Differences
This shows you the differences between two versions of the page.
projs:actcat:home [2011/07/19 16:29] zfy7113639 |
projs:actcat:home [2011/07/19 18:07] (current) zfy7113639 |
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Sensor attributes | Sensor attributes | ||
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Location <CLLocation> | Location <CLLocation> | ||
altitude: for getting the height, just like the altitude in geography. Measured by meter | altitude: for getting the height, just like the altitude in geography. Measured by meter | ||
- | latitude, longitude: just same as those in geography. | + | coordinate(latitude, longitude): just same as those in geography. |
For latitude, the range should be [-90(south pole), 90(north pole)]. | For latitude, the range should be [-90(south pole), 90(north pole)]. | ||
For longitude, the range should be [-180(west of the prime meridian), 180(east of the prime meridian)] | For longitude, the range should be [-180(west of the prime meridian), 180(east of the prime meridian)] | ||
+ | |||
+ | course: | ||
+ | Course values are measured in degrees starting at due north and continuing clockwise around the compass. Thus, north is 0 degrees, east is 90 degrees, south is 180 degrees, and so on. Course values may not be available on all devices. A negative value indicates that the direction is invalid. | ||
+ | |||
+ | |||
+ | horizontalAccuracy | ||
+ | The radius of uncertainty for the location, measured in meters. | ||
+ | The location’s latitude and longitude identify the center of the circle, and this value indicates the radius of that circle. A negative value indicates that the location’s latitude and longitude are invalid. | ||
+ | |||
+ | |||
+ | speed:The instantaneous speed of the device in meters per second. | ||
+ | |||
+ | time:The time at which this location was determined. | ||
+ | |||
+ | verticalAccuracy:The accuracy of the altitude value in meters. The value in the altitude property could be plus or minus the value indicated by this property. A negative value indicates that the altitude value is invalid. | ||
+ | |||
+ | |||
+ | Accelerometer <UIAccelerometer> | ||
+ | |||
+ | x, y, z: the accelerometer for the device in triple direction | ||
+ | |||
+ | timestamp:The relative time at which the acceleration event occurred. | ||
+ | |||
===== Telemetry Mining ===== | ===== Telemetry Mining ===== |