Michael: >I need to be able to count population within a user-defined polygon by >census block centroids. This apparently is the preferred way by the >FCC. IE: if an polygon-area does not include the centroid, any >remaining portion of that block that might be inside the polygon is >assumed to have zero population. Conversely, if the centroid is >inside the polygon, the entire block is counted, even if a portion of >it is outside the polygon. Is this possible to do with Maptitude's >census block data, and/or are there other sources of importable >population data that use block centroids? Demographic data is >unnecessary - just total head counts.....
You can select and export as centroids just the blocks in your study area; export from the dataview, where you have hidden all the unnecessary fields, for a smaller resulting file. Then use that file for your analysis. Peter ---------------------------------------------------------------- Peter H. Van Demark Director of GIS Products and Training Phone: 617-527-4700 Caliper Corporation Fax: 617-527-5113 1172 Beacon Street E-mail: [EMAIL PROTECTED] Newton MA 02461-9926 Web site: http://www.caliper.com ------------------------ Yahoo! Groups Sponsor --------------------~--> Get fast access to your favorite Yahoo! Groups. Make Yahoo! your home page http://us.click.yahoo.com/dpRU5A/wUILAA/yQLSAA/C5grlB/TM --------------------------------------------------------------------~-> Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Maptitude/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
