This project is no longer being maintained. Users are encouraged to access the MODIS/VIIRS web service using the REST API. The SOAP web service will be deprecated in the near future. This tutorial is implemented for the REST service in another repository: https://github.com/ornldaac/modis_restservice_qc_filter_R
Author: ORNL DAAC
Date: February 27, 2018
Contact for ORNL DAAC: uso@daac.ornl.gov
The tutorial outlined in the jupyter notebook will explore using the MODISTools library in R to access MODIS Land Products through a standards based SOAP (Simple Object Access Protocol) Web Service hosted by the ORNL DAAC.
Using the MODIS Web Service users can:
- Retrieve MODIS subsets through command line operations
- Download and integrate subsets directly into client-side workflows
- Download and visualize subsets with customized code
... and much more.
This tutorial will demonstrate how to do the following in R:
- build a time series of MOD11A2 land surface temperature from multiple web service requests
- format subset responses for easy integration in R workflows
- perform quality control filtering based on MODIS qc criteria
Input data were accessed through the MODIS Web Service hosted at the ORNL DAAC. All necessary steps for accessing the web service using R are outlined in the jupyter notebook.
Other methods for accessing data through the web service are described at the MODIS web page; https://modis.ornl.gov.
R (3.x recommended). R libraries: MODISTools, ggplot2, scales, tidyr
Access the the tutorial here:
Tutorial