RFC 45 suggests several rendering improvements for Mapserver,
including adding a tag (CENTER/ORIGIN) for specifying the
centre of a symbol. This feature has, however, not been
given priority yet (there are workarounds for the most
important cases).
http://mapserver.org/development/rfc/ms-rfc-45.html
--------------------------------------------------------------
CENTER/ORIGIN [x y]
Defines the centre of the symbol using decimal pixels (x axis increasing to the
right, y axis increasing downwards).
* Is used for placing a point symbol on the map or on a “decorated” line
* Defines the center of rotation if an ANGLE is specified for point symbols.
* Default value is the centre of the symbol’s bounding box.
* Applies to TYPE ellipse, vector, pixmap, truetype.
--------------------------------------------------------------
Håvard
David Martin wrote:
I am developing a new application and am rendering around a load of
graphic symbol layers using a Map file layer such as
LAYER
NAME cape_headland_point
STATUS ON
GROUP all
DATA 'ExplorOz/Places/Cape,Headland,Point'
TYPE POINT
SYMBOLSCALE 1000000
CLASS
STYLE
SYMBOL [POIImage]
MAXSIZE 15
MINSIZE 4
SIZE 8
END
END
METADATA
"wms_title" "Capes, Headlands & Points"
END
PROJECTION
"+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs"
END
END
As you can see I am sizing the output symbol which is a 20x20px PIXMAP
image – this is working great however the position of the image needs to
be OFFSET up by half the size of the image (to make the actual point be
the center of the image) – I have tried using OFFSET however when the
image size changes (based on SYMBOLSCALE)the offsets are wrong. Is there
a way to OFFSET image symbols based on the SYMBOLSCALE and MAX/MIN SIZES?
Regards
David
--
Håvard Tveite
Department of Mathematical Sciences and Technology, UMB
Drøbakveien 31, POBox 5003, N-1432 Ås, NORWAY
Phone: +47 64965483 Fax: +47 64965401 http://www.umb.no/imt/
_______________________________________________
mapserver-users mailing list
[email protected]
http://lists.osgeo.org/mailman/listinfo/mapserver-users
