This message was forwarded to Maps-l by Larry Cruse.--------Johnnie
 
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>All,      ##### DO NOT USE REPLY FUNCTION #####
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>It's been a long time coming, but here we are.
>Proof of concept. Data users read the files
>"griddoc.txt" & "gridlgd.txt".
>Brief summary below.
>
>URL (or just ftp ftp.ciesin.org. cd /pub/census/usa/grid)
>
>ftp://www.ciesin.org/pub/census/usa/grid/pall/gif
>
>Enjoy!
>-Henk (sorry for crossposts)
>
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>Within this framework, the "Population, Land Use and Emissions" Task
>(PLUE) embarked on integrating data from different sources.
>Specifically, data from the US decennial census (1990) and recent
>satelitte data were integrated. In the initial attempt, the focus is on
>transforming census vector based data to satelitte pixel based data.
>>From the US census data Total Persons and Total Housing Unit Structures
>were the selected data items (from the blockgroup geography) to be
>merged with the Land Cover Characteristics database (square kilometer
>resolution) for the conterminous United States from the EROS Data
>Center.  This land cover was derived from Advanced Very High Resolution
>Radiometer (AVHRR) 1990 multitemporal satelitte data.
>