i've been thinking over the past week or so. i think it's probably better to do this app in stages.
stage 1: "service strip": this is my main selling point of the app, where you enter in your start and end points (and google will plot you a course). on that route, the app will find gas stations within a certain distance from this main route (up to 10 miles away from the main route). how do you know how much you can drive before you have to fill up? you enter your mpg and gallons in the tank, and how much gas left in the tank (for shorter trips). it will tell you how much you can go before you run out of gas with red lines on the route past the empty line. plus, with online integration with gas.com, you can see who has the lowest gas, avoid certain stations, etc. same concept applies to hotel rooms and food.
stage 2: traffic: in stage two, we insert the abilities to detect traffic updates from most cities, construction trouble spots and the ability to reroute based on these factors.
stage 3: iphone: integrate and sync all of this into the iphone so those with the iphone can change their route on the fly.
i'm starting to think the road trip-speific aspects such as budgeting and syncing with travel web sites will do better on another app, as this is more about using the powers of google maps to another level instead of travel planning. i also want this app to be usable worldwide instead of just one country, so these features will be best done elsewhere, and there will be a choice to use metric or english measurements.
and i found that photoinfoeditor found at this site
http://www.mmisoftware.co.uk/, has already used google apps in another way, and this could be a start.
comments on this?