On Mon, Nov 1, 2010 at 7:39 PM, D Boyd <db...@data-tactics.com> wrote:
> Greetings all:
>      I am pretty new to Mongo and had a question I hope the group can
> help with.

> I have a number of records in the DB now, that I would like to
> transform server side from their
> current structure into a GeoJSON compliant structure.
> Basically, the records are of the form:

> { id: "id1", att1: "att value", att2: "att 2 value", lat: "34.33",
> lon: "22.34" }

> I need to transform that into GeoJSON of the form:

> { "type": "Feature",
>      "geometry": {
>        "type": "Point",
>        "coordinates": [
>          [22.34, 34.33]
>          ]
>        },
>      "properties": {
>        "att1": "att value",
>        "att2": "att 2 value"
>        }
>  }

> In my searches I found a couple of interesting Javascript functions
> (jsonT, jsonPath) at http://goessner.net/articles/JsonPath/

> I have successfully stored them inside my mongo instance and was even
> able from the console to execute jsonPath on a result set.
> However the whole syntax with db.eval is klunky and I have read about
> issues with
> it blocking the database.

> There are several brute force approaches that can be written in
> javascript or java to do the work but
> before I tackled those I thought I would ask the list if there was
> some best practice or more elegant
> approach.

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