Hei Larry,
very nice!
I think actually that is ok if it does not support union. One can do an
union afterwards.
thank you
Stefan
PS: but should we not rather disable the distance entry? (I think if one
uses the attribute calculator then this could be done previously..
however, I know that SkyJUMP does not have this feature)
Larry Becker schrieb:
The first version of Buffer "distance from attribute value" should be
available in the nightly build. Please let me know if there are
problems or suggestions. Currently it doesn't support the buffer
selection or union options.
As a first step toward the proposed formula option, an option with *,
/, +, - could be added that uses the distance entry.
Larry
On Thu, Jun 12, 2008 at 11:24 AM, Larry Becker <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
I haven't forgotten about modifying Buffer to use an attribute. I'm
working on it at home when I find time. The formula thing is
secondary to getting the feature working.
Larry
On Fri, Jun 6, 2008 at 1:43 PM, Larry Becker <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
When OJ moves to Java 1.6 (as SkyJUMP has) we could use the
scripting API. See:
http://java.sun.com/developer/technicalArticles/J2SE/Desktop/scripting/
Until then, however, it would probably involve parsing and
executing, or a simple interface like Attribute Calculator or
Simple Query.
Larry
On Fri, Jun 6, 2008 at 12:26 PM, Stefan Steiniger
<[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>> wrote:
Martin Davis schrieb:
I was thinking that the easiest thing to do would be to
set the buffer distance based on a single attribute
value. Your idea of using a formula is even better.
This seems like it would require defining a formula in
some language, and being able to parse and execute it.
Has anyone done anything like this before? (Apart from
Beanshell - which is a different thing).
yes and no.
Pirol has created a Attribute calculator that I moved over
to Ojump.
see under /Tools/Edit Attributes/Attribute Calculator
I am not sure how flexible that tool is (currently it does
also only basic math: + - * /).
Side comment: when I get JEQL bolted in to JUMP this
kind of thing will be come very easy... soon, hopefully.
Larry Becker wrote:
I agree that creating buffers based on the value of
an attribute would be useful. At my company, we do
some buffer analysis that might benefit from this
capability. I might be able to justify the time to
extend OJ's buffer tool (which is currently in sync
with SkyJUMP).
Based on Ravi's past requirements for features that
support "mineral prognostication" (I love that
term), his definition of buffers might be more
complex than mine. :-) For our use, however, I can
imagine needing the capability to compute the buffer
distance based on a formula entered by the user.
regards,
Larry
On Fri, Jun 6, 2008 at 10:50 AM, Martin Davis
<[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>
<mailto:[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>>> wrote:
Seems like a nice addition to the Buffer tool.
Should be simple
to add....
RAVI KUMAR wrote:
Hi all,
in an exercise for Mineral prognostication
now am able to
achieve most after the 'Polygon Union
Intersection' is added
and am very thankful for the same.
However on linear features (Dykes in Geology)
which are
supposed to receiving buffering as per
another attribute, find
the going repititive. Buffering has to be
done depending on an
attribute value of the same table. But am
forced to split the
data into as many classes of the attribute
for buffering them
and then add all of them (replicate selected
features) into a
layer again.
This can be solved if, Buffering can be done
with an attribute
value than a constant we are asked to provide.
Cheers
Ravi Kumar
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