#1000: v.category option=del doesn't delete multiple cats per object ----------------------------------------------------------------+----------- Reporter: needelsd | Owner: [email protected] Type: defect | Status: new Priority: normal | Milestone: 6.4.0 Component: Vector | Version: 6.4.0 RCs Keywords: v.category v.to.points v.clean delete replace cats | Platform: Unspecified Cpu: Unspecified | ----------------------------------------------------------------+----------- The manual for for v.category option=del states that it will "delete all categories of given layer". However, only one cat per object is deleted for objects with multiple cats (listed separated by a "/").
Here is a Spearfish example that starts with a line vector with multiple segments, generates a point vector from the nodes (in layer 2), removes the resulting duplicate points, and then attempts to delete the layer 2 cats in order to generate new cats with sequential values. # Extract 5 lines, extract nodes into layer 2 v.edit map=L_1 tool=create --o v.edit map=L_1 tool=copy ids=17,424-426,496 bgmap=roads v.to.points -n input=L_1 output=P_1_raw # Remove duplicate points (overlapping nodes from adjacent segments) v.clean input=P_1_raw output=P_1 tool=snap,rmdupl thresh=.1,-1 type=point --o # Replace cat values with sequential values v.category input=P_1 output=P_1_no_cats option=del layer=2 --o v.category input=P_1_no_cats output=P_1_cats option=add layer=2 --o # Expected result- layer 2 cat values 1-6 v.category input=P_1_cats option=print layer=2 ## cat 1 2 1 2 3 6 # The v.clean tool=rmdupl step results in objects with multiple cats separated by "/" v.category P_1 option=print layer=2 ## cat 4 9 10/1 5/2 8/3 7/6 # The v.category option=del step only removes the first cat of each pair v.category input=P_1_no_cats option=print layer=2 ## cat 1 2 3 6 -- Ticket URL: <http://trac.osgeo.org/grass/ticket/1000> GRASS GIS <http://grass.osgeo.org>
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