{"id":3532,"date":"2012-05-04T07:46:24","date_gmt":"2012-05-04T12:46:24","guid":{"rendered":"https:\/\/blogs.mathworks.com\/pick\/?p=3532"},"modified":"2012-05-04T07:49:53","modified_gmt":"2012-05-04T12:49:53","slug":"plot-google-map","status":"publish","type":"post","link":"https:\/\/blogs.mathworks.com\/pick\/2012\/05\/04\/plot-google-map\/","title":{"rendered":"Plot Google Map"},"content":{"rendered":"
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Jiro<\/a>'s pick this week is plot_google_map<\/a> by Zohar Bar-Yehuda<\/a>.\r\n <\/p>\r\n

This pick comes from Chad's<\/a> response to Brett's post<\/a>. He says, \"plot_google_map is not only cool, it’s also very easy to use and incredibly useful for plotting spatial data.\"\r\n I played around with this entry and I agree. It's very easy to use; you simply call the function, and it overlays a map on\r\n the current axes based on the latitude and longitude ranges. The part that I really like is the auto-refresh behavior, which\r\n automatically refreshes the map when I zoom into the map.\r\n <\/p>\r\n

Here's the driving route from our headquarter (Natick, MA) to Boston Logan Airport. You should run this and try zooming into\r\n the map. Download the data here<\/a>.\r\n <\/p>

% load route data<\/span>\r\nload NatickToBOS<\/span>\r\n\r\n% plot route data<\/span>\r\nplot(Data001(:, 1), Data001(:, 2), 'r'<\/span>, 'LineWidth'<\/span>, 2);\r\nline(Data001(1, 1), Data001(1, 2), 'Marker'<\/span>, 'o'<\/span>, ...<\/span>\r\n    'Color'<\/span>, 'b'<\/span>, 'MarkerFaceColor'<\/span>, 'b'<\/span>, 'MarkerSize'<\/span>, 10);\r\nline(Data001(end, 1), Data001(end, 2), 'Marker'<\/span>, 's'<\/span>, ...<\/span>\r\n    'Color'<\/span>, 'b'<\/span>, 'MarkerFaceColor'<\/span>, 'b'<\/span>, 'MarkerSize'<\/span>, 10);\r\nxlim([-71.4, -71]); axis equal<\/span> off<\/span>\r\n\r\n% Google map<\/span>\r\nplot_google_map('maptype'<\/span>, 'roadmap'<\/span>);<\/pre> 
One suggestion I have is to add the auto-refresh behavior for panning, in addition to zooming. It's very simple to do that.\r\n      There's a section in the code that implements this for the zoom action:\r\n   <\/p>
zoomHandle = zoom;\r\nset(zoomHandle, 'ActionPostCallback'<\/span>, @update_google_map);<\/pre>
You can do the same thing for the pan action like this:<\/p>
panHandle = pan;\r\nset(panHandle, 'ActionPostCallback'<\/span>, @update_google_map);<\/pre>
With this, if you pan the map, the graphics will update after releasing the mouse.<\/p>\r\n   
Thanks Zohar for the entry and Chad for the recommendation!<\/p>\r\n   
Comments<\/b><\/p>\r\n   
Give this a try and let us know what you think here<\/a> or leave a comment<\/a> for Zohar.\r\n   <\/p>