;+ ; PROCEDURE/FUNCTION sd_latlt_grid ; ; :DESCRIPTION: ; Draw the latitude-longitude mesh with given intervals in Lat and LT. ; ; :KEYWORDS: ; dlat: interval in Latitude [deg]. If not set, 10 deg is used as default. ; dlt: interval in local time [hr]. If not set, 1 hour is used as default. ; ; :EXAMPLES: ; sd_map_set, /nogrid ;sd_map_set automatically calls sd_latlt_grid unless nogrid keyword is set. ; sd_latlt_grid, dlat=10., dlt=2. ; ; :AUTHOR: ; Tomo Hori (E-mail: horit@stelab.nagoya-u.ac.jp) ; ; :HISTORY: ; 2011/01/11: Created ; ; $LastChangedBy: jwl $ ; $LastChangedDate: 2014-02-10 16:54:11 -0800 (Mon, 10 Feb 2014) $ ; $LastChangedRevision: 14265 $ ; $URL: svn+ssh://thmsvn@ambrosia.ssl.berkeley.edu/repos/spdsoft/trunk/projects/erg/ground/radar/superdarn/sd_latlt_grid.pro $ ;- PRO sd_latlt_grid, dlat=dlat, dlt=dlt ;Initialize the SD plot environment sd_init if ~keyword_set(dlat) then dlat = 10. if ~keyword_set(dlt) then dlt = 1. map_grid, latdel=dlat, londel=15.*dlt RETURN END