自定义基于 `axesm` 的地图

网格标签、注解、颜色栏、底图图像

通过自定义基于 axesm 的地图来传达数据的信息。控制地图网格的外观、显示文本并添加带标签的颜色栏。通过读取和显示底图图像为数据提供地理上下文。

作为二维 axesm 地图的替代方案是地理坐标区和地图坐标区，它们可用于许多任务，包括探索、出版和 App 构建。有关可以使用 Mapping Toolbox™ 软件创建的二维地图显示的比较，请参阅选择二维地图显示。

函数

`textm`	Project text onto `axesm`-based map
`rotatetext`	将文本旋转至基于 `axesm` 投影的地图上的投影网格线上
`scaleruler`	Add or modify graphic scale on `axesm`-based map
`northarrow`	在基于 `axesm` 的地图上添加北向箭头

`colorbar`	显示色阶的颜色栏
`lcolorbar`	Color bar with text labels
`polcmap`	Create colormap appropriate to political regions
`ind2rgb8`	将索引图像转换为类型为 `uint8` 的 RGB 图像

readBasemapImage Read image from geographic basemap (自 R2022a 起)

`axesscale`	调整坐标区大小以实现等比例
`paperscale`	Set figure properties for printing `axesm`-based map at map scale
`previewmap`	以打印尺寸查看图示

Map Frame
The map frame is the outline of the limits of a map. The shape of the frame is characteristic of the projection.
Map and Frame Limits
The map latitude and longitude limits define the extents of the geodata to display. The frame limits control how the frame fits around the displayed data.
Map Limit Properties
Map limits have properties that enable you to specify your map projection origin and frame limits.
Map Grid
The map grid is the display of meridians and parallels. The spacing and curvature of the grid lines are characteristic of the projection.

Create Plots over Basemap Images
Display a variety of plots over basemap images, including digraphs, contours, and 3-D surfaces.
Display Basemap Images on Maps
Display data over basemap images using map axes, axesm-based maps, and Cartesian axes.