[gdal-dev] Convert raster into points with GDAL?

[Joaquim Luis]

On 04-06-2014 13:33, Hernán De Angelis wrote:
> One option is exporting to NetCDF format and running GMT's grd2xy 
> (http://gmt.soest.hawaii.edu/doc/latest/grd2xyz.html). If the raster 
> is big this will be slow though.

If GMT was built with the GDAL link (nearly all the GMT5's and many of 
the GMT4's) you don't need to convert the grid format, just use it as 
is. And why you say it's slow (apart from the time taken to same a 
potentially big ascii file on disk)?

Joaquim

>
> H.
>
>
> On Wed, Jun 4, 2014 at 1:00 PM, Jukka Rahkonen 
> <jukka.rahkonen at mmmtike.fi <mailto:jukka.rahkonen at mmmtike.fi>> wrote:
>
>     Hi,
>
>     Is there a tool for converting rasters into vector grids, either
>     points or
>     polygons? I know gdal_polygonize but what I am after would just
>     create a
>     regular grid of points or polygons and write raster values into
>     attributes.
>     I can do that with SEXTANTE vectorization tools but I would rather
>     use GDAL.
>
>     -Jukka Rahkonen-
>
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>
>
>
> -- 
> Hernán De Angelis
>
> Glaciers & Remote Sensing                 |   Sustainability & 
> Environmental Science
> http://talesoficeandstone.blogspot.se/   | 
> http://talesofafiniteplanet.blogspot.se/ 
> <http://talesoficeandstone.blogspot.se/>
>
>
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