Thomas,
See comments below.
Best Regards,
Brent Fraser
On 12/11/2011 12:26 PM, thomas bonfort wrote:
I think this is all expected behavior, although the documentation may
be incorrect.
LABELPNT draws a marker on the geographic position the label is
attached to. This corresponds to the center of the label text only if
the label is in position CC.
I think that is what is intended but my original test case (using CC )
resulted in the LABELPNT rendered on the left side of the labelpoly, see
http://lists.osgeo.org/pipermail/mapserver-dev/attachments/20110526/47c9bc8c/labelpnt-0001.png.
I had expected it to be coincident with the yellow circle and green
cross.
To draw a label at the center of the label text, another geomtransform
would have to be implemented, named e.g. LABELBBOXCENTROID.
or maybe
GEOMTRANSFORM (centroid([LABELPOLY]))
regards,
thomas
On Sun, Dec 11, 2011 at 19:34, Brent Fraser<[email protected]> wrote:
Hey Jeff,
I've been looking into this too (not finished yet). I'm using v6.0.1 and
can reproduce my original results (blue dot to the left) AND Ian's (grey dot
coincident with white dot). Very strange. My shapefile dataset gets
reprojected from geographic to UTM, so that may be causing the difference.
I need to look into that...
Best Regards,
Brent Fraser
On 12/11/2011 10:57 AM, Jeff McKenna wrote:
On 11-12-11 11:20 AM, Ian Walberg wrote:
Here is the map file we are using ms4w 3.0.3.
We thought the larger grey circle should be drawn in the center of the
label text.
What have we done wrong?
I have done some testing on this on Windows, with MapServer trunk
(6.1-dev), here are my findings:
- I used Brent's original example styles (from
http://osgeo-org.1803224.n2.nabble.com/GEOMTRANSFORM-labelpnt-location-td6408065.html)
with Ian's FEATURE layer --> Brent's "Blue Dot" LABELPNT with POSITION CC is
now correctly placed in the center of the label text (so it seems this has
been fixed in the code, but I can't find the ticket that says that)
- If I change to POSITION LR (as in Ian's example layer) then I get Ian's
issue (LABELPNT is placed at the geometry location, not in the center of the
label text
- but this is now an issue of understanding the developer's logic (from
that thread SteveL says "Let me ponder this and get back to you. I think it
makes sense to use the label point geotransform only with position CC so
that it matches actual shape location.")
That's all I know at this point (ha pun).
-jeff
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