function out = usalo(request) % USALO returns data from the USALO atlas data file % % USALO types a list of requests for the USALO Mat-file to the screen. % % s = USASLO('request') returns the requested data. Valid requests for two % column vectors are 'conusvec', 'statebvec' and 'gtlakevec'. Valid % requests for geographic data structures are 'conus', 'state', % 'stateborder' and 'greatlakes'. This command can be used as an argument % to other commands, such as DISPLAYM(USALO('conus')). % % See also COAST, WORLDLO, USAHI, USALO.MAT % Copyright 1996-1998 by Systems Planning and Analysis, Inc. and The MathWorks, Inc. % $Revision: 1.3 $ $Date: 1998/09/01 18:34:16 $ if nargin == 0 disp('USALO atlas data:') disp(' ') disp(' Vector data: Two-column vectors of lat and long') disp(' ') disp(' conusvec - Conterminous United States outline') disp(' statebvec - Borders between states') disp(' gtlakevec - Great Lakes outlines') disp(' ') disp(' Geographic Data Structures: ') disp(' ') disp(' conus - Conterminous United States outline') disp(' state - State outlines') disp(' stateborder - Borders between states') disp(' greatlakes - Great Lakes outlines') disp(' ') return end switch request case 'conusvec' load('usalo','uslat') load('usalo','uslon') out = [uslat uslon]; case 'statebvec' load('usalo','statelat') load('usalo','statelon') out = [statelat statelon]; case 'gtlakevec' load('usalo','gtlakelat') load('usalo','gtlakelon') out = [gtlakelat gtlakelon]; otherwise load('usalo',request) if exist(request) ~= 1 error([ request ' not found in USALO.MAT']) end eval(['out = ' request ';']) end