Setting longitude and latitude tick marks on worldmap

I am having trouble setting tick marks on worldmap. The code I am using is below and from Matlab help documentation:

ax = worldmap('World');
setm(ax, 'Origin', [0 180 0])
land = shaperead('landareas', 'UseGeoCoords', true);
geoshow(ax, land, 'FaceColor', [0.5 0.7 0.5])
lakes = shaperead('worldlakes', 'UseGeoCoords', true);
geoshow(lakes, 'FaceColor', 'blue')
rivers = shaperead('worldrivers', 'UseGeoCoords', true);
geoshow(rivers, 'Color', 'blue')
cities = shaperead('worldcities', 'UseGeoCoords', true);
geoshow(cities, 'Marker', '.', 'Color', 'red')

What I would like to do is set the longitudinal numbers every 90o instead of the default of 45 and the latitudinal numbers every 30o?

[Anna S]

Hei,

I think you are searching for

setm(gca,'MLabelLocation',30)

setm(gca,'PLabelLocation',90)

to change the location of the ticks for meridionals, (M) and parallels parallels (P). This chagnes only the ticks, not the lines, they can be placed by using 'MLineLocation'. You can also set a vector of values, if you want to specify those.

all changeable properties can be found here:

https://se.mathworks.com/help/map/ref/axesm-properties.html

BEst, Anna