Google maps problems

Can you zoom out on google maps when its called from app inventor without the user doing anything?

I am plotting points from a list on google maps but I have 2 problems.

1. I am using a timer to iterate through the list because I can control how fast it moves from point to point but Google Maps keeps opening even when I close the app. Is there anyway to fix this or is there another method I can use to delay moving through the list?

2. When a point is shown it is too zoomed in. How can I zoom out?

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You can apply another zoom factor, like this: 

DataUri: geo:37.8,-122.23?z=10

The zoom factor is 10 here, but you can set it to another value. You will have to experiment to find the best value.

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