Creating Maps Using GEOSHOW (Latitude,Longitude)

This gallery illustrates the range of maps that you can create using geoshow.

Contents

Geographic map 1: World land area

Display world land areas, without a projection.

figure
geoshow('landareas.shp', 'FaceColor', [0.5 1.0 0.5]);

Geographic map 2: North America with custom colored states in the U.S.

Read the USA high resolution data.

states = shaperead('usastatehi', 'UseGeoCoords', true);

Create a SymbolSpec to display Alaska and Hawaii as red polygons.

symbols = makesymbolspec('Polygon', ...
                        {'Name', 'Alaska', 'FaceColor', 'red'}, ...
                        {'Name', 'Hawaii', 'FaceColor', 'red'});

Create a worldmap of North America with Alaska and Hawaii in red, all other states in blue.

figure
worldmap('na');
geoshow(states, 'SymbolSpec', symbols, ...
               'DefaultFaceColor', 'blue', ...
               'DefaultEdgeColor', 'black');
axis off

Geographic map 3: Korea elevation grid

Load the Korean data grid and the land area boundary.

load korea
S = shaperead('landareas','UseGeoCoords',true);

Create a worldmap and display the Korean data grid as a texture map.

figure;
worldmap(map, refvec)
geoshow(gca, map, refvec, 'DisplayType', 'texturemap');
colormap(demcmap(map))
axis off

Overlay the land area boundary as a line.

geoshow([S.Lat], [S.Lon]);

Geographic map 4: EGM96 geoid heights

Load the geoid data.

load geoid

Create an Eckert projection axes and display the geoid as a texture map.

figure
axesm eckert4; framem; gridm;
h = geoshow(geoid, geoidrefvec, 'DisplayType','texturemap');
axis off

Set the Z data to the geoid height values, rather than a surface with zero elevation.

set(h,'ZData',geoid);
light;
material(0.6*[1 1 1]);

set(gca,'dataaspectratio',[1 1 200]);
hcb = colorbar('horiz');
set(get(hcb,'Xlabel'),'String','EGM96 geoid heights in m.')

Mask out all the land.

geoshow('landareas.shp', 'FaceColor', 'black');
zdatam(handlem('patch'), max(geoid(:)));

Geographic map 5: Moon albedo image

Load the moon albedo image.

load moonalb

Display the moon albedo image unprojected.

figure
geoshow(moonalb,moonalbrefvec)

Display the moon albedo image in an orthographic projection.

figure
axesm ortho
geoshow(moonalb, moonalbrefvec)
axis off