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地图创建

创建地图坐标轴和基于 axesm 的地图；设置地图属性

Mapping Toolbox™ 提供了多种创建地图显示的方式，包括地图坐标轴 (自 R2023a 版本起) 和基于 axesm 的地图。

有关地图坐标区与基于 axesm 的地图的比较（包括何时使用每种显示类型），请参阅选择二维地图显示。

函数

`newmap`	Set up new map (自 R2023a 起)
`mapaxes`	Create map axes (自 R2023a 起)
MapAxes Properties	Map axes appearance and behavior (自 R2023a 起)

`gca`	当前坐标区或图
`hold`	添加新绘图时保留当前绘图
`cla`	清空坐标区
MapAxesInteractionOptions Properties	Map axes interaction behavior for apps (自 R2024a 起)

`axesm`	创建基于 `axesm` 的地图
`usamap`	创建基于 `axesm` 的美国地图
`worldmap`	创建基于 `axesm` 的世界区域地图
axesm-Based Map Properties	Control `axesm`-based map appearance and behavior

`axesmui`	Define `axesm`-based map and modify projection and display properties
`gcm`	当前基于 `axesm` 的地图的查询投影结构
`getm`	Query properties of `axesm`-based map
`setm`	设置基于 `axesm` 的地图和图形对象的属性
`ismap`	Determine if axes is `axesm`-based map
`showaxes`	Toggle display of coordinate axes on `axesm`-based map

`clma`	清除当前基于 `axesm` 的地图
`clmo`	Clear graphics objects from `axesm`-based map
`handlem`	Handles of objects on `axesm`-based map
`handlem-ui`	GUI for selecting objects on `axesm`-based map
`hidem`	Hide objects on `axesm`-based map
`ismapped`	Determine if object is projected on `axesm`-based map
`namem`	Names of objects on `axesm`-based map
`showm`	在基于 `axesm` 的地图上显示对象
`tagm`	在基于 `axesm` 的地图上设置对象的 `Tag` 属性

Create 2-D Plots Using Map Axes
Display data on a map using point, line, and polygon plots, bubble charts, images, and pseudocolor raster plots.
Change Projection and Projection Parameters
Map axes automatically reproject plotted data when you change the map projection or projection parameters.
Create Map Axes in App
Use App Designer to create an app that includes a map axes object and components that control the map projection and the visibility of plotted data.

axesm-Based Maps
An axesm-based map contains the standard properties of a MATLAB^® graphics axes and additional properties related to projections, scale, and positioning in geographic coordinates.
Create Maps of World and US Regions
Create maps of continents, countries, and US states by using the worldmap and usamap functions. The functions automatically select projections based on the specified region.
Switch Between Projections
Change the projection of an axesm-based map. Usually the new map projection displays the same part of the world. Refine the map appearance by adjusting the properties of the axesm-based map.
Reprojection of Graphics Objects
axesm-based maps automatically reproject many types of plotted objects based on changes to the map projection or to some map properties.
Change Map Projections When Using geoshow
Change the projection of an axesm-based map after using geoshow to display raster and vector data.