Re: New attribute suggestion

Hi Moon-Sang Lee,

The use cases are interesting and most useful.  However, i am not sure  
why you couldn't implement this with the current api?

For example:

navigator.geolocation.watchPosition(success_callback, null, null);

function success_callback(position)  {

var request = new XMLHttpRequest();

request.open("POST",
                       "http://dougturner:xxxxx@twitter.com/account/update_location.xml?location= 
" + position.longitude + "," + position.latitude,
                       false);
request.send(null);

}

if the script has access to the file system, then you can write it  
there.
if there isn't access to the network, you can just add these locations  
to an array and push when there is reception/net-access.

Doug

On Dec 1, 2008, at 10:52 PM, Moon-Sang Lee wrote:

>
> Dear Geolocation WG members,
>
>
> Hello everybody.
>
> I’ve heard about this WG a few days ago, and briefly read the  
> editor’s draft.
>
> And I’d like to suggest to discuss about position logging.
>
> In accordance with position acquirement, can we log the acquired  
> current
>
> position into a repository? A repository can be a local file in a  
> portable device
>
> or it can be a remote server.
>
> If we extend the Gelocation API to log one’s position, it can  
> support many useful
>
> use cases and help application developers work easy.
>
> Here is our proposal for extending the current Geolocation API  
> draft, if it’s still open.
>
>
> [ Location Logging ]
>
> We think Geolocation API would be much better when it adopts logging  
> facility.
>
> (i.e. It’s different from caching one’s position.) The use cases for  
> this feature are
>
> as below.
>
>
> - Preventing the emergency situation
>
> Let’s assume that a person is climbing a mountain on a weekend. A  
> portable device
>
> which he carries in his bag or pocket traces the location of himself  
> by using the local GPS
>
> or broadband network. If he enters into a dangerous area where he  
> may lose his way,
>
> the device warns him that it’s not safe to go further in that  
> direction. In addition,
>
> his position is periodically recorded to the local device storage or  
> delivered to a remote
>
> rescue server if he had configured the automatic logging. In this  
> case, the device plays
>
> as a personal black-box, which can be used to rescue him in an  
> emergency
>
> if his position is periodically delivered to a remote rescue server.  
> Furthermore, he can upload
>
> his trace to his own blog while recommending his pleasant journey to  
> his friends.
>
>
> - Asking emergency aid
>
> Let’s assume that a person is entering an area where crime is rife  
> in a dark rainy night.
>
> The portable device notifies him of such dangerous situation. But,  
> he decides to go on
>
> since he is in a hurry for appointment. He turns on the soft-911  
> mode of his device to verify
>
> the location of the nearest police man and to let the policeman know  
> his location for
>
> provision against emergencies. In case of emergency, he can easily  
> manage the situation
>
> by sending the request for emergency aid to the nearest policeman  
> who has been tracking
>
> his position. The track under the soft-911 mode is temporarily  
> stored to a remote 911 server
>
> until he turns off the mode.
>
>
> For above use cases, it’s necessary to store one’s position for a  
> while, and we need
>
> additional functionalities besides those in editor’s draft. The  
> required features are as below.
>
> -       Whether to log : boolean flag (True/False)
>
> -       Where to log : log repository (URL)
>
> -       When to log : logging frequency (TimeInterval)
>
> Obviously, these features can be handled by application, but it’s  
> too complicated to control
>
> logging without these features. We think that our proposal would  
> raise new kind of web service
>
> and proliferate storage backend of cloud-computing.
>
>
> interface PositionOptions {
>
> attribute boolean enableLog;       /* added */
>
> attribute string    loggingURL;     /* added */
>
> attribute long     interval;          /* added */
>
> attribute boolean enableHighAccuracy;
>
> attribute long     timeout;
>
> attribute long     maximumAge;
>
> };
>
>
> Thanks for reading.
>
>
> With regards,
>
> Moon-Sang Lee & Min-Soo Koo
>
>