{"id":8864,"date":"2017-09-23T05:04:16","date_gmt":"2017-09-23T09:04:16","guid":{"rendered":"https:\/\/blogs.mathworks.com\/pick\/?p=8864"},"modified":"2017-11-03T18:35:33","modified_gmt":"2017-11-03T22:35:33","slug":"matlab-basemap-data-r2017b","status":"publish","type":"post","link":"https:\/\/blogs.mathworks.com\/pick\/2017\/09\/23\/matlab-basemap-data-r2017b\/","title":{"rendered":"MATLAB Basemap Data (R2017b)"},"content":{"rendered":"

Jiro<\/a>‘s pick this week is MATLAB Basemap Data<\/a> by MathWorks Mapping Team<\/a>.<\/p>

In the new R2017b release, there is a new interactive geographic function called geobubble<\/tt><\/a> which displays bubbles at geographic locations, with the size and color representing other parameters.<\/p>

tsunamis = readtable('tsunamis.xlsx'<\/span>);\r\ntsunamis.Cause = categorical(tsunamis.Cause);\r\ngb = geobubble(tsunamis,'Latitude'<\/span>,'Longitude'<\/span>, ...<\/span>\r\n    'SizeVariable'<\/span>,'MaxHeight'<\/span>,'ColorVariable'<\/span>,'Cause'<\/span>)\r\n<\/pre>
gb = \r\n  GeographicBubbleChart with properties:\r\n\r\n              Basemap: 'darkwater'\r\n            MapLayout: 'normal'\r\n          SourceTable: [162×20 table]\r\n     LatitudeVariable: 'Latitude'\r\n    LongitudeVariable: 'Longitude'\r\n         SizeVariable: 'MaxHeight'\r\n        ColorVariable: 'Cause'\r\n\r\n  Use GET to show all properties\r\n<\/pre>\"\" 
We can focus on a particular area, for example North America, with geolimits<\/tt><\/a>.<\/p>
geolimits([10 65],[-180 -60])\r\n<\/pre>\"\" 
The background image you see is the basemap. By default, the basemap you’re seeing here is called “darkwater” and is included with the product. You can change the Basemap<\/tt> property to five other maps: grayland<\/em>, bluegreen<\/em>, colorterrain<\/em>, grayterrain<\/em>, landcover<\/em>. These maps are automatically accessed over the Internet. For those with no or low Internet connection, they can download an offline version of the maps.<\/p>
grayland<\/b><\/p>
gb.Basemap = 'grayland'<\/span>;\r\npause(2)\r\n<\/pre>\"\" 
bluegreen<\/b><\/p>
gb.Basemap = 'bluegreen'<\/span>;\r\npause(2)\r\n<\/pre>\"\" 
colorterrain<\/b><\/p>
gb.Basemap = 'colorterrain'<\/span>;\r\npause(2)\r\n<\/pre>\"\" 
grayterrain<\/b><\/p>
gb.Basemap = 'grayterrain'<\/span>;\r\npause(2)\r\n<\/pre>\"\" 
landcover<\/b><\/p>
gb.Basemap = 'landcover'<\/span>;\r\npause(2)\r\n<\/pre>\"\" 
EDIT (to illustrate the exploratory nature of geobubble<\/tt>, as mentioned by Rob):<\/b><\/p>
One of the use cases for geobubble<\/tt> is interactive exploration. For example, I can zoom in with my mouse to see a particular location in greater detail.<\/p>
\"\" <\/p>
R2017b<\/b><\/p>
There are plenty of new, great features in the new R2017b. Take a look at what’s new<\/a>.<\/p>
Comments<\/b><\/p>
Give it a try and let us know what you think here<\/a> or leave a comment<\/a> for the MathWorks Mapping Team.<\/p>