Thank Larry for your suggestions. I'm dealing with ~50K features and each feature has about 10-20 attributes, some of which can be a lot longer than a simple name. Nonetheless I would not call the dataset big. I'm using an in-memory and in process Lucene index storage for the attributes. It takes about 10 seconds to index them and it takes about 10-20M of memory.
To display the result in a tabular form is straightforward. But I need to show them on map because I'm searching for roads with specific names and am looking for the road intersections. It's almost working Bing From: Larry Becker Sent: Tuesday, December 30, 2008 11:13 PM To: OpenJump develop and use Subject: Re: [JPP-Devel] Search tool for Attributes Hi Bing, Wow! That was an information-rich post. Using Lucene goes way beyond my usual minimalist approach to feature implementation. You must have some use cases with a lot of attribute data. So far, I haven't seen the need for indexing in my own work, and I would hate to pay the memory/time price for a tool that I would use only occasionally. Supporting the Editable and Selectable layer settings in plugins is a judgment call. Generally, I try to support them, but for some tools it makes sense to ignore the setting. In the case of a search tool, I would think the Selectable setting should be honored. This would be useful, for instance, when you have temporary duplicate layers that you wish to exclude from the search. I like the approach Michael took in the Simple Query plugin. Results can be displayed in the Feature Info table if selection is impractical. Also, I think that just because something is hidden due to a scale range, it shouldn't be exempt from selection. I'm not sure what happens with the selection handles though. thanks, Larry On Tue, Dec 30, 2008 at 12:24 AM, Bing Ran <bing_...@hotmail.com> wrote: Hi, Larry, I have implemented a Lucene based global attribute search for my application. Features are indexed when they loaded on the layers. Search results are selected and zoomed-to on the map. What is tricky is that the result map needs a strategy to deal with features that are labeled as hidden in a scale range and also those layers that are tagged as NOT selectable. I'm wondering if I need to make a discrimination between a manually selectable layer and a programmatically selectable layer. Bing From: Larry Becker Sent: Tuesday, December 30, 2008 4:12 AM To: OpenJump develop and use Subject: [JPP-Devel] Search tool for Attributes Question: You can use Simple Query to search Attribute fields for specific values, but have you ever wanted to do a Google style search in a map? In other words, search all attributes in all layers for any occurrence of one or more target words. I have a tool that could be morphed into this capability fairly easily, or it could be added to Simple Query. Any comments? regards, Larry -- http://amusingprogrammer.blogspot.com/ ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ _______________________________________________ Jump-pilot-devel mailing list Jump-pilot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel ------------------------------------------------------------------------------ _______________________________________________ Jump-pilot-devel mailing list Jump-pilot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel -- http://amusingprogrammer.blogspot.com/ -------------------------------------------------------------------------------- ------------------------------------------------------------------------------ -------------------------------------------------------------------------------- _______________________________________________ Jump-pilot-devel mailing list Jump-pilot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel
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