[Proj] website cartographic executables---a query

Paul Ramsey pramsey at refractions.net
Sat Dec 17 17:19:24 EST 2005

For geodesics, I think the Great Circle Mapper <http://gc.kls2.com/>  
is wonderful fun.


On 17-Dec-05, at 1:00 PM, Gerald I. Evenden wrote:

> On Saturday 17 December 2005 02:46 pm, Frank Warmerdam wrote:
> 	...
>> Gerald,
>> A PROJ.4 based web based coordinate system transformer is implemented
>> according to an earlier version of the WCTS protocol at:
>>   http://maps.gdal.org/wcts/
>> Check out the "HTML Form" link for the interactive form, though it is
>> very EPSG oriented in terms of selecting coordinate systems.
> Konqueror had problems with several of the pages for "HTML Form".
> Firefox did a little better as did Safari.  I have not tried M$ yet.
> At the moment, I am trying to stay with the most elemental of HTML
> forms and php4.
>>> I would appreciate any comments on the usefulness of the above ideas
>>> and the feasibility of implementation.  Also, any recommendations
>>> on website hosts would be appreciated.
>> The OGR WCTS server is built around an OGC protocol, and
>> ultimately the HTML interface to this lacks some usability.  I
>> have encountered a few other web projections interfaces over
>> the years, though I can't point to any of them just now.
> At the moment I am trying to minimize the alphabet soup as
> it is a bit over my head.  Bad enough getting used to working with
> sessions, et al..  :-)  PHP is easy enough as it is a pretty close  
> clone
> of C,  The benchmark browser is Konqueror and if it can handle it,
> any other browser should consider it a breeze.
>> I think it would be nice, and not particularly hard, to build an
>> HTML inteface to "lproj" or similar services, using the PROJ.4
>> syntax for coordinate systems.
>> If you want, I would be happy to provide an account for this
>> purpose on www.gdal.org.
> Let me get a sampler with the geodesic procedure going.  We could
> see about putting this simple project up as a test case.  No C  
> binaries
> required for it.  Right now my head is going in circles managing this
> loop of pages.  As I imagine it now, it consists of a form page with
> all the entries (freely editable) and a radio selection: forward,  
> inverse,
> reset, etc.. I have an airport file that I would also like to be  
> able to query
> to set the pt. A or pt. B coordinates.  Similarly for ellipsoid and  
> distance
> units.  Nearly every operation loops back to the main page with an
> updated form.  Cosmetics and css come later. ;-)
> The geodesic is a learning project.
>> Best regards,
>> --
>> --------------------------------------- 
>> +-----------------------------------
>> --- I set the clouds in motion - turn up   | Frank Warmerdam,
>> warmerdam at pobox.com light and sound - activate the windows |
>> http://pobox.com/~warmerdam and watch the world go round - Rush    |
>> Geospatial Programmer for Rent
> -- 
> Jerry and the low riders:Daisy May and Joshua
> "The being cannot be termed rational or virtuous,
> who obeys any authority, but that of reason."
> ---Mary Wollstonecraft 1792
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