MATLAB: How to change the spacing of grid lines on the map in the Mapping Toolbox

Mapping Toolbox

I am using the PLOTM command followed by the GRIDM command to produce a grid on my map. However, I would like to alter the spacing of the grid lines such that I get latitude and longitude lines at 2 degree intervals.

Best Answer

To adjust the spacing between the latitude and longitude lines of your grid, set the MLineLocation (Meridians) and PLineLocation (Parallels) properties of your grid appropriately. You may use the following code:

gridm('on');
gridm('mlinelocation',2,'plinelocation',2)

to set a spacing of 2 degrees each between the meridians and parallels respectively.

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MATLAB: How to increase the resolution of latitude longitude gird ??

To change the default meridian and parallel spacing after creating a map axes with worldmap, set the MLineLocation and PLineLocation properties using setm. The following sets the spacing to 1 degree:

setm(gca,'MLineLocation',1,'PLineLocation',1)

Use doc('axesm') to bring up the axesm reference page and learn more about these and other map axes properties.

MATLAB: How to add a specific latitude and longitude to a map using the Mapping Toolbox 2.1 (R14SP2)

In order to add a specific latitude and longitude to a map you need to specify the ‘plinelocation’ and ‘mlinelocation’ properties of the AXESM function. These properties accept either intervals or specific vectors. For example, if you would like to specify the grid meridian every 20 degrees you would use the following command, after plotting the map:

setm(gca,'mlinelocation',20)

If you would like to specify meridians in specific places, for example at 40, 70, 90 and 100 degrees, you would use the following command:

setm(gca,'mlinelocation',[40 70 90 100])

The same commands may be used to specify the parallels, just substitute ‘mlinelocation’ with ‘plinelocation’. Please note that these commands do not change the labels, in order to change the labels you need to specify the ‘plabellocation’ and ‘mlabellocation’ properties of AXESM function. Following the example above, you can use the following commands to set the meridian and parallel labels:

setm(gca,'mlabellocation',20)

or:

setm(gca,'mlabellocation',[40 70 90 100])

Substitute ‘mlabellocation’ with ‘plabellocation’ in order to label the parallels.

For more information on AXESM type and its properties type:

doc axesm

at the MATLAB Command Window or go to:

http://www.mathworks.com/help/releases/R14sp2/toolbox/map/axesm.html

Best Answer

Related Solutions

MATLAB: How to increase the resolution of latitude longitude gird ??

MATLAB: How to add a specific latitude and longitude to a map using the Mapping Toolbox 2.1 (R14SP2)

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