plot3ddem#

plot3ddem(x, y, z, plottype, cmapcolors)

Description#

Plot x (longitude), y (latitude) and z (elevation) data into a defined mesh

Inputs#

x
x (longitude) data extracted from xyz file
Set x=[] if it is not available
It may be 1d or 2d array
y
y (latitude) data extracted from xyz file
Set y=[] if it is not available
It may be 1d or 2d array
z

z (elevation) data extracted from xyz file

plottype=’imagesc’;
Plot type
‘imagesc’: 2 dimensional plot using imagesc or imshow
‘pcolor’: 2 dimensional plot using pcolor
‘contour’: 2 dimensional contour plot, number of contour=ncolor
‘surface’: 3 dimensional surface plot
cmapcolors=’topocmap’;
Colormap for z data
Topographic (Water/Land) colormaps:
‘topocmap’: colormap developed by Arash Karimpour
‘topocmaprelief’: colormap developed by Arash Karimpour
‘topocmapocean’: colormap developed by Arash Karimpour
‘topocmapearth’: colormap developed by Arash Karimpour
‘blueocean’: colormap developed by Arash Karimpour
‘blueoceansea’: colormap developed by Arash Karimpour
‘greenearth’: colormap developed by Arash Karimpour
‘greenearthland’: colormap developed by Arash Karimpour
‘blgrtopocmap’: colormap developed by Arash Karimpour
‘blrdtopocmap’: colormap developed by Arash Karimpour
‘grayearth’: colormap developed by Arash Karimpour
‘etopo1’: ETOPO1 colormap, https://www.ngdc.noaa.gov/mgg/global/global.html
‘gmtglobe’: GMT_globe colormap, https://www.giss.nasa.gov/tools/panoply/colorbars/
‘gmtrelief’: GMT_relief colormap, https://www.giss.nasa.gov/tools/panoply/colorbars/
‘aendekerk’: Colormap from Florian Aendekerk, http://www.mathworks.com/matlabcentral/fileexchange/63590-landseacolormap-m-
Any other available color map such as ‘cool’, ‘winter’, etc can be used
Colormap can be defined by user as [n*3] array in RGB color format between 0 and 255

Outputs#

Examples#

[x,y]=meshgrid(linspace(-10,10,50),linspace(-10,10,50));
r=sqrt(x.^2+y.^2)+1e-10; %Add 1e-10 to prevent divide by 0
z=sin(r)./r;
plot3ddem(x,y,z,'pcolor','topocmap')

[x,y]=meshgrid(linspace(-10,10,21),linspace(-10,10,21));
z=(sin(x)+sin(y))./(x+y+1e-10); %Add 1e-10 to prevent divide by 0
plot3ddem(x,y,z,'pcolor','topocmap')

x(:,1)=10.*rand(1000,1);
y(:,1)=10.*rand(1000,1);
z=x.^2+y.^2;
plot3ddem(x,y,z,'pcolor','topocmap')

References#

Geospatial data

Colormap

Color