Comments on: WFS Feature paging … yes please http://blog.webmapper.com.au/2007/04/25/wfs-feature-paging-yes-please/ Not another GIS blog Wed, 02 Jun 2010 04:13:39 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: what_nick http://blog.webmapper.com.au/2007/04/25/wfs-feature-paging-yes-please/comment-page-1/#comment-15633 what_nick Thu, 03 May 2007 09:09:51 +0000 http://chris.narx.net/2007/04/25/wfs-feature-paging-yes-please/#comment-15633 Though not a WFS, Flickr Geographic queries employ a similar paging strategy. Though not a WFS, Flickr Geographic queries employ a similar paging strategy.

]]> By: Chris Tweedie http://blog.webmapper.com.au/2007/04/25/wfs-feature-paging-yes-please/comment-page-1/#comment-15449 Chris Tweedie Thu, 26 Apr 2007 01:52:15 +0000 http://chris.narx.net/2007/04/25/wfs-feature-paging-yes-please/#comment-15449 While the resultType=hits may solve the issue of the total number, i still prefer CSW in that it is only a single request/response. With WFS1.1 afaik (correct me if im wrong Chris) ... you need to submit 2 requests, the first to retrieve the number based on your filter, and then submit the actual, "real" request. Conversely, with CSW ... all the useful info is contained in the header. This IMO, is the way it should be done if you are considering revisions ... <code>SearchResults elementSet="summary" recordSchema="csw:Record" numberOfRecordsMatched="43" numberOfRecordsReturned="10" nextRecord="11"</code> While the resultType=hits may solve the issue of the total number, i still prefer CSW in that it is only a single request/response.

With WFS1.1 afaik (correct me if im wrong Chris) … you need to submit 2 requests, the first to retrieve the number based on your filter, and then submit the actual, “real” request.

Conversely, with CSW … all the useful info is contained in the header. This IMO, is the way it should be done if you are considering revisions …

SearchResults elementSet="summary" recordSchema="csw:Record" numberOfRecordsMatched="43" numberOfRecordsReturned="10" nextRecord="11"

]]> By: Chris Holmes http://blog.webmapper.com.au/2007/04/25/wfs-feature-paging-yes-please/comment-page-1/#comment-15433 Chris Holmes Wed, 25 Apr 2007 14:42:54 +0000 http://chris.narx.net/2007/04/25/wfs-feature-paging-yes-please/#comment-15433 In WFS 1.1 you can get the total number of features to be returned by a given query by doing resultType='hits'. As for CSW paging, yes, that's definitely my inspiration. I need to get around to submitting a change request to WFS to adopt the same CSW semantics. I asked the editor of the spec and he wasn't against it. Just need to write up the document. I also want to get CQL in to WFS - we're already using it, and we have it for WMS as well. I need to write up some examples of how it's useful. In WFS 1.1 you can get the total number of features to be returned by a given query by doing resultType=’hits’.

As for CSW paging, yes, that’s definitely my inspiration. I need to get around to submitting a change request to WFS to adopt the same CSW semantics. I asked the editor of the spec and he wasn’t against it. Just need to write up the document. I also want to get CQL in to WFS – we’re already using it, and we have it for WMS as well. I need to write up some examples of how it’s useful.

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