[Cartoweb-users] Re: query a row from a layer

[Oliver Christen]

Hi Ben

well, basically one row of data equal one ID, so if you know the id of the data you want, mapserver will display it (as long as your data contains at least one unique ID (key) for each objects/features).
It is the basis of the query plugin, when doing a query by id.

You can also directly do that in the mapfile, with class selector, if you want to have one layer display only one feature.

And lastly, you can do that dynamicaly if needed with the mapOverlay plugin, to change the class selector of a layer.

So it mostly depends of what you want.

regards
Oliver

  ----- Original Message ----- 
  From: bmw at benwyss.com 
  To: oliver.christen at camptocamp.com 
  Cc: cartoweb-users at lists.maptools.org 
  Sent: Thursday, February 14, 2008 6:00 AM
  Subject: query a row from a layer


  Hello Oliver, I have kind of a funny question. I was wondering if there is a way to create a query that will allow me to view only one row of a layer? 
  To give this question some context, lets say that I have a layer containing three rows: Moscow, New York, and Paris, I would like only Moscow to be displayed, is this possible?

  Thank you, and I apologies in advance for such a odd question.

  Ben
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