This change has been incorporated into the documentation in Release 14 Service Pack 3 (R14SP3). For previous releases, read below for any additional information:
The following website provides information relelvant to your application:
From here, you can download "province.zip", which contains a shapefile consisting of the province boundary data for Canada. The SHAPEREAD command can be used to import this file into MATLAB. The file "mx_state.zip" in the same directory contains a shapefile MX_STATE.SHP which provides state boundaries for Mexico.
The coordinates of this data are latitude-longitude, so the following syntax of SHAPEREAD can be used to read in the data correctly:
s = shaperead('MX_STATE.SHP','UseGeoCoords',true);
Please note that as of Mapping 2.1 (R14SP2), the USAHI and USALO functions and associated MAT-files are no longer shipped. However, the data from those MAT-files does still ship with the Mapping Toolbox in shapefile format. See solution 1-12MDM2 for details.
See the following Tech Note for more information on accessing geospatial data, including many publicly available Internet resources.