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| GeoCommunity Mailing List |
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| Subject: | Re: [gislist] Data vailidation |
| Date: |
03/04/2006 06:05:01 PM |
| From: |
Chris Holmes |
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If you can do it on the server-side, then GeoServer
(http://geoserver.org) has a pretty sofisticated validation engine
that can do just the sorts of checks that you're looking for. Server
side could make sense, and GeoServer will plug on top of ArcSDE or
Oracle. The feature isn't well documented, but is quite powerful,
with a plug-in architecture making it easy to add more validations
(though most of the ones you're asking for already exist). And
actually, if it had to be desktop uDig (http://udig.refractions.net),
has integrated the same validation engine that GeoServer uses, in
their 1.1 releases. Both are open source, so if there's functionality
that you're needing it's easy to find a developer to add in the
functionality. The scoring might be an additional functionality
needed, as I think the checks are now binary. But a plug-in that
takes other plug-ins and scores them could likely fit the bill
perfectly.
best regards,
Chris
On 3/2/06, Craig von Hagen <craigvonhagen@yahoo.co.uk> wrote:
> Dear All,
>
>
>
> We are working on a water sources database and we would like to build in an
> automatic procedure for validation of new data coming in. We would like to
> check if new data being entered is a duplicate water point or not. We would
> then like to come up with a 'score' - (0 = the water source is not a
> duplicate, with higher numbers having more chance of being a duplicate water
> source). Then we will investigate the points with a high score and go back
> to the source to verify it.
>
>
>
> Some of the checks we would like to do are:
>
>
>
> Check if the input district name matches the district in the database
>
> Check If water points are within 1km, 500m, 300m and 100m of each other ( >
> than 1km = 1 score: within 100m = 4 score for example)
>
> Check if certain attributes in the database match or are within a certain
> range:
>
> If the pump number of different water sources are the same then
> chances are they might be a duplication - assign a score of 2)
>
> If the water depths are the same or within a few metres of each
> other, chances are they are duplicates - assign a score of say 3)
>
>
>
> At the end we will add the scores and only verify those with high scores
> (high probability of being a duplicate).
>
> I can do these checks manually but of course it would take time as we have
> thousands of records. I have no programming skills but I could detail the
> specs quite easily and then provide that to a developer.
>
> Ideally we would like the check to be done in ArcGIS with the press of a
> button, but we are open to other suggestions
>
>
>
> Before we begin, I thought I'd send a message to find out if others have
> done something similar.
>
>
>
> Looking forward to the responses.
>
>
>
> Regards,
>
> Craig
>
>
>
>
>
> Craig von Hagen
>
> FAO-SWALIM/GLCN/Africover Projects
>
> Tel: +254 20 4443331
>
> Fax: +254 20 4441993
>
> www.faoswalim.org: www.africover.org:
>
> www.glcn.org: www.glcn-lccs.org
>
>
>
>
>
>
>
>
>
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