2009/8/23 Itzchak Raiskin <[email protected]>: > Hi > I want to use SQLite in a GIS application where I create a database > containing terrain data (coordinates, height). > I would like to query this database with start and end points of a line and > get a vector with all heights point along this line. > I can, of course create a query for each point along the line, but this will > be very time consuming as I have hundreds of lines with hundreds of points. > Any suggestions? > Thanks, Itzik
SELECT x,y,height FROM terrain WHERE round(a*x+b*y+c)=0 AND x BETWEEN xmin AND xmax AND y BETWEEN ymin AND ymax; -- Kit _______________________________________________ sqlite-users mailing list [email protected] http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
