About google app engine with google map api

Hello, everyone.

I have some trouble in building the data using the demo in
http://code.google.com/intl/zh-TW/apis/maps/articles/geospatial.html.
My question is how the data flow in section "Data Flow"? I want to
know where the s/search is? And what type of data it is?
I see the section in the article write:「Typical JSON data returned by
's/search' service is shown below.
{"status": "success", "results": [{"phone_number": "(908) 436-6855",
"city": "ELIZABETH", "name": "ELIZABETH HIGH",
"school_level": 3, "enrollment": 5279, "highest_grade_taught": 12,
"lowest_grade_taught": 9, "school_type": 1,
"locale_code": 21, "state": "NJ", "address": "600 PEARL STREET",
"lat": 40.6603361, "lng": -74.2116865, "school_id":
"340459005478", "zip_code": 7202}]} Once JSON data are successfully
returned to the callback function, the entities inside the data get
parsed out and rendered properly on the map as markers. Detailed info
shows in a pop-up info window when a marker is clicked」,
My question is how to build the data use this way. Can anyone give me
some solution? Thanks!!!
If you can give me some example is better.Or you have better idea.

Then, I also want to show my data with google chart api, just like the
data in this demo show on a window on th map when you click it, but
it shows the text value,in my case,i want it to show with google chart
api. And besides I want the data show on the small area to sum up
together.

If you have any idea, can you teach me? Thank you very much.

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