[OpenLayers-Users] Measure Distance? Ruler?

[Mike Adair]

Linda,

Not as much as I would have liked, but I did merge Chris's changes back 
into the proj4js SVN and converted some more projection class code to 
the correct format for proj4js.  This wouldn't involve any changes to 
the OpenLayers.Projection class code that we came up with at the code 
sprint, just the underlying library.  I will try to update my sandbox 
with that this week.  I'm not sure of the progress within OL itself as 
to how it uses the projection support.

Mike

Linda_Rawson wrote:
> Mike,
>
> I was wondering if you had made progress on this project of yours.
>
> Thanks,
> Linda
>
> Mike Adair wrote:
>   
>> FYI, I'm hoping to have the Proj4js (or cscs) library finished up in a 
>> few weeks so you should also be able to use that to convert point coords 
>> between projections, and do the math in map projected space.
>>
>> Proj4js is a port of Proj4 to Javascript, and will use 
>> spatialreference.org for lookup of projection parameters, if a 
>> particular projection isn't known already and it includes datum
>> transforms.
>>
>> Mike
>>
>>
>> Erik Uzureau wrote:
>>     
>>> PS. If anyone is considering building this and would like to share the
>>> code with the OL repository, we would (again) be delighted. Please
>>> contact me or any of the other PSC members and we can set you up with
>>> wiki/trac passwords, access to a sandbox, and help you with
>>> code/design decisions.
>>>
>>>
>>>
>>> On 8/21/07, Erik Uzureau <erik.uzureau at metacarta.com> wrote:
>>>   
>>>       
>>>> all:
>>>>
>>>> Here is the official ticket in OL's TRAC for the path measuring tool:
>>>> http://trac.openlayers.org/ticket/173
>>>>
>>>> There is also an open ticket for an *area* measuring tool:
>>>> http://trac.openlayers.org/ticket/782
>>>>
>>>> Erik
>>>>
>>>>
>>>> On 8/20/07, Chris Hardin <chrislhardin at gmail.com> wrote:
>>>>     
>>>>         
>>>>> It's been quite accurate for me.
>>>>>
>>>>>
>>>>>
>>>>> On 8/20/07, Lance Dyas <lancelot at inetnebr.com> wrote:
>>>>>       
>>>>>           
>>>>>> There is accurate distance measurement using the Vincenty distance
>>>>>> formula...
>>>>>> Haverine is umm simulating the earth as sphere and is not accurate.
>>>>>> What Open Layers lacks is a gui for measurement.
>>>>>>
>>>>>>         
>>>>>>             
>>>>> --
>>>>> Chris Hardin
>>>>> Software Architect
>>>>> Archetype Corporation
>>>>>
>>>>>       
>>>>>           
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>>>
>>>
>>>   
>>>       
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>>     
>
>