Geography Reference
In-Depth Information
tures that belong to the same overall “thing.” An example is a parcel
of land divided by a river. When you digitize, you will have two poly-
gons, but they both are the same parcel of land—they have the same
owner, tax ID, or what have you. We can digitize the first polygon and
set its attributes. Then when we digitize the second, rather than assign-
ing a new category number and duplicating all the attributes, we just
copy them from the first parcel using the
Copy categories
tool. So, this
tool is good when we are working with multipoint, multilinestring, or
multipolygon features.
This section is about digitizing and editing with GRASS, and you're
thinking “all we did was talk about digitizing.” Well, as with most of
the editing-enabled applications, the operations are pretty much the
same. How do we edit the features in GRASS? Just start up
v.digit
from
the GIS Manager or from the GRASS shell. We can also manipulate the
attribute data using the
db.
suite of commands.
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