274/how-to-get-bounds-of-a-google-static-map <https://stackoverflow.com/questions/12507274/how-to-get-bounds-of-a-google-static-map>
>> My javascript knowledge is totally minimal and I am loath to learn javascript just to get this one handler into livecode script.
>> 
>> What I have is an application that plots geophysical data on a world map. The map kind of ugly at very high magnifications and I thought the google map would give me a nice map image, with a wider range of magnifications, and minimize local storage space. What I will do is display the map image (centered on a particular lat/lon and magnification) in a rectangle, then take a snapshot, then copy my data symbols and images into the resulting snapshot. This works very will with my current map. I know that I can draw symbols directly on a google map using the map api, but it will be much more direct, and build on existing code, if I do it as described.
>> 
>> So if anyone who is familiar with javascript has a few moments to give me some pointers on how I might convert this to LCS, I’d very much appreciate it. What I’m scratching my head over is how to access the parameters from the Google API to do the needed calculations. The link above is to the javascript example.
>> 
>> Thanks in advance,
>> Bill P
>> 
>> William A. Prothero
>> http://earthlearningsolution.org/
>> 
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