geoSatView

Downloads GOES (GEOS-16 or GEOS-17 currently) or Zoom Earth satellite data and makes video animation using R.

This script performs the following actions:

• For NOAA data:
  • Downloads GOES (GEOS-16 or GEOS-17 currently) satellite data (https://cdn.star.nesdis.noaa.gov/GOES16/ABI/SECTOR/psw/GEOCOLOR/) into data folder.
  • Crops the image (default is focused on California and the Bay Area).
  • Combines the cropped images and associated timestamps into a single image and saves to data_crop folder.
• For Zoom Earth (which includes fire locations) data:
  • Downloads a screenshot at 5 min intervals of the zoom.earth website centered on the West Coast of the United States.
• Then saves out a video file (default mp4) to video folder.

The script requires ffmpeg be installed on users systems if

Usage

To run:

• Download R (or RStudio).
• Either download a zip of the repository or make a new folder and clone with git clone https://github.com/bahanonu/geoSatView.git.
• Make the working directory in R the repository root directory and type the below.
• Alternatively, users can download files to a separate folder by making that folder the active working directory then running source('path/to/geoSatView.R');geoSatView()
• Users can choose between NOAA or zoom.earth sources to create the video. Videos are stored in the data_noaa or data_zoom_earth sub-directories that are created.
• Downloading is parallelized, so output will be stored in progress.log in root directory.

source('geoSatView.R')
geoSatView()

Users can alternatively call the script without user input by using the available options.

source('geoSatView.R')
geoSatView(
    dataDirList=list(NOAA=file.path(getwd(),'data_noaa/'),zoomEarth=file.path(getwd(),'data_zoom_earth/')),
    userChoice=c("NOAA","zoomEarth"),
    createVidFlag=c(2)
)

Options

dataDirList
    list(), format: c(NOAA="PATH_TO_NOAA_DATA",zoomEarth="PATH_TO_zoomEarth_DATA")
userChoice
    char vector, options: "NOAA", "zoomEarth". Can input both c("NOAA","zoomEarth").
createVidFlag
    vector, options: Binary: 1 = create AVI video, 0 = do not create video, 2 = create using ffmpeg system call (fastest)

Example output

Below is an example output. The script is also a useful reference for those looking to manipulate images in R and create videos. The script can also be run from an empty directory, as long as you set that directory as R's working directory.

NOAA

Zoom Earth

Notes:

• Open geoSatView.R to edit further from defaults as needed.
• ImageJ is a useful tool for adjusting the crop defaults.
• The script will skip existing files during downloading and cropping. For cropping, delete all files in the directory if want to make a fresh video.

License

Copyright (c) 2018–2020 Biafra Ahanonu

This project is licensed under the terms of the MIT license. See LICENSE file for details.