I just installed the mapping toolbox In running the example referenceSphere can not resolve superclass map.geodesy.Sphere.

I get the following error running the example code:

>> worldmap world

Error using referenceSphere

The specified superclass 'map.geodesy.Sphere' contains a parse error, cannot be found on MATLAB's search path, or

is shadowed by another file with the same name.

Error in regionmap (line 51)

e = referenceSphere('earth','meters');

Error in worldmap (line 122)

ax = regionmap(mfilename, varargin);

MATLAB Version: 9.8.0.1323502 (R2020a)

MATLAB License Number: 874794

Operating System: Microsoft Windows 10 Enterprise Version 10.0 (Build 19042)

Java Version: Java 1.8.0_202-b08 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode

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MATLAB Version 9.8 (R2020a)

Antenna Toolbox Version 4.2 (R2020a)

Mapping Toolbox Version 4.10 (R2020a)

Signal Processing Toolbox Version 8.4 (R2020a)

[Steven Lord]

Can you show us what the following commands display?

which -all worldmap
which -all regionmap
which -all referenceSphere
which -all map.geodesy.Sphere

[Paul Martellock]

>> which -all worldmap

which -all regionmap

which -all referenceSphere

which -all map.geodesy.Sphere

C:\Program Files\MATLAB\R2020a\toolbox\map\mapdisp\worldmap.m

C:\Program Files\MATLAB\R2020a\toolbox\map\mapdisp\private\regionmap.m % Private to mapdisp

C:\Program Files\MATLAB\R2020a\toolbox\map\mapgeodesy\referenceSphere.m % referenceSphere constructor

'map.geodesy.Sphere' not found.

Answer 1

[Kojiro Saito]

In R2020a,

which -all map.geodesy.Sphere

will return the following file.

MATLAB_INSTALL\toolbox\shared\mapgeodesy\+map\+geodesy\Sphere.m % map.geodesy.Sphere constructor

toolbox\shared\mapgeodesy folder is created when Mapping Toolbox is installed.

Please confirm toolbox\shared\mapgeodesy\+map\+geodesy\Sphere.m does exist, if it exists, it seems the foloder was removed fomr MATLAB search paht.

So, you will need to do addpath

addpath('C:\Program Files\MATLAB\R2020a\toolbox\shared\mapgeodesy')
savepath

Or reset MATLAB search path to the initial conditions.

restoredefaultpath 

If toolbox\shared\mapgeodesy folder does not exist, there might something wrong in your installation. So you need to install Mapping Toolbox again.

[Paul Martellock]

Thank you this worked!

[Kojiro Saito]

@Paul Martellock

Thank you for your feedback. I would appreciate if you can accept my answer.