Tuesday, 25 July 2017

The new MODIStsp website (based on pkgdown) is online !

The MODIStsp website, which lay abandoned since several months on github pages, recently underwent a major overhaul thanks to pkgdown. The new site is now available at http://lbusett.github.io/MODIStsp/



Tuesday, 18 April 2017

MODIStsp (v 1.3.2) is on CRAN !




We are glad to report that MODIStsp is now also available on CRAN ! From now on, you can therefore install it by simply using:

install.packages("MODIStsp")

In v 1.3.2 we also added the functionality to automatically apply scale and offset coefficients on MODIS original values according with the specifications of single MODIS products. Setting the new "Scale output values" option to "Yes", scale factors and offsets are applied (if existing).

In this case, for example, Land Surface Temperature values in the output rasters will be in °K, and spectral indices will be floating point values (e.g., NDVI will be between -1 and 1 instead than between -10000 and 10000).




We also corrected a few bugs, affecting in particular ftp download, and modified the names of some output layers to reduce the length and homogenize output file names, and correct a few  errors.

The changelog for v1.3.2 can be found HERE

We hope you will find the new version useful and that we didn't introduce too many bugs ! Please report any problems in our issues GitHub page.

The `development` version of MODIStsp, containing the latest updates and bug fixes,  will still be available on GitHub. It can be installed using:

library(devtools)
install_github("lbusett/MODIStsp", ref = "master")

"MODIStsp" is a R package allowing automatic download and preprocessing of MODIS Land Products time series - you can find additional information here

Monday, 13 February 2017

MODIStsp v.1.3.1 released !


 
  • "MODIStsp" is a R package allowing automatic download and preprocessing of MODIS Land Products time series, available at this https://github.com/lbusett/MODIStsp github page (See also here for additional information)

  • v1.3.1 adds functionality for processing of MODIS snow cover products, accelerated download, processing of specified portions of years, plus various bug fixing and improvements.


MODIStsp: the main processing GUI



See here for a detailed description of introduced changes

We hope you will find the new version useful and that we didn't introduce too many bugs ! Please report any problems in our issues GitHub page !

Monday, 7 November 2016

MODIStsp v1.3.0 released - adds support for Collection 6 datasets

MODIStsp v1.3.0 has been finally released !

It adds the much-needed functionality for downloading and preprocessing MODIS Collection 006 datasets. Off-line preprocessing of already downloaded hdf images was also improved, and the GUI was a bit revamped to improve user-friendliness (A detailed changelog can be found here). 

More detailed usage instructions were also added to the main github page, and a FAQ section addressing common issues with the package (e.g., installation problems, etc) was added.

We hope you will find the new version useful and that we didn't introduce too many bugs ! Please report any problems in our issues GitHub page.

"MODIStsp" is a R package allowing automatic download and preprocessing of MODIS Land Products time series - you can find additional information here


Friday, 16 September 2016

MODIStsp: a new "R" package for MODIS Land Products preprocessing

In this post, we are introducing MODIStsp, a new  "R" package allowing to automatize the creation of time series of rasters derived from Land Products data derived from MODIS satellite data (github.com/lbusett/MODIStsp; www.sciencedirect.com/science/article/pii/S0098300416303107.
Development of MODIStsp started from modifications of the ModisDownload "R" script by Thomas Hengl (spatial-analyst.net/wiki/index.php?title=Download_and_resampling_of_MODIS_images), and successive adaptations by Babak Naimi (r-gis.net/?q=ModisDownload). Their functionalities were gradually incremented with the aim of:
  1. Developing a standalone application allowing to perform several preprocessing steps (e.g., download, mosaicking, reprojection and resize) on all available MODIS land products by exploiting  a powerful and user-friendly GUI front-end;
  2. Allowing the creation of time series of both MODIS original layers and additional Quality Indicators (e.g., data acquisition quality, cloud/snow presence, algorithm used for data production, etc. ) extracted from the aggregated bit-field QA layers
  3. Allowing the automatic calculation and creation of time series of several additional Spectral Indexes starting form MODIS surface reflectance products

Installation and usage

Detailed installation instructions and notes on use of the package, can be found in the main github page of the package (github.com/lbusett/MODIStsp) and in the package's vignette.

Basic interactive usage

Thursday, 15 September 2016

Welcome to this blog !

Hi all,

   I'll use this blog to share posts mostly related to tips and tricks about satellite image analysis in "R", as well as to share interesting resources concerning "R" programming in general and Spatial Processing in particular.

HTH,

Lorenzo