[mapserver-users] howto draw amount of points features of one layer depending on scale

[Nils Zierath]

Hi David,
your suggestion is similar to Jeff's?
How would I treat a point as lable? I haven't had any luck in displaying the points 
with "TYPE ANNOTATION".

What would the syntax in the mapfile would look like to either treat a point as lable 
or with "TYPE ANNOTATION"?

My mapfile currently looks like:

LAYER
  NAME	'Field research locations'
  DATA	'../vector/gps/fieldresearch_complete'
  STATUS	default
  TYPE	point
  #TYPE	annotation
  TRANSPARENCY	100
  TOLERANCE	7
  TOLERANCEUNITS	pixels
  UNITS	kilometers

  METADATA
  ...
  END #METADATA

  PROJECTION
  ...
  END #PROJECTION

  CLASSITEM	'StudyFocus'
  #LABELITEM	'LableAnnot'

  CLASS
   NAME	'Research locations (all)'
   #MINSCALEDENOM	1000000

   STYLE
    SYMBOL 'ttf_pin-sm'
    SIZE 10
    COLOR 255 180 0
    ANGLE 345
   END #STYLE
  END #CLASS
END #LAYER



David Percy schrieb:
> If you treated them as labels when zoomed out (maxscale 50000 for 
> example), then you could take advantage of the label colission features 
> of mapserver to avoid overlaps.
> 
> when zoomed in further you could have another layer (minscale 50000 for 
> example) that shows all the detail...
> 
> so you would have two layer definitions in this case...
> Cheers,
> Percy
> 
> 
> Nils Zierath wrote:
>> Dear list,
>> I got a layer with gps points. On the largest scale of my map the 
>> symbols for points overlap and are not distinguishable from one 
>> another since they are too close together.
>>
>> Is it possible to tell mapserver to draw only that many of the 
>> points/symbols that do not overlap, so that more points will be shown 
>> the more I zoom into the map?
>>
>> Thank you,
>> Nils
>>
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>