On 8/24/2017 5:47 PM, Basques, Bob (CI-StPaul) wrote:
All,
I’m working on a Parcel Assessment app that will display Parcel edges
and which streets they abut. I’m trying to label each edge of the
parcel with it’s Edge length, but the positioning of the labels is not
at all what I’m expecting in the output. Here is a sample image:
https://www.dropbox.com/s/ppp1cihnl4flycf/rc_parcels_assessment.02.png?dl=0
The blue lines represent a connection from the center of each of the
parcel edge segments being assigned, to the approriate Street/Alley
centerline (not shown). I can’t seem to get the labels to center them
selves on the segments. There should be one distance label centered on
each segment at the start of each of the blue lines where they intersect
the red parcel edges.
My next workaround would be to use a centroid of the line as the label
point. I think I’ve tried all available combinations of settings in the
Mapfile, but maybe I missed something.
Anyone have any ideas?
In the LABEL use a geotransform "center" to create the label point, but
this has the problem that you have a point so you have to precompute the
ANGLE [angle] in the SQL and make that available to align the label with
the edge.
-Steve W
Here is the Label layer for the Parcel edges:
LAYER
NAME 'Parcels-Query-Edges'
STATUS ON
TYPE LINE
METADATA
"ows_title" "Parcels-Query-Edges"
"gml_include_items" "all"
END
CONNECTIONTYPE PostGIS
CONNECTION “***REMOVED***”
DATA "geom from (
select
round(length::numeric,2) round_el,
* from assessment.rc_parcel_segments_no_overlaps
WHERE parcelid = '%pin%'
OR parcelid = '%qstring%'
) as subquery using unique segid srid=200068"
PROJECTION
"init=epsg:200068"
END
CLASSITEM "parcelid"
LABELITEM "round_el"
VALIDATION
'pin' '^[0-9]{12}$'
'qstring' '^[0-9]{12}$'
END
CLASS
STYLE
GEOMTRANSFORM "start"
SYMBOL "circle"
COLOR 255 0 0
SIZE 12
END
STYLE
GEOMTRANSFORM "end"
SYMBOL "circle"
COLOR 255 0 0
SIZE 12
END # STYLE
LABEL
FORCE true
COLOR 255 0 0
OUTLINECOLOR 255 255 255
FONT "arial-bold"
TYPE truetype
SIZE 12
ANGLE auto
POSITION auto
END
END # CLASS
TEMPLATE 'TEMPLATES/empty.html'
END # LAYER
Thanks
bobb
"Reality is merely an illusion, albeit a very persistent one."
- Albert Einstein
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