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  • Geospatial Technology, End to End...

    Exploring all aspects of mapping and geography, from field data collection, to mapping and analysis, to integration, applications development, enterprise architecture and policy
Showing posts with label data mining. Show all posts
Showing posts with label data mining. Show all posts

FGDC Metadata Rant Du Jour

Posted by Dave Smith On 4/23/2007 10:06:00 AM 1 comments

I have been doing some work developing metadata records and automated processes for generating and updating metadata as part of data refresh and ETL processes lately. In the course of doing this, we are trying to develop means of providing very rich and well-documented, FGDC and Agency-profile metadata.

However, when it comes to attributes... Seems FGDC and ESRI both have put some disincentives in the way of capturing attribute data and documenting them painlessly.

http://www.fgdc.gov/metadata/csdgm/05.html

One could take the easy way out, and just put in an overview description and citation, and completely ignore any detailed description of the individual attributes.

Or, one could use ArcCatalog and extract a quick listing of attributes as <attr> elements - but.... ArcCatalog only captures and stores the <attrlabl> elements within this. In the infinite wisdom of the folks at FGDC and the folks that developed MetaParser, they then further require attribute domain <attrdomv> (and in my experience, 99.99% of most attribute data is either never validated against a domain, or validated outside of the GIS system, in the database, data capture or ETL process) and attribute value accuracy description <attrvai><attrvae> which I agree is valuable where applicable, but in many instances is not applicable, such as feature name, FID or other types of fields.

It tends to make providing detailed attribute information a disincentive, and steers folks toward taking the cop-out approach of just providing the overview description. Seems like an opportunity lost.

MetaCarta Public Sector Users Group

Posted by Dave Smith On 4/22/2007 08:28:00 AM 0 comments

MetaCarta will be having their third annual Public Sector Users Group meeting again in Tysons Corner on May 23rd.

Time and circumstances permitting, I am definitely going to try to attend again this year - Last year at their Users Group, we presented MetaCarta technology integrated with EPA mapping capabilities in EnviroMapper, specifically Window to My Environment.

It's always great to see how folks are geo-enabling and spatially mining their assets using technologies like MetaCarta. Last year, they also demonstrated quite a few other interesting emergent things from their labs - some of their innovations, such as OpenLayers and TileCache have been catching on like wildfire.

For details and registration info: http://www.metacarta.com/PublicSectorUG2007/ - and tell John Henry that I said hello...

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