# cedar-graph
使用 cedarkit-maps 开发的绘图示例包。
## 快速绘图
绘制 2 米温度填充图
```py
from cedar_graph.quickplot import quick_plot
plot_type = "cn.t_2m.default"
plot_settings = dict(
system_name="CMA-GFS",
start_time="2024073000",
forecast_time="48h",
)
quick_plot(
plot_type=plot_type,
**plot_settings,
)
```
绘制区域 10 米风场填充图
```py
from cedar_graph.quickplot import quick_plot
from cedarkit.maps.util import AreaRange
plot_type = "cn.wind_10m.default"
plot_settings = dict(
system_name="CMA-MESO",
start_time="2024073000",
forecast_time="48h",
area_name="NorthEast",
area_range=AreaRange.from_tuple((108, 137, 37, 55))
)
quick_plot(
plot_type=plot_type,
**plot_settings,
)
```
## 绘图模块
使用绘图模块的函数和类实现图形绘制
```py
import pandas as pd
from cedar_graph.plots.cn.t_2m.default import PlotMetadata, plot, load_data
from cedar_graph.data import LocalDataSource, DataLoader
system_name = "CMA-MESO"
start_time = pd.to_datetime("2024-07-17 00:00:00")
forecast_time = pd.to_timedelta("24h")
metadata = PlotMetadata(
start_time=start_time,
forecast_time=forecast_time,
system_name=system_name
)
# system -> field
data_source = LocalDataSource(system_name=system_name)
data_loader = DataLoader(data_source=data_source)
plot_data = load_data(
data_loader=data_loader,
start_time=start_time,
forecast_time=forecast_time
)
# field -> plot
panel = plot(
plot_data=plot_data,
plot_metadata=metadata,
)
# plot -> output
panel.show()
```
## 绘图清单
| 类别 | 名称 | 说明 |
|----|---------------------|---------------------------|
| 常规 | | |
| | height_500_mslp | 500hPa高度场+海平面气压 |
| | height_500_wind_850 | 500hPa高度场+850hPa风场 |
| | t_2m | 2米温度 |
| | wind_10m | 10米风场 |
| 诊断 | | |
| | radar_reflectivity | 雷达组合反射率 |
| | div_wind | 散度+风场 |
| | k_wind | K指数+风场 |
| | cin_wind | CIN+风场 |
| | cape_wind | CAPE+风场 |
| | bpli_wind | 最优抬升指数+风场 |
| | pte_wind | 500hPa与850hPa假相当位温之差+风场 |
| | qv_div | 水汽通量散度 |
| | shr | 垂直风切变 (0-1km/0-3km/0-6km) |
| | t_dew_t | 温度和露点差 |
| 降水 | | |
| | prep_24h | 24小时降水 (多相态) |
| | rain_24h | 24小时降水 |
| | rain_wind_10m | 1/3/6/12/24小时降水+10米风场 |
## LICENSE
Copyright © 2024, developers at cemc-oper.
`cedar-graph` is licensed under [Apache License V2.0](./LICENSE)
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