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Reply-To: solr-user@lucene.apache.org
Subject: Re: heatmaps
To: solr-user@lucene.apache.org
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From: Joseph Obernberger <joeo@lovehorsepower.com>
Message-ID: <5595B68C.4020201@lovehorsepower.com>
Date: Thu, 2 Jul 2015 18:09:16 -0400
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Hi - perhaps you do not have enough geospatial data in your index to 
generate a larger image?  Try setting the facet.heatpmap.gridLevel to 
something higher like 4.
I've run queries like:
q=insert whatever 
here&wt=json&indent=true&facet=true&facet.heatmap=geo&facet.heatmap.gridLevel=4&facet.heatmap.format=ints2D&rows=0&facet.heatmap.maxCells=35554432

I'm not familiar with the notation you have 
facet.heatmap=store_geohash.  What is that?

I'm very interested in working with heatmaps and have tried integrating 
the results from Solr with GeoTools.  I have access to a very sizable 
index with geospatial content in it, and I've been able to generate 
images like this:
http://lovehorsepower.com/images/Solr/AllDataSinceJan01_2015_Map.jpg
The above is a 1024x1024 raster.

Doing a geospatial filter query around the UK results in an image like this:
http://lovehorsepower.com/images/Solr/TwitterDataOneDayUKGeoSearchMap.jpg

I would love to be able to apply some heatmap visualization to this.  
Anyone have any ideas on what tools to use?

Thank you.

-Joe


On 6/13/2015 4:29 PM, William Bell wrote:
> OK. I was able to get a PNG - but it looks tiny and a blob. Not sure how to
> use it.
>
> echo iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAYAAABzenr0AAAA0UlEQVR42mNg
> YGD4P8B41AEwBuNAOoD7PwMbP5BmGygHyP9nENf5z8C45D8Dk+ZAp4FNA+
> wA5pn/GZfz/GeQzv3PkL3hP4Pw+f8MLGuBctl0cgCv1n+Gton/GSUs/jPGL/jP+
> uvCf467IAdMoFcUyPxnaS78zzCN6T+TKMt/5g+T/jNJraZzOXBc6T/D9bv/
> mfp//2f8GDqABZFCzX/GQh86OED1338Grm34FVrMoEcITKdDt
> msZrYxGHTDqAFIdwDgaBaMOGHXAqANGHTC8HQAAQf8YdbR5KkIAAAAASUVORK5CYII= |
> base64 --decode > test.png
>
> Very strange.
>
> Maybe I need to zoom in?
>
>
>
> On Sat, Jun 13, 2015 at 2:18 PM, William Bell <billnbell@gmail.com> wrote:
>
>> How do you use the heatmaps feature to show the PNG or use the int2D to
>> show the heatmap easily just for testing?
>>
>>
>> http://localhost:8983/solr/select?q=*%3A*&wt=json&rows=0&indent=true&facet=true&facet.heatmap=store_geohash&facet.heatmap.format=png
>>
>> {
>>
>>     - responseHeader:
>>     {
>>        - status: 0,
>>        - QTime: 163,
>>        - params:
>>        {
>>           - facet.heatmap.format: "png",
>>           - q: "*:*",
>>           - facet.heatmap: "store_geohash",
>>           - indent: "true",
>>           - rows: "0",
>>           - wt: "json",
>>           - facet: "true"
>>           }
>>        },
>>     - response:
>>     {
>>        - numFound: 2664396,
>>        - start: 0,
>>        - docs: [ ]
>>        },
>>     - facet_counts:
>>     {
>>        - facet_queries: { },
>>        - facet_fields: { },
>>        - facet_dates: { },
>>        - facet_ranges: { },
>>        - facet_intervals: { },
>>        - facet_heatmaps:
>>        {
>>           - store_geohash:
>>           [
>>              - "gridLevel",
>>              - 2,
>>              - "columns",
>>              - 32,
>>              - "rows",
>>              - 32,
>>              - "minX",
>>              - -180,
>>              - "maxX",
>>              - 180,
>>              - "minY",
>>              - -90,
>>              - "maxY",
>>              - 90,
>>              - "counts_png",
>>              -
>>              "iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAYAAABzenr0AAAA0UlEQVR42mNgYGD4P8B41AEwBuNAOoD7PwMbP5BmGygHyP9nENf5z8C45D8Dk+ZAp4FNA+wA5pn/GZfz/GeQzv3PkL3hP4Pw+f8MLGuBctl0cgCv1n+Gton/GSUs/jPGL/jP+uvCf467IAdMoFcUyPxnaS78zzCN6T+TKMt/5g+T/jNJraZzOXBc6T/D9bv/mfp//2f8GDqABZFCzX/GQh86OED1338Grm34FVrMoEcITKdDtmsZrYxGHTDqAFIdwDgaBaMOGHXAqANGHTC8HQAAQf8YdbR5KkIAAAAASUVORK5CYII="
>>              ]
>>           }
>>        }
>>
>> }
>>
>> --
>> Bill Bell
>> billnbell@gmail.com
>> cell 720-256-8076
>>
>
>