Read tsunami data from a spreadsheet into a table.

tsunamis = readtable('tsunamis.xlsx');

Get the latitude and longitude data from the table. This data specifies the locations of the tsunamis. In addition, get data about the size of each tsunami from the table.

lat = tsunamis.Latitude; lon = tsunamis.Longitude; sizedata = tsunamis.MaxHeight;

Create a geographic bubble chart with the tsunami data. Set the title of the size legend by specifyingSizeLegendTitle.

GeoBubble（LAT，LON，Sipedata，'SizeLegendTitle','Maximum Height')

Get the current geographic limits of the chart. By default,geobubblesets the map limits large enough to encompass all the locations in the data.

[LATLIM，LONLIM] = Geolimits

latlim =1×2-79.8575 85.0511

孤独=1×2-295.8338 37.8078

Modify the geographic limits to get a closer look at tsunami activity in Alaska. The example also specifies a title for the geographic bubble chart.

Geolimits([50 65],[-175 -130]) title('Tsunamis in Alaska')

Get the actual geographic limits used by the chart. Due to zoom level quantization and aspect ratio preservation, the actual limits may differ from the requested limits.

[LATLIM，LONLIM] = Geolimits

latlim =1×245.0809 67.9103

孤独=1×2-175.0000 -130.0000