MATLAB: Cannot overlay country/state/district borders from shapefile without blocking data

contourfmgisMapping Toolboxshapefile

Hi,

I'm trying to overlay district borders of India over a contourfm image. As of now when I bring in the shapefile the ploygons cover the contoured image so I cannot see the rainfall data.

contourfm(lats,lons,TOTrain)
borders = shaperead('Shapefiles/IND_adm2.shp', 'UseGeoCoords', true);
geoshow(borders);

Any help would be appreciated, Ryan

Best Answer

If you just want the outline of the polygons in the shapefile, try:

geoshow(borders, 'facecolor', 'none');

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MATLAB: How can we find the non common strings from multiple columns

First lets find the strings that are common to all cell arrays:

listA={'India','Iran','Ireland','Israel','Jordan','Kuwait','Lebanon','Lesotho','Libya','Luxembourg','Malawi','Maldives','Morocco','Nepal','Netherlands','Norway','Oman','Paraguay','Peru','Philippines',};
listB={'Denmark','El Salvador','Gabon','Gambia','Lebanon','Lesotho','Libya','Luxembourg','Malawi','Maldives','Morocco','Nepal','Netherlands','Norway','Oman','Paraguay','Peru','Philippines','Qatar','Rwanda','Saudi Arabia','Senegal','Singapore','Sudan'};
listC={'Kuwait','Lebanon','Lesotho','Nepal','Netherlands','Oman','Sweden','Syria','Tanzania','Turkey','Uruguay'};
%

lists = {listA,listB,listC}; % storing data together makes working with them much simpler.
%
exc = lists{1};
for k = 2:numel(lists)
    exc = intersect(exc,lists{k});
end

giving the strings found in all cell arrays as:

 exc =
    'Lebanon'
    'Lesotho'
    'Nepal'
    'Netherlands'
    'Oman'

Now we can easily get the input cell arrays with the strings from exc removed:

out = cell(size(lists));
for k = 1:numel(lists)
    out{k} = setdiff(lists{k},exc);
end

giving:

>> out{:}
ans = 
    'India' 'Iran' 'Ireland' 'Israel' 'Jordan' 'Kuwait' 'Libya' 'Luxembourg' 'Malawi' 'Maldives' 'Morocco' 'Norway' 'Paraguay' 'Peru' 'Philippines'
ans =
    'Denmark' 'El Salvador' 'Gabon' 'Gambia' 'Libya' 'Luxembourg' 'Malawi' 'Maldives' 'Morocco' 'Norway' 'Paraguay' 'Peru' 'Philippines' 'Qatar' 'Rwanda' 'Saudi Arabia' 'Senegal' 'Singapore' 'Sudan'
ans =
    'Kuwait' 'Sweden' 'Syria' 'Tanzania' 'Turkey' 'Uruguay'

And if you want a list of all strings together, excluding those in exc:

uni = {};
for k = 1:numel(lists)
    uni = union(uni,lists{k});
end
uni = setdiff(uni,exc)

gives:

uni =
    'Denmark' 'El Salvador' 'Gabon' 'Gambia' 'India' 'Iran' 'Ireland' 'Israel' 'Jordan' 'Kuwait' 'Libya' 'Luxembourg' 'Malawi' 'Maldives' 'Morocco' 'Norway' 'Paraguay' 'Peru' 'Philippines' 'Qatar' 'Rwanda' 'Saudi Arabia' 'Senegal' 'Singapore' 'Sudan' 'Sweden' 'Syria' 'Tanzania' 'Turkey' 'Uruguay'

MATLAB: How to set usamap projection to mercator

Hello Leon,

Once you use geoshow to place shapes onto the map, you cannot change the map projection. You could delete all the children, change the projection, and then reuse geoshow. But an easier way is to just set the map projection at the outset:

ax = usamap([10 90], [-180 -50] );
states = geoshape(shaperead('usastatehi', 'UseGeoCoords', true));
oceanColor = [.5 .7 .9];
setm(ax, 'FFaceColor', oceanColor)
setm(ax,'MapProjection','mercator')  % ADDED LINE
geoshow(states)
gridm off;

-Cam

Best Answer

Related Solutions

MATLAB: How can we find the non common strings from multiple columns

MATLAB: How to set usamap projection to mercator

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