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Surveyor - measure distances with a single click on your phone

Surveyor is a mobile application runs on Android platform, iPhone 4 and 4th generation of iPod Touch. It can help you estimate distances within visual range with the help of camera and orientation sensors on your device.

It uses data from orientation sensors and the camera image to determine 3D coordinates of the object you selected and then give you the distance from the object to you or another object.

All you have to do is simply point your phone to the object and then click its video image on the screen at the point where that object touches ground. Detailed guidance have been integrated in the Surveyor application for your convenience.

However the simplicity comes with 2 limitations:

1. It can only measure distances on a flat level surface, sloped or vertical surface won't work.
2. The altitude from the level surface to the device should be given to Surveyor as parameter. If a wrong altitude is set, the result will not be accurate.

Surveyor is a freeware, you can download it from Android Market and AppStore. In Android Market just search the name "surveyor". In AppStore its name is "GyroSurveyor", because it uses gyroscope and the name 'Surveyor' is already taken by another app.

Surveyor in Android Market
GyroSurveyor in AppStore