MATLAB: Am I not able to see the output on the map axes using TEXTM function

axesmframemmaplatlimitmaplonlimitMATLABtextmvisible

I use AXESM to create map axes with specified 'MapLatLimit' and 'MapLonLimit' properties. Next, I use TEXTM to place some text at a location within the given map limits. The text is not visible in the figure. The reproduction steps are:

axesm('pcarree','MapLatLimit',[-20 20],'MapLonLimit',[-20 20]);
textm(-5,-5,'test');

Best Answer

An object is visible in a given axes if it lies within the limits specified by the axes properties XLIM and YLIM. By default, these limits are determined automatically from the extents of the visible non-text objects that are present in the axes.

In the given reproduction example, the text is not visible as it lies outside the default axes limits [0 0 1 1]. The solution is to call FRAMEM function after creating the map axes. If you do not wish the frame to be visible, or would like to delete it, that can be done after resetting the axes XLimMode and YLimMode to 'manual', as following:

axesm('pcarree','MapLatLimit',[-20 20],'MapLonLimit',[-20 20])
h = framem;
set(gca,'XLimMode','manual','YLimMode','manual')
set(h,'Visible','off')
textm(-5,-5,'test');

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MATLAB: Issue creating a map of the USA

You can see an example here.

figure
ax = usamap('all');
set(ax, 'Visible', 'off')
states = shaperead('usastatelo', 'UseGeoCoords', true);
names = {states.Name};
indexHawaii = strcmp('Hawaii',names);
indexAlaska = strcmp('Alaska',names);
indexConus = 1:numel(states);
indexConus(indexHawaii|indexAlaska) = []; 
stateColor = [0.5 1 0.5];

Display the three regions.

geoshow(ax(1), states(indexConus),  'FaceColor', stateColor)
geoshow(ax(2), states(indexAlaska), 'FaceColor', stateColor)
geoshow(ax(3), states(indexHawaii), 'FaceColor', stateColor)

Hide the frame.

for k = 1:3
    setm(ax(k), 'Frame', 'off', 'Grid', 'off',...
      'ParallelLabel', 'off', 'MeridianLabel', 'off')
end

Add labels to each state.

lat = [states(indexConus).LabelLat];
lon = [states(indexConus).LabelLon];
textm(lat, lon, {states(indexConus).Name},'HorizontalAlignment', 'center','Parent',ax(1));
latA = [states(indexAlaska).LabelLat];
lonA = [states(indexAlaska).LabelLon];
textm(latA, lonA, {states(indexAlaska).Name},'HorizontalAlignment', 'center','Parent',ax(2));
latH = [states(indexHawaii).LabelLat];
lonH = [states(indexHawaii).LabelLon];
textm(latH, lonH, {states(indexHawaii).Name},'HorizontalAlignment', 'center','Parent',ax(3));

MATLAB: How to hide the grid lines behind a marker in map axes using GRIDM function in Mapping Toolbox 3.2 (R2010b)

The grid lines appear in front of the marker as the default ‘ZData’ property of grid lines is positive. Set the ‘ZData’ values of grid lines to be negative.

axesm('pcarree','MapLatLimit',[-90 90],'MapLonLimit',[-90 90]);
Hg = gridm;
plotm(0,0,'o','markersize',18,'markerfacecolor','g');
% Get the size of 'Zdata' 
Z1n=size(get(Hg(1),'ZData'));
Z2n=size(get(Hg(2),'ZData'));
% set the  ‘ZData’ values to -1
set(Hg(1),'ZData',-ones(Z1n));
set(Hg(2),'ZData',-ones(Z2n));

Best Answer

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MATLAB: Issue creating a map of the USA

MATLAB: How to hide the grid lines behind a marker in map axes using GRIDM function in Mapping Toolbox 3.2 (R2010b)

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