Skip to contents

# Parquet files

Source: `vignettes/articles/parquet_files.Rmd`
`parquet_files.Rmd`

If you need to query several municipalities, indicators and zonal statistics, we recommend to download and locally query the parquet files using the `arrow` package.

## BR-DWGD (13.65 GB)

- Evapotranspiration:
- Precipitation:
- Relative Humidity:
- Solar radiation:
- Maximum temperature:
- Minimum temperature:
- Wind speed:

## TerraClimate (1.02 GB)

- Actual Evapotranspiration:
- Climate Water Deficit:
- Potential evapotranspiration:
- Precipitation:
- Runoff:
- Soil Moisture:
- Downward surface shortwave radiation:
- Snow water equivalent:
- Max Temperature:
- Min Temperature:
- Vapor pressure:
- Wind speed:
- Vapor Pressure Deficit:
- PDSI:

## Query example

After downloading the parquets files, you can query them using the `arrow` package.

    library(tidyverse)
    library(arrow)

    brdwgd <- open_dataset(sources = "/parquet/files/address/")

    brdwgd %>%
      filter(code_muni %in% c(3105608, 3304557, 3136702)) %>%
      filter(name == "Tmax_mean") %>%
      filter(date >= as.Date("2008-01-01") & date <= as.Date("2008-12-31")) %>%
      select(code_muni, date, value) %>%
      collect()