Index: description.html
===================================================================
RCS file: /home/grass/grassrepository/grass6/vector/v.to.points/description.html,v
retrieving revision 1.6
diff -u -r1.6 description.html
--- description.html 26 Aug 2006 18:22:29 -0000 1.6
+++ description.html 27 Sep 2006 02:46:23 -0000
@@ -14,10 +14,33 @@
v.segment.
-The -v parameter is used to digitize points that fall on the line's vertices only.
+The type parameter is used to control which input vector geometry types to convert into points.
+Some caveats to consider about this parameter:
+
+
+
+Points and centroids can be considered as "lines" with only one node. Consequently, the result of selecting point or
+centroid as the type parameter is that all points/centroids get written into the output vector. The
+original category numbers of the input points/centroids get written to the 'lcat' attribute in layer 2
+of the output vector. All values for along are zero in the output vector, as only point geometry was used for input
+(there is no linear distance to calculate along, as each point/centroid is the start and end of its own "line".
+
+
+
+Boundaries are treated as lines, with points getting interpolated along the boundary perimeter according to dmax. If two
+adjoining polygons share a topological boundary, the boundary only gets converted to points once.
+
+
+
+If the type paramter is set to area, the boundary of each area is converted to points regardless of whether
+or not there is a topological boundary between adjacent areas. In other words, the common boundary of two adjoining areas,
+for example, gets converted to points twice. The centroid is not converted to a point in the output vector for type=area.
+
+
+The -v flag is used to digitize points that fall on the line's vertices only.
dmax is ignored in this case.
-If the -i flag is used in conjunction with the -v parameter, v.to.points will digitize points
+If the -i flag is used in conjunction with the -v flag, v.to.points will digitize points
on the line vertices, as well as interpolate points between line vertices using dmax as the
maximum allowable spacing.