There is the GDAL rasterize method, however that is designed to translate vector
polygons into raster representations. Converting points to raster is a very
simple task and does not really need a method; converting lines is slightly less
trivial, however these are issues with regard to how to represent phenomena that
have no width in a cellular environment which the user will need to consider.
Peter
Smart, Gary wrote:
Oh - I see. I can open them now and wander through their layers and vector
points. Thank you.
I don't suppose there is a utility/convience function to 'rasterize' the
information within a 2D vector file (e.g. vector map) by any chance (i.e.
rather than drawing them using OpenGL or something)?
Gary
-----Original Message-----
From: Even Rouault [mailto:[email protected]]
Sent: 20 July 2009 22:03
To: [email protected]
Cc: Smart, Gary
Subject: Re: [gdal-dev] How do I open vector files (e.g. shp) using GDAL
Le Monday 20 July 2009 22:51:13 Smart, Gary, vous avez écrit :
I understand that GDAL can open vector formats as if they were a
dataset?
No, not exactly. GDAL is for the raster formats. OGR is for the vector
formats. They have each their concepts, API and notions. See the OGR
documentation : http://gdal.org/ogr/
E.g. I read that it is possible to pass the GDALOpen either a single
.shp file (in which case it treats it as if it only had one layer) or a
directory containing multiple .shp files - which presumably it opens as
multi layered?
However, whenever I try to open vector files in this way (directory or
file) I get...
ERROR 4 - blah blah is not recognised as a supported file format"
I am still new to all this (having only just conquered raster formats)
so I suspect I am doing something pretty dumb.
Perhaps someone can help?
Gary
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Peter J Halls, GIS Advisor, University of York
Telephone: 01904 433806 Fax: 01904 433740
Snail mail: Computing Service, University of York, Heslington, York YO10 5DD
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