[GRASSLIST:2424] grass 5.7 vector geometry

GRASS GRASS user
1

Hi all,
two questions:
1 - I refreshed my grass5.7 source from cvs and compiled again but it gave me
the following error:
ld error: could not find -lGL...
of course I have all the libGL (and I compiled GRASS 5.3 successfully). What
does it mean?

2 - To digitize polygons and associate attributes to them, there are actually
three parts in GRASS 5.7: the boundary, the centroid and the actual area (am I
correct?). The area itself does not contain attributes, whereas the boundary
and the centroid do. So if I want to export a shape poligon with v.out.ogr
and I select "area" as elements the exported shapefile polygon will not have
any attributes because attributes belong only to the boundary or the
centroid. If I export boundaries I get lines and not polygons.
Am I missing a trick to get areas out of grass to shape with all the
attributes?

Thanks (sorry for the long mail)

Ciao
Francesco

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2

francesco.pirotti@unipd.it wrote:

1 - I refreshed my grass5.7 source from cvs and compiled again but it gave me
the following error:
ld error: could not find -lGL...

With regard to which program? What was the actual command which
failed?

of course I have all the libGL (and I compiled GRASS 5.3 successfully). What
does it mean?

It probably means that the Makefile didn't add the necessary -L
switches.

--
Glynn Clements <glynn.clements@virgin.net>

3

On Sunday 01 February 2004 09:20, francesco.pirotti@unipd.it wrote:

2 - To digitize polygons and associate attributes to them, there are
actually three parts in GRASS 5.7: the boundary, the centroid and the
actual area (am I correct?). The area itself does not contain attributes,
whereas the boundary and the centroid do. So if I want to export a shape
poligon with v.out.ogr and I select "area" as elements the exported
shapefile polygon will not have any attributes because attributes belong
only to the boundary or the centroid. If I export boundaries I get lines
and not polygons.

Centroid's attributes are used for area.

Radim