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

[Yewondwossen Assefa]

Nils,

look at this thread: it gives details of what you want to accomplish 
with an example of a working layer:

http://www.mail-archive.com/mapserver-users@lists.osgeo.org/msg00164.html

Best Regards,

Nils Zierath wrote:
> 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
>>>
>>> _______________________________________________
>>> mapserver-users mailing list
>>> mapserver-users at lists.osgeo.org
>>> http://lists.osgeo.org/mailman/listinfo/mapserver-users
>>>
>>
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> 


-- 
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Assefa Yewondwossen
Software Analyst

Email: assefa at dmsolutions.ca
http://www.dmsolutions.ca/

Phone: (613) 565-5056 (ext 14)
Fax:   (613) 565-0925
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