Hi all!
For feedback and discussion:
Although GRASS has a great 3D vector engine, I never utilised it's
power because of the lacking possibility of direct user interaction
with 3D data (or have I missed something essential here?), i.e. the 3D
vector data can be stored, processed by many/most vector modules and
visualised within and outside GRASS, but the user cannot interact with
the data.
A first step toward user interaction would be a 2D viewer (or several
simultaneous) that can be moved in the 3D vector space to look at
(artificial) sections through the data (section needs not to be
vertical to the Earth's surface). A second step would be the
possibility to edit the vector data in these artificial sections at
the cut-points and lines (and close-by nodes projected into the
section). Together with existing and possibly new complementary tools
for interpolation, surface generation (e.g. between sections) and
autogeneration of volumes, this would be a very powerful tool.
Alternatively, such a functionality can be integrated in a 3D viewer.
An obvious application for this is the construction of a 3
dimensional vector-"models" from several intersecting profiles (e.g.
geology, spatial planning, etc.). According to the GRASS7 ideas
collection, this has been considered before - see http://grass.osgeo.org/wiki/GRASS_7_ideas_collection#Library_2
: "2d 'vertical' vector data (e.g. Geologic Cross Sections)" (What
is the problem here, isn't a section the same as a number of faces in
3D space?).
Are there more users/developers who miss this kind of functionality?
What are your thoughts?
Cheers,
Henning
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