如何通过API（R语言）正确获取NOAA Local Climatological Data？

Key Issues with Your Original Request #

• Future Date Range: NOAA's Local Climatological Data (LCD) doesn't include future data—your request for 2025-01-01 to 2025-01-31 returns no actual records, hence only headers.
• Redundant Parameter: boundingBox is unnecessary when you explicitly specify stations, as it filters results to a geographic area that already includes your target stations.

Corrected R Code #

Use a valid past date range and clean up parameters. Here's a working example using httr and readr:

library(httr)
library(readr)

# Define API parameters
api_url <- "https://www.ncei.noaa.gov/access/services/data/v1"
params <- list(
  dataset = "local-climatological-data",
  dataTypes = "DailyAverageDewPointTemperature",
  stations = "USW0013874", # Add multiple stations separated by commas (e.g., "USW0013874,USW00012345")
  startDate = "2024-01-01",
  endDate = "2024-01-31",
  format = "csv" # Explicitly request CSV format for easy parsing
)

# Send request and parse data
response <- GET(api_url, query = params)
lcd_data <- read_csv(content(response, as = "text"))

# View results
head(lcd_data)

Notes for Multi-Site Data #

• To fetch data from multiple stations, separate station IDs with commas in the stations parameter (e.g., stations = "USW0013874,USW00012894" for Atlanta and another location).
• Ensure all stations you request have data for your specified date range—some stations may have gaps or stop reporting.

Verifying Data Types #

If you're unsure about data type names, refer to NOAA's LCD dataset documentation for official metric codes/names. For daily average dew point temperature, DailyAverageDewPointTemperature is the correct value for the v1 API.

内容的提问来源于stack exchange，提问作者Stephen Hilton