I would have thought : create a linesegment that is the equator and perform
an intersection between that linesegment and the target geometry to
identify the point in question and then create a new geometry with the new
point, or something like that.
I am not sure what it would mean to add a point
Hi
I have a vector layer (like /usr/share/qgis/resources/data/world_map.gpkg)
and I need to add a point at latitude 0 for every segment (in line or
polygon) that crosses the equator.
How can I do it?
Thanks,
Javier.
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Thanks Paul
I don't know if I was clear. Every segment that crosses the equator should
become two segments, with the common point at lat=0.
(I do not need the points themselves, I just want to add points to the
lines and polygons, making "explicit" where they cross the equator).
On Sun, 26 Jan 20
Create a new geometry,
iterate through each segment of the old geometry
if the segment does not intersect the equator, add that segment to the new
geometry,
else, use the intersection point to create two segments in the new
geometry.
On Sun, 26 Jan 2025 at 12:49, Javier Jimenez Shaw
wrote:
> Th
Hey Javier,
Maybe create 2 geometries, southern and northern hemisphere, then do an
intersection of both with your source geometries. You would have to
create new fid as the new geom's would the same fid. Untested, something
like this:
ogr2ogr -dialect sqlite -sql @newGeom.sql target.gpkg so
