[webmap-discuss] Client side coordinate transformation library - Call to developers/testers

[Steven M. Ottens]

Hi Aaron,

Just for your information; Mapbuilder has a proj lib based on gtcp, it
is still there but we've decided to move away from GTCP and towards
proj.4 for various reasons. You can have a look at our GTCP code,
several transformations are supported. For more information on the
reasons I advise to contact Richard Greenwood (from the cst demo mail a
few hours ago)

Regards,
Steven

Aaron Koning wrote:
> Hello All,
>
> A while ago I created a client side coordinate transformation library
> called GCTP-JS (Open Source, GPL licence). More accurately, I ported
> files directly from the General Cartographic Transformation System
> (GCTP) C-code to JavaScript.
>      http://datashare.gis.unbc.ca/gctp-js/
> <http://datashare.gis.unbc.ca/gctp-js/>
>
> Simple example application:
>      http://datashare.gis.unbc.ca/gctp-js/examples.php
>
> Implemented easily and successfully in the Flexible Internet Spatial
> Template (FIST) web mapping application:
>      http://fist-mapping.org <http://fist-mapping.org/>
>
> Currently the 'port' is not complete (UTM, Albers, and Lambert
> projection files have been ported). What I would like to see is a
> complete port of the GCTP to JavaScript. Porting each projection file
> takes a few hours to a few days depending on experience level (pretty
> quick I think). Then the projection file must be tested, which is best
> done by someone who uses that particular projection often.
>
> The best reasons to get involved are:
>      - porting and testing can be done file by file;
>      - porting a file doesn't take very long;
>      - only work on the projections you want or the whole library;
>      - very little planning is needed since it is a straightforward
> porting exercise;
>      - there is a definite and achievable end goal!
>
> Therefore, I would like all interested parties to contact me at the
> address below and start porting and testing projection files as soon
> as possible. I am eager to get going and help make this a success!
>      aaronkoning at gmail.com <mailto:aaronkoning at gmail.com>
>
> The GCTP C-code can be downloaded at:
>      http://edcftp.cr.usgs.gov/pub//software/gctpc/gctpc_src.tar
> <http://edcftp.cr.usgs.gov/pub//software/gctpc/gctpc_src.tar>
>
> Thank you for your time,
> Aaron
>
> +--------------------------------------------
> |  Aaron Koning
> |  Information Technologist
> |  Prince George, BC, Canada.
> +--------------------------------------------
> |   http://datashare.gis.unbc.ca/fist/
> |   http://datashare.gis.unbc.ca/gctp-js/
> <http://datashare.gis.unbc.ca/gctp-js/>
> +-------------------------------------------- 


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