Plotting spatial data in a global map

2015 1 28
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更新时间：2015 1 28
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Hello,
I have a dataset of 555x3 Lat, Lon, and Biomass
The latitude and longitude are not evenly spaced and random
I would like to know how I can visualize on a map where the data falls on a global map with continents outlined. I don't want to see the value of the biomass, rather I would like to just see where on a global map I have data at in order to visualize the spatial expanse of my dataset.
I'm having trouble finding a matlab command that can easily accomplish this. Does anyone know what command meets my needs?
Thank you

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Chad Greene
Chad Greene 2015-1-28

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We'll call your data matrix data. Then
lat = data(:,1);
lon = data(:,2);
plot(lon,lat,'bp')
xlabel('longitude')
ylabel('latitude')
will put a blue star at every data point.

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Melissa
Melissa 2015-1-28
Thank you Chad,
Is there a way that I could see it spread out across a global map with continents?
Chad Greene
Chad Greene 2015-1-28
Do you have the Mapping Toolbox? If yes, use worldmap to initialize a map, choose your method of plotting a coast, then use plotm(lat,lon,'bp') to plot blue stars at all your data points. If you do not have the mapping toolbox, M_Map works just as well.

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