iphone - Camera overlay view mathematics with Lattitude and Longitude -

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i have been working on augmented reality application displays predefined map-points on camera overlayview nicely generated frame windows per map-points includes details map-point, image, , miles away current location. have done , application looks better not able achieve arranging view-points such creates 3d effect attached images. these images of acrossair ar (http://www.acrossair.com/acrossair_app_augmented_reality_browser_for_iphone_3gs.htm) application.

if these images, feel available(predefined) map-points displayed on giant view , can smoothly move points , down finger touch.

i have 2 questions. if can me in way appreciated. have researched enough gave , stuck in application.

q1: have done every time iphone heading changes, calculate , display visible points happens when move iphone can feel points added , couple of points removed doesn't happen in acrossair application. want create view acrossair in given pictures user doesn't feel addition/removal of points , moving points should smooth.

q2: if noticed pictures creates 3d kind of view view points when make iphone almost horizontal. implementation doesn't happen, shows couple of points @ time. have use finger move points , down. if give thoughts on how implement 3d kind functionality great.

any inputs on helpful me. in advance.

image 1 on iphone image 2 on iphone image 3 on iphone


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