[Qgis-user] txt to shp
Pierre Chevalier Géologue
pierrechevaliergeol at free.fr
Mon Sep 13 02:48:09 PDT 2010
Giovanni Manghi claviota:
> You have to save your data in a real CSV format,
Hm, almost: *real* CSV files are Comma-Separated-Values (smells like a
troll...;)).
> see attached file.
This one looks rather like the excel vision of what a CSV file is...
> It will be imported with no problems in QGIS.
>
Yes, as long as you specify the right separator.
Actually, you can also open the first version of your file (it was
created by excel, wasn't it?), if it is a tabulation-separated ascii
file, then you just mention \t as the separator when you import it into
qgis.
But your data looks a lot like a mag survey, doesn't it? in this case,
it is often better, instead of treating a bunch of values, to generate a
raster by interpolation. Instead of dealing with almost-evenly spaced
data points, you get a regularly-spaced grid, with the values in each
cell. Grass is excellent for these kinds of things. And it works well
with qgis as a sort of front-end. It is very fast and easy to display
colour mapping of your data, for instance, assigning colour ramps to
data values.
A+
Pierre
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Pierre Chevalier Géologue EI
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