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Have you created any apps the require location services? Can you think of how location services can help make your next app better?
>> global positioning alone provides reasonable accuracy. Huh?
What is more reasonable than accurate to 2 meters? When I use my WiFi iPAD I can get a 4-20 meter accuracy. When I use my BB with its GPS I usually see 2-3 meter accuracy. Even indoors I usually see less than 4 meters for accuracy. I find that the maps that are superimposed on the screen are less accurate.
The sensitivity of my BB beats any Garmin receiver that I have owned. It gets GPS signals inside coffee shops even when I'm sitting 20 feet away from the windows. However deeper inside of buildings, very heavy forests.etc can cause problems. Rural settings only GPS is available as I don't see too many hotspots on I90 between Spokane and Seattle. Go figure.
What is more reasonable than accurate to 2 meters? When I use my WiFi iPAD I can get a 4-20 meter accuracy. When I use my BB with its GPS I usually see 2-3 meter accuracy. Even indoors I usually see less than 4 meters for accuracy. I find that the maps that are superimposed on the screen are less accurate.
The sensitivity of my BB beats any Garmin receiver that I have owned. It gets GPS signals inside coffee shops even when I'm sitting 20 feet away from the windows. However deeper inside of buildings, very heavy forests.etc can cause problems. Rural settings only GPS is available as I don't see too many hotspots on I90 between Spokane and Seattle. Go figure.
I have the same issues and frustrations with my in-dash Garmin navigation compared to my iOS device. It would seem that a device made specifically for navigation would out perform a mobile smartphone. GPS systems that use augmentation (NGPS, WAAS, CORS) are supposed to provide coordinates with an accuracy of 10-15 centimeters. Of course, your BB and my iPhone would need to be nuclear powered to support all of the similtaneous communications necessary to make this work.
An accuracy of two meters is more than reasonable. When a minimum of three satellites are providing information, the accuracy is consistent. When weather and atmospheric conditions become a factor, we need to look to other methods for determining position. I lose my satellite radio signal when driving under a bridge or through a tunnel.
To your point, the accuracy of the location return by the GPS does not matter if the coordinate system of the mapping software isn't accurate.
Great stuff! Thanks for the comments.
An accuracy of two meters is more than reasonable. When a minimum of three satellites are providing information, the accuracy is consistent. When weather and atmospheric conditions become a factor, we need to look to other methods for determining position. I lose my satellite radio signal when driving under a bridge or through a tunnel.
To your point, the accuracy of the location return by the GPS does not matter if the coordinate system of the mapping software isn't accurate.
Great stuff! Thanks for the comments.
My understanding is that modern web browsers -- not OSes -- are doing the bulk of the work in determining geolocation.
As I hear it, modern web browsers can and do use multiple methods to determine a device's geolocation. Depending on the device, they will dynamically attempt to use a variety of geolocation strategies/technologies -- with varying degrees of success and accuracy. -- in addition to information such as speed, heading and elevation. What is more, developers are allowed to specify an acceptable degree of accuracy.. So, when GPS is not available [or sufficiently accurate], a modern web browser will dynamically try other methods such as triangulation, crowd-sourcing, etc.
This is not to say that Apple cannot contribute code that make geolocation application development easier and efficient.
By the way, great article [with very helpful visuals on triangulation]!
As I hear it, modern web browsers can and do use multiple methods to determine a device's geolocation. Depending on the device, they will dynamically attempt to use a variety of geolocation strategies/technologies -- with varying degrees of success and accuracy. -- in addition to information such as speed, heading and elevation. What is more, developers are allowed to specify an acceptable degree of accuracy.. So, when GPS is not available [or sufficiently accurate], a modern web browser will dynamically try other methods such as triangulation, crowd-sourcing, etc.
This is not to say that Apple cannot contribute code that make geolocation application development easier and efficient.
By the way, great article [with very helpful visuals on triangulation]!
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