This message was forwarded to Maps-l by Larry Cruse.--------Johnnie ----------------------------Original message---------------------------- > > >All, ##### DO NOT USE REPLY FUNCTION ##### > >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) > >------------------------------------------------------------------------- >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. >