gimms | Download and process GIMMS3g NDVI binary data

by environmentalinformatics-marburg R Version: Current License: Non-SPDX

X-Ray Key Features Code Snippets Community Discussions(3)Vulnerabilities Install Support

kandi X-RAY | gimms Summary

gimms is a R library. gimms has no bugs, it has no vulnerabilities and it has low support. However gimms has a Non-SPDX License. You can download it from GitHub.

cran | ---- | |. ... is an open-access tutorial about the gimms package which has been developed using gitbook. the default server for online file retrieval changed from ecocast to a big earth data platform for three poles operated by the national center for atmospheric research. ecocast is currently not reachable, and will likely no longer be considered in future releases. this change does not affect the core functionality provided by the package. online file retrieval from ecocast was recently unavailable due to ssl certificate issues. this has been fixed as of gimms-1.1.3. in addition, gimms:::updatenasanex() now yields correct online filepaths as outlined in #3. starting with this update, rasterized ndvi3g.v0 images are no longer kept in memory, but properly linked to their corresponding

Support

Quality

Security

License

Reuse

Support

gimms has a low active ecosystem.

It has 15 star(s) with 7 fork(s). There are 12 watchers for this library.

It had no major release in the last 6 months.

There are 2 open issues and 4 have been closed. On average issues are closed in 120 days. There are 1 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of gimms is current.

Quality

gimms has 0 bugs and 0 code smells.

Security

gimms has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

gimms code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

gimms has a Non-SPDX License.

Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

Reuse

gimms releases are not available. You will need to build from source code and install.

Installation instructions are not available. Examples and code snippets are available.

Top functions reviewed by kandi - BETA

kandi's functional review helps you automatically verify the functionalities of the libraries and avoid rework.
Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of gimms

Get all kandi verified functions for this library.

gimms Key Features

No Key Features are available at this moment for gimms.

gimms Examples and Code Snippets

No Code Snippets are available at this moment for gimms.

Community Discussions

Trending Discussions on gimms

GIMMS NDVI 3g.v1 processing in R

Downloading data from the internet using R

extracting residuals from pixel by pixel regression

QUESTION

GIMMS NDVI 3g.v1 processing in R

Asked 2019-Jul-10 at 19:17

I want to download and process the GIMMS NDVI 3g.v1 collection with R. With the gimms package, I managed to download the full collection but I do not know how to assign dates on the files. My final result, I want to be a raster stack with NDVIs of good quality (zero flag value). So, 2 observations per month, per year. I would really appreciate any help.

...

ANSWER

Answered 2019-Jul-10 at 19:17

I'd recommend you take a look at Florian Detsch's (The package maintainers) blog post on using the package. Why? Florian does a good job of highlighting how to import the files using Gimms and how the package can address organizing the files temporally (i.e. in time order) using update_inventory() and rearrangeFiles() - which my sense is the issue you are encountering.

I hope this points you in the right direction.

https://metvurst.wordpress.com/2015/10/14/introducing-the-gimms-package-6/

Florian also wrote a book guide to the package:

https://envin-marburg.gitbooks.io/introducing-the-r-gimms-package/content/

the above cover the use and application of the package.

Cited Article (Imported for simplicity)

This is a guest post by Florian Detsch

What it is all about

With the most recent update of the AVHRR GIMMS data collection to NDVI3g (Pinzon and Tucker, 2014), we decided to create a package from all functions we have written so far to download and process GIMMS binary files from the NASA ECOCAST server. The package is called gimms and features a collection of fundamental work steps required to get the data into R:

updateInventory to list all GIMMS files available online and
rearrangeFiles to sort (online or local) files by date,
downloadGimms to download selected files,
rasterizeGimms to import the binary data as 'Raster*' objects into R and
monthlyComposite to aggregate the bi-monthly datasets to monthly value composites.

How to install

The gimms package (version 0.1.1) is now officially on CRAN and can be installed directly via

Source https://stackoverflow.com/questions/56833220

QUESTION

Downloading data from the internet using R

Asked 2018-Aug-10 at 15:12

I am trying to download data from the following website

https://gimms.gsfc.nasa.gov/MODIS/std/GMOD09Q1/tif/NDVI/

This website has NDVI data from MODIS sensors. The folders are arranged according to years and days of the year all of which I need to download.

As a test, I tried downloading just one data

...

ANSWER

Answered 2018-Aug-10 at 15:12

To read in memory, try:

Source https://stackoverflow.com/questions/51788610

QUESTION

extracting residuals from pixel by pixel regression

Asked 2017-Oct-23 at 13:04

I am trying to extract the residuals from a regression run pixel by pixel on a raster stack of NDVI/precipitation. My script works when i run it with a small part of my data. But when i try to run the whole of my study area i get: "Error in setValues(out, x) : values must be numeric, integer, logical or factor"

The lm works, since I can extract both slope and intercept. I just cant extract the residuals.

Any idea of how this could be fixed?

Here is my script:

...

ANSWER

Answered 2017-Oct-23 at 13:04

Your function only test if the first layer shows NA values to avoid fitting the model. But there may be NA in other layers. You know that because you added na.action = na.exclude in your lm fit.
The problem is that if the model removes some values because of NA, the residuals will only have the length of the non-NA values. This means that your resulting r vector will have different lengths depending on the amount of NA values in layers. Then, calc is not be able to combine results of different lengths in a stack a a defined number of layers.
To avoid that, you need to specify the length of r in your function and attribute residuals only to non-NA values.
I propose the following function that now works on the dataset your provided. I added (1) the possibility compare more layers of each if you want to extend your exploration (with nlayers), (2) avoid fitting the model if there are only two values to compare in each layer (perfect model), (3) added a try if for any reason the model can fit, this will output values of -1e32 easily findable for further testing.

Source https://stackoverflow.com/questions/46786053

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install gimms

You can download it from GitHub.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

Find more information at: