MATLAB: Label Polygons in Mapshow

geoshowlabel;mapshowMATLAB

I have a shapefile of zip codes of NYC. When I use the code, I get this pic and a structure is created, where zip codes are listed in column 5 of the structure. How can I label these zip codes on the map, where it shows?

Thanks,

Candace

%S = shaperead('ZipCode1.shp','UseGeoCoords',true);
S = shaperead('ZipCode1.shp')
mapshow(S)

Best Answer

You may find internal point of bounding boxes and use text function.

for i=1:263
meanValue = mean(S(i).BoundingBox);
text(meanValue(1),meanValue(2),num2str(S(i).ZIPCODE))
end

Related Solutions

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: Heat (or color coded Map) in Matlab

In my opinion, the easiest way to do this is to alter the colors of the patches after plotting with mapshow/geoshow. An example:

S = shaperead('usastatelo');
h = mapshow(S);
set(h.Children, {'CData'}, {S.PopDens2000}'); % Add single cdata value to each based on property
set(h.Children, 'facecolor', 'flat'); % And link to the colormap
set(gca, 'clim', [5 500]);

An alternative would be to take a look at the makesymbolspec function, and the 'SymbolSpec' option for mapshow. But I find that option horribly unintuitive, inflexible, and a little buggy.

Best Answer

Related Solutions

MATLAB: Issue creating a map of the USA

MATLAB: Heat (or color coded Map) in Matlab

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