How to generate a 2D meshgrid based on the coordinates (longitude and latitude) of points

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Wang Zhen 2022-6-19

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https://ww2.mathworks.cn/matlabcentral/answers/1743515-how-to-generate-a-2d-meshgrid-based-on-the-coordinates-longitude-and-latitude-of-points

评论： Wang Zhen 2022-6-20

I have several points' coordinates, I want to merge a meshgrid of the points looks like the following figure.

For example, I have five points with coordinates info, the ideal generated meshgrid should be like this (the purple square which is overshadowed).

Thank you very much!

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Answer 1

Voss 2022-6-19

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https://ww2.mathworks.cn/matlabcentral/answers/1743515-how-to-generate-a-2d-meshgrid-based-on-the-coordinates-longitude-and-latitude-of-points#answer_988795

在 MATLAB Online 中打开

xy = [1 3; 2 9; 6 6; 8 8; 9 1];

% [xx,yy] = meshgrid(sort(xy(:,1)),sort(xy(:,2))) % note: maybe you want to sort x and y first

[xx,yy] = meshgrid(xy(:,1),xy(:,2))

xx = 5×5

1 2 6 8 9 1 2 6 8 9 1 2 6 8 9 1 2 6 8 9 1 2 6 8 9

yy = 5×5

3 3 3 3 3 9 9 9 9 9 6 6 6 6 6 8 8 8 8 8 1 1 1 1 1

plot(xy(:,1),xy(:,2),'ok','MarkerFaceColor','k')

hold on

xline(xx(1,:))

yline(yy(:,1))

xlim([0 10]);

ylim([0 10]);

set(gca(),'Visible','off')

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Voss 2022-6-19

编辑：Voss 2022-6-19

在 MATLAB Online 中打开

Maybe that error is due to different MATLAB versions, because it runs here:

xy = [

22.7397 113.4884

22.7670 113.5093

22.7704 113.5073

22.7670 113.5083

22.7696 113.5113

22.7712 113.5088

22.7695 113.5128

22.7694 113.5132

22.7680 113.5180

22.7691 113.5203

22.7690 113.5203

22.7693 113.5185

22.7692 113.5185

22.7684 113.5182

22.7704 113.5148

22.7708 113.5113

22.7703 113.5152

22.7712 113.5164

22.7692 113.5161

22.7716 113.5113

22.7727 113.5102

22.7727 113.5103

22.7733 113.5084

22.7730 113.5084

22.7681 113.5157

22.7715 113.5128

22.7746 113.5084

]; % actually yx

[xx,yy] = meshgrid(xy(:,2),xy(:,1))

xx = 31×31

113.4884 113.5093 113.5073 113.5083 113.5083 113.5113 113.5088 113.5088 113.5128 113.5132 113.5180 113.5203 113.5203 113.5203 113.5203 113.5185 113.5185 113.5182 113.5148 113.5113 113.5152 113.5164 113.5161 113.5113 113.5102 113.5103 113.5084 113.5084 113.5157 113.5128 113.4884 113.5093 113.5073 113.5083 113.5083 113.5113 113.5088 113.5088 113.5128 113.5132 113.5180 113.5203 113.5203 113.5203 113.5203 113.5185 113.5185 113.5182 113.5148 113.5113 113.5152 113.5164 113.5161 113.5113 113.5102 113.5103 113.5084 113.5084 113.5157 113.5128 113.4884 113.5093 113.5073 113.5083 113.5083 113.5113 113.5088 113.5088 113.5128 113.5132 113.5180 113.5203 113.5203 113.5203 113.5203 113.5185 113.5185 113.5182 113.5148 113.5113 113.5152 113.5164 113.5161 113.5113 113.5102 113.5103 113.5084 113.5084 113.5157 113.5128 113.4884 113.5093 113.5073 113.5083 113.5083 113.5113 113.5088 113.5088 113.5128 113.5132 113.5180 113.5203 113.5203 113.5203 113.5203 113.5185 113.5185 113.5182 113.5148 113.5113 113.5152 113.5164 113.5161 113.5113 113.5102 113.5103 113.5084 113.5084 113.5157 113.5128 113.4884 113.5093 113.5073 113.5083 113.5083 113.5113 113.5088 113.5088 113.5128 113.5132 113.5180 113.5203 113.5203 113.5203 113.5203 113.5185 113.5185 113.5182 113.5148 113.5113 113.5152 113.5164 113.5161 113.5113 113.5102 113.5103 113.5084 113.5084 113.5157 113.5128 113.4884 113.5093 113.5073 113.5083 113.5083 113.5113 113.5088 113.5088 113.5128 113.5132 113.5180 113.5203 113.5203 113.5203 113.5203 113.5185 113.5185 113.5182 113.5148 113.5113 113.5152 113.5164 113.5161 113.5113 113.5102 113.5103 113.5084 113.5084 113.5157 113.5128 113.4884 113.5093 113.5073 113.5083 113.5083 113.5113 113.5088 113.5088 113.5128 113.5132 113.5180 113.5203 113.5203 113.5203 113.5203 113.5185 113.5185 113.5182 113.5148 113.5113 113.5152 113.5164 113.5161 113.5113 113.5102 113.5103 113.5084 113.5084 113.5157 113.5128 113.4884 113.5093 113.5073 113.5083 113.5083 113.5113 113.5088 113.5088 113.5128 113.5132 113.5180 113.5203 113.5203 113.5203 113.5203 113.5185 113.5185 113.5182 113.5148 113.5113 113.5152 113.5164 113.5161 113.5113 113.5102 113.5103 113.5084 113.5084 113.5157 113.5128 113.4884 113.5093 113.5073 113.5083 113.5083 113.5113 113.5088 113.5088 113.5128 113.5132 113.5180 113.5203 113.5203 113.5203 113.5203 113.5185 113.5185 113.5182 113.5148 113.5113 113.5152 113.5164 113.5161 113.5113 113.5102 113.5103 113.5084 113.5084 113.5157 113.5128 113.4884 113.5093 113.5073 113.5083 113.5083 113.5113 113.5088 113.5088 113.5128 113.5132 113.5180 113.5203 113.5203 113.5203 113.5203 113.5185 113.5185 113.5182 113.5148 113.5113 113.5152 113.5164 113.5161 113.5113 113.5102 113.5103 113.5084 113.5084 113.5157 113.5128

yy = 31×31

22.7397 22.7397 22.7397 22.7397 22.7397 22.7397 22.7397 22.7397 22.7397 22.7397 22.7397 22.7397 22.7397 22.7397 22.7397 22.7397 22.7397 22.7397 22.7397 22.7397 22.7397 22.7397 22.7397 22.7397 22.7397 22.7397 22.7397 22.7397 22.7397 22.7397 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7704 22.7704 22.7704 22.7704 22.7704 22.7704 22.7704 22.7704 22.7704 22.7704 22.7704 22.7704 22.7704 22.7704 22.7704 22.7704 22.7704 22.7704 22.7704 22.7704 22.7704 22.7704 22.7704 22.7704 22.7704 22.7704 22.7704 22.7704 22.7704 22.7704 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7670 22.7696 22.7696 22.7696 22.7696 22.7696 22.7696 22.7696 22.7696 22.7696 22.7696 22.7696 22.7696 22.7696 22.7696 22.7696 22.7696 22.7696 22.7696 22.7696 22.7696 22.7696 22.7696 22.7696 22.7696 22.7696 22.7696 22.7696 22.7696 22.7696 22.7696 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7712 22.7695 22.7695 22.7695 22.7695 22.7695 22.7695 22.7695 22.7695 22.7695 22.7695 22.7695 22.7695 22.7695 22.7695 22.7695 22.7695 22.7695 22.7695 22.7695 22.7695 22.7695 22.7695 22.7695 22.7695 22.7695 22.7695 22.7695 22.7695 22.7695 22.7695 22.7694 22.7694 22.7694 22.7694 22.7694 22.7694 22.7694 22.7694 22.7694 22.7694 22.7694 22.7694 22.7694 22.7694 22.7694 22.7694 22.7694 22.7694 22.7694 22.7694 22.7694 22.7694 22.7694 22.7694 22.7694 22.7694 22.7694 22.7694 22.7694 22.7694

plot(xy(:,2),xy(:,1),'ok','MarkerFaceColor','k')

hold on

xline(xx(1,:))

yline(yy(:,1))

If you really need to plot the grid lines, there are different ways. Easiest might be to use a couple of loops:

figure

plot(xy(:,2),xy(:,1),'ok','MarkerFaceColor','k')

hold on

for ii = 1:size(xx,2)

xline(xx(1,ii));

end

for ii = 1:size(yy,1)

yline(yy(ii,1));

end

Voss 2022-6-19

You're welcome!

Wang Zhen 2022-6-20

https://www.mathworks.com/matlabcentral/answers/1743855-how-to-calculate-the-l2-euclidean-and-l1-cityblock-or-we-say-manhattan-distance-distance-based?s_tid=srchtitle

Hi, here is another problem I encountered which is associated with this, please take a look if you are free.

Thank you very much!

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How to generate a 2D meshgrid based on the coordinates (longitude and latitude) of points

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How to generate a 2D meshgrid based on the coordinates (longitude and latitude) of points

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