[mapserver-users] Angle Follow will accept only simple linestring don't MultiLinestring ?

[Rahkonen Jukka]

Hi,

What if there happens to be empty/null geometries in your source data? I guess you can add "AND geometry in not NULL" and perhaps even "AND IsValid(geometry)=1" to your DATA line.

-Jukka Rahkonen-

________________________________
Andrea Peri wrote:

> I'm using spatialite 4.1.1,
> so use ogr to access the db.

  LAYER
    NAME "rt_topogr.50k.etichette.topon_idro_50k"
    STATUS OFF
    EXTENT 1554750.74 4678325.52 1771722.76 4924791.90
    TYPE LINE
    CONNECTIONTYPE OGR
    CONNECTION "/path-to-spatialite/zz_topografica.sqlite"
    DATA "select PK_UID_2, TOPO_OK, GEOMETRY from topon_idro_50k"
    PROJECTION
      "+init=epsg:3003 +towgs84=0,0,0,0,0,0,0"
    END
    METADATA
      "wms_title" "topon_idro_50k"
      "wms_extent" "1554750.74 4678325.52 1771722.76 4924791.90"
    END
    LABELCACHE ON
    MAXSCALEDENOM 60100
    MINSCALEDENOM 1
    CLASS
      NAME ''
      MAXSCALEDENOM 60100
      MINSCALEDENOM 1
      LABEL
        TEXT '[TOPO_OK]'
        COLOR 0 85 255
        OUTLINECOLOR 212 255 255
        OUTLINEWIDTH 1
        MAXSCALEDENOM 60100
        MINSCALEDENOM 40100
        FONT "LiberationSans-Regular"
        TYPE truetype
        SIZE 7
        ANGLE FOLLOW
        OFFSET 15 99
        POSITION auto
        PRIORITY 10
        MAXOVERLAPANGLE 180.0
        BUFFER 1
        FORCE OFF
        PARTIALS FALSE
        MINDISTANCE 200
      END
      LABEL
        TEXT '[TOPO_OK]'
        COLOR 0 85 255
        OUTLINECOLOR 212 255 255
        OUTLINEWIDTH 1
        MAXSCALEDENOM 40100
        MINSCALEDENOM 1
        FONT "LiberationSans-Regular"
        TYPE truetype
        SIZE 9
        ANGLE FOLLOW
        OFFSET 15 99
        POSITION auto
        PRIORITY 10
        MAXOVERLAPANGLE 180.0
        BUFFER 1
        FORCE OFF
        PARTIALS FALSE
        MINDISTANCE 200
      END
    END
  END




2013/8/13 thomas bonfort <thomas.bonfort at gmail.com<mailto:thomas.bonfort at gmail.com>>
there's something strange in your error message... the
singleSidedBuffer stuff is in GEOS, and should have nothing to do in
msOGRFileNextShape. post your whole mapfile layer.

On 13 August 2013 17:42, Andrea Peri <aperi2007 at gmail.com<mailto:aperi2007 at gmail.com>> wrote:
> Hi,
>
> I tested trasforming the multilinestring dataset in a linestring dataset but
> the error is still here.
>
> msDrawMap(): Image handling error. Failed to draw layer named
> 'rt_topogr.50k.etichette.topon_idro_50k'.
>
> msOGRFileNextShape(): OGR error. IllegalArgumentException:
> BufferBuilder::bufferLineSingleSided only accept linestrings
>
> So it is not really due to a multilinestring vs linestring question.
>
> The quest carry on.
>
>
>
> 2013/8/13 Andrea Peri <aperi2007 at gmail.com<mailto:aperi2007 at gmail.com>>
>>
>> Hi,
>>
>> Try.ing to set a label on a MULTILINESTRING dataset.
>>
>> I set a label with Follow capability.
>>
>>         ANGLE FOLLOW
>>
>> But I'm having this error:
>>
>>  msOGRFileNextShape(): OGR error. IllegalArgumentException:
>> BufferBuilder::bufferLineSingleSided only accept linestrings
>>
>> Is the Follow compatible with a MultiLinestring dataset or need only
>> simple linestrings ?
>>
>> Thx,
>>
>> --
>> -----------------
>> Andrea Peri
>> . . . . . . . . .
>> qwerty àèìòù
>> -----------------
>
>
>
>
> --
> -----------------
> Andrea Peri
> . . . . . . . . .
> qwerty àèìòù
> -----------------
>
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--
-----------------
Andrea Peri
. . . . . . . . .
qwerty àèìòù
-----------------