Zoom in the map to a certain area by using plot_google_map after that apply ginput

I am using plot_google_map on my work and I would like to plot a series of point on the map by using ginput. But there a problem which is the map is unable to zoom in if ginput is used.

My problem is, can it be zoom in to a certain area first, after that only apply the ginput? Also can I load the map without any label or maybe disable the label? I would like to save down all the location (longitude and latitude) of those points that generated by the algorithm.

The attached code is work on an image. By using ginput(2), choosing the start and end point, there will be a series of point generated based on line equation.

Anyone can help??