geo_axes.contourf()
时间: 2024-02-05 08:10:41 浏览: 71
`geo_axes.contourf()` 是一个用于在地理坐标系上绘制填充等高线图的函数。它的语法如下:
```
geo_axes.contourf(lon, lat, data, levels=None, cmap=None, extend=None, norm=None, **kwargs)
```
其中,`lon` 和 `lat` 分别是经度和纬度的一维数组,表示等高线图的网格点的位置;`data` 表示在这些网格点上的数据值,可以是二维的数组或者一维的数组(此时需要指定 `shape` 参数);`levels` 是等高线的值,如果未指定则会自动计算;`cmap` 是填充颜色的 colormap,如果未指定则使用默认的;`extend` 指定颜色条的取值范围,默认为 `'neither'`;`norm` 是归一化函数。
除了这些常用参数外,`geo_axes.contourf()` 还支持一些其他参数,例如 `alpha` 控制填充颜色的透明度,`edgecolor` 控制等高线边缘的颜色等。
相关问题
fig = plt.figure(figsize=frame_param.long_fig[0], dpi=frame_param.long_fig[1]) geo_axes, proj_1 = axes_helper.get_geo_axes(fig, frame_param.long_fig_geosize) show_fig_logo(fig) colorbar_axes = fig.add_axes(frame_param.colorbar_axes) ct = ColorTable() rc12 = ct.ColorRecords['Rain12HCR'] x, y, v = get_grid_data(rain_frame, 'sum') # 填色 v = gaussian_filter(v, sigma=3) cs = geo_axes.contourf(x, y, v, levels=rc12.Level, colors=rc12.StrColor) # 填图 c_level_station = rain_frame_ah[ (rain_frame_ah['sw_flag'] == 0) & (rain_frame_ah['Station_Id_C'].str.startswith('5'))] c_level_station = c_level_station.reset_index()可以帮我改成在地里坐标轴上绘制散点图吗
当然可以,你可以使用`geo_axes.scatter`方法在地图上绘制散点图。下面是修改后的代码:
```
fig = plt.figure(figsize=frame_param.long_fig[0], dpi=frame_param.long_fig[1])
geo_axes, proj_1 = axes_helper.get_geo_axes(fig, frame_param.long_fig_geosize)
show_fig_logo(fig)
colorbar_axes = fig.add_axes(frame_param.colorbar_axes)
ct = ColorTable()
rc12 = ct.ColorRecords['Rain12HCR']
x, y, v = get_grid_data(rain_frame, 'sum')
# 填色
v = gaussian_filter(v, sigma=3)
cs = geo_axes.contourf(x, y, v, levels=rc12.Level, colors=rc12.StrColor)
# 在地图上绘制散点图
c_level_station = rain_frame_ah[(rain_frame_ah['sw_flag'] == 0) & (rain_frame_ah['Station_Id_C'].str.startswith('5'))]
c_level_station = c_level_station.reset_index()
# 将经纬度坐标转换为地图坐标
lon = c_level_station['Lon'].values
lat = c_level_station['Lat'].values
x, y = proj_1(lon, lat)
geo_axes.scatter(x, y, s=10, c='red')
```
这里我假设你的散点数据包含经纬度信息,我们需要将其转换为地图坐标。另外,`scatter`方法中的参数`s`表示散点的大小,`c`表示散点的颜色。你可以根据需要自行修改。
geo_axes.scatter()
`geo_axes.scatter()` is a method used in the `mpl_toolkits.basemap` module of the `matplotlib` library in Python. This method is used to plot scatter points on a map projection. It takes in the longitude and latitude coordinates as input and can also take additional arguments such as marker style, size, color, etc.
Here's an example usage:
```python
from mpl_toolkits.basemap import Basemap
import matplotlib.pyplot as plt
m = Basemap(projection='merc', llcrnrlat=-80, urcrnrlat=80, llcrnrlon=-180, urcrnrlon=180)
fig = plt.figure(figsize=(10,8))
ax = fig.add_subplot(1,1,1)
# plot scatter points on the map
lons = [0, 45, -30, 80]
lats = [30, -20, 60, -40]
geo_axes = m(lons, lats)
m.scatter(geo_axes[0], geo_axes[1], marker='o', color='r', s=100)
# show the map
m.drawcoastlines()
m.drawcountries()
plt.title('Scatter Points on Map')
plt.show()
```
This will create a map with scatter points plotted at the specified longitude and latitude coordinates.
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