How to use the land_detail scripts
Below is an annotated version of the script land_detail_demo.jnl
Description: demonstrate detailed land data in the dataset geo_borders_intermed.nc
land_detail.jnl and mp_land_detail.jnl can plot or overlay continent, national, and state boundaries, and also major and secondary rivers and international marine boundaries. Their arguments are as follows:
! arg1 continent_pen ! arg2 "basemap" "overlay", or omitted for overlay ! arg3 country_pen Pen for optional national boundaries ! arg4 state_pen Pen for optional state boundaries (Western hemisphere) ! arg5 rivers_pen Pen for largest rivers ! arg6 more_rivers Pen for additional rivers ! arg7 marine boundaries Pen for marine boundaries in South Pacific, Bering Strait
The pen specifications can be color names, which are drawn with thin lines, or color numbers which can include a thickness specification. See "PEN" in the Ferret Users Guide.
! U.S. State boundaries are available in the North and South ! America. Here we use pen-color codes 8 and 9 for national ! and state boundaries in red and green, so that the rivers ! show up on top of the national or state boundary lines. yes? go fland 40 white basemap solid x=232:295 y=24:50 ! A blank plot to overlay upon yes? go land_detail black overlay 8 9 blue lightblue
Now show one with national boundaries and rivers. Access the detailed topography/bathymetry data from Smith and Sandwell via DODS.
yes? use "http://ferret.pmel.noaa.gov/cgi-bin/nph-dods/data/PMEL/smith_sandwell_topo_v8_2.nc" yes? fill/lev=(-5000,-1000,500)(-1000,0,50)/pal=topo/x=0:24/y=30:46 rose yes? go land_detail black overlay red " " blue blue
Now show the interntional marine boundaries.
yes? use etopo20 yes? fill/x=80:220/y=-50:20/pal=land_sea/lev=(-9000,9000,500) rose ! Show continental, national and international marine boundaries yes? go land_detail black overlay red " " " " " " red
firstname.lastname@example.org 19 April 2004