Hi Jukka,
Should be quite simple to add. Do you want to test your programmer skill
on this feature ?
Otherwise, create a feature request, I'll try to find some time.
I have needed start and end points some times ago. And as I did not know
it was possible
with Sextante I found the following workaround :
- extract points : select points with sequence_id = 0 -> start points
- revert all the lines
- repeat the operation -> end points
Michaël
Le 22/06/2015 10:26, Rahkonen Jukka (MML) a écrit :
Hi,
I thought that there would be a tool for selecting endpoints and
startpoints of geometries like we can select centroids but I could
only find such tool from the Sextante toolbox under the Topology
category. I am happy with the Sextante tool now once I found it but
the task feels rather simple and it might be useful to have it also as
a native tool.
We do have “Extract points” tool which can be used for finding the
start points by selecting points with sequence_id from the result set.
However, for end points the sequence_id varies. How about making a
comprehensive Extract points tool with some enhancements? New check
boxes should be added
-extract all points
-extract start points
-extract end points
“All” should be mutually exclusive with the “start” and/or “end”
selections and there might be new Boolean type columns “is_start” and
“is_end” which would be populated also for the “All” selection. The
attributes of the three-point resultset of “All points” run for a
three-vertex line would look like:
FID item_id sequence_id is_start is_end
10 1 1 0
20 2 0 0
30 3 0 1
-Jukka Rahkonen-
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