[Loadstone] Points and Checkpoints

Shawn Kirkpatrick shawn at loadstone-gps.com
Mon Nov 3 23:04:13 GMT 2008


Every point has an id field. This is usually set to the timestamp of when 
the point is created. The combination of the id and userid fields creates a 
unique id for each point that doesn't change. This way all other point 
information can be updated.

On Mon, 3 Nov 2008, Miko³aj Rotnicki wrote:

> Hello,
>
> I know what a userid is, but what do ypu mean by the id?
>
> Mikolaj
>
>
> 2008/11/3 Shawn Kirkpatrick <shawn at loadstone-gps.com>:
>> No, the coordinates are not matched, only the id and userid are used for
>> matching. This allows a point's coordinates to be updated in the database.
>>
>> On Wed, 29 Oct 2008, Miko³aj Rotnicki wrote:
>>
>>> Hello,
>>>
>>> Thanks for the answer.
>>> But are the points in the database and checkpointlist still matched by
>>> the coordinates only?
>>>
>>> Mikolaj
>>>
>>> 2008/10/29 Shawn Kirkpatrick <shawn at loadstone-gps.com>:
>>>>
>>>> A point's id and userid are used to relate it to the database. When a
>>>> checkpoints file is loaded the currently loaded database is checked to
>>>> see
>>>> if any of the checkpoint data is out of date. If so, then the information
>>>> about the point from the database is used. If the checkpoint isn't found
>>>> in
>>>> the current database then the information is used as supplied. If you
>>>> update
>>>> a point's information and you have that point marked as a checkpoint then
>>>> you should probably resave your checkpoints file to make sure all
>>>> information is up to date. If you only ever use a single database then
>>>> you
>>>> don't have to worry about this as much.
>>>>
>>>> On Tue, 28 Oct 2008, Miko³aj Rotnicki wrote:
>>>>
>>>>> Hello,
>>>>>
>>>>> Which "fields" associate (link) a point to a checkpoint (in the
>>>>> checkpoint list)?
>>>>> As for versions prior to 0.70, I believe, a checkpoint data consisted
>>>>> only of latitude and longitude
>>>>> for example a checkpiont data was:
>>>>> 52.0543951  16.4325653
>>>>>
>>>>> which anabled the association (link) to a point:
>>>>> "Point name",520543951,164325653,1,0,0,1,1225189128
>>>>>
>>>>> Since 0.70, checkpoint data are almost the same as point data.
>>>>> Sometimes extended with a comment "field".
>>>>>
>>>>> So which "fields" do the linking now?
>>>>>
>>>>> What is the synchronnization between the point and checkpoint data?
>>>>> Please explain in details if possible.
>>>>> What will happen to the checkpoints data when I update the point's name?
>>>>>
>>>>> Hope my questions are clear.
>>>>>
>>>>> Mikolaj Rotnicki
>>>>> _______________________________________________
>>>>> Loadstone mailing list
>>>>> Loadstone at loadstone-gps.com
>>>>> http://www.loadstone-gps.com/mailman/listinfo/loadstone
>>>>
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