How to plot the coastline on a map ?

Hi,

I am trying to plot tasmania coastline on a map. I am trying to plot variable ctt with lonxlat in southern hemisphere.

I have been doing this:

pcolor(lon, lat, ctt);hold on
shading flat 

load coastlines
axesm('eqaconic','MapLatLimit',[-57 -43],'MapLonLimit',[130 160])
plotm(coastlat,coastlon)

However, this is not working. I want to show the coastline with map on top.

Thanks.

[Yuehua Li]

Try 'plot(coastlat,coastlon)' instead of plotm.

Answer 1

[MathWorks Support Team]

To plot the coastlines, the map needs to be created first. This can be done by calling axesm first, and then plotting using pcolorm and geoshow:

load coastlines 
axesm("eqaconic","MapLatLimit",[-57 -43],"MapLonLimit",[130 160]) 
pcolorm(lat,lon,ctt) 
geoshow(coastlat,coastlon) 

Alternatively, the array ‘ctt’ can be plotted using geoshow instead of pcolorm:

geoshow(lat,lon,ctt,"DisplayType","surface") 

[Carlo Grillenzoni]

ok, is it possible to improve the spatial resolution of the Coastlines data base ?