Icon and map mark design for location based mobile information system

We have four groups of graphic design requirements:
1. 57 * 57 pixel icon for the application of Location-Based mobile service map system. The icon need to reflect the main objectives of the system, such as map, friend, business, rating.

2. A group of 57 * 57 pixel sub-category icons, including restaurants, nice scene, ATM/bank office, grocery store, asian restaurant, indian restaurant, and night club/bar. Each icon need two versions, one is enabled status, another is disabled status. The disabled version could be a grayed out version of enabled version. That's just represent the sub-category, need to let user clearly understand the meaning of the icon.

3. A group of map mark icons which are all in 25 * 25 pixel. The icons includes: 1. Good place. 2. Fair place. 3. Hot place ( a lot of attention) 4. place with extra coupon 5 grand opening. 6 has special discount 7. Cheap place 8 Prestige place.
Some different size example google map mark icons at: http://mashable.com/2007/09/20/custom-google-map-icons/ , http://faculty.unlv.edu/jensen/CEE_4...EarthIcons.jpg, http://www.journerdism.com/wp-conten...6/04/mappy.jpg.
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