Geometry Boost List: [ggl] map to cartesian

Subject: [ggl] map to cartesian
From: fausto (f4ust0f)
Date: 2010-03-30 10:24:55

That's exactly what I needed.
Thanks all.

On Tue, Mar 30, 2010 at 2:15 PM, Barend Gehrels <Barend.Gehrels_at_[hidden]>wrote:

> Hi Fausto,
>
>
>
>
>
> fausto wrote:
>
>> Hi Barend, all,
>> regarding transformations from one coordinate system to another, I can see
>> that the example below mentions Map projectons.
>>
>> http://geometrylibrary.geodan.nl/06__transformation__example_8cpp-example.html
>>
>> Is there a way to transform GIS positions into simple cartesian x,y
>> positions.
>>
>> If you were to draw a country loaded from a kml file or shapefile, how
>> would you proceed?
>> I guess you need to transform the lat/long vertex positions into x,y and
>> apply the polygon geometry for each set of x,y pairs.
>> How ggl can help in this context?
>>
>
> Sure this is possible.
> See <
> https://svn.boost.org/svn/boost/sandbox/geometry/libs/geometry/example/extensions/gis/projections/p03_projmap_example.cpp
> >
>
> which, in this case, reads from WKT (world countries), project the
> countries using the Mollweide Map Projection and outputs to SVG.
>
>
>
>  I guess it's also possible to use the simplification functions provided
>> with ggl in this context, right?
>>
> Yes, you can use them as well, either the lat-long coordinates, or the
> projected coordinates, or the coordinates in SVG-coordinate system.
>
> Regards, Barend
>
>
>
>
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