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Questions tagged [modis]

Questions about data from the Moderate-Resolution Imaging Spectroradiometer sensors aboard the Terra and Aqua satellites.

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9 views

How to define 3 average month values in a NDVI Modis time serie

I am working with MODIS NDVI rasters from 2016. I have 365 rasters (one per day). I need to have 3 rasters per month (total = 36). First raster = average of the first 10 days. Second raster = average ...
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1answer
32 views

Calculate mean values for all bands and date to a dataframe

I have 5 rasters, each having 10 bands, where each band corresponds to a specific date. How do I calculate mean values for all 10 bands and save them? I need to save the mean values in a dataframe ...
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0answers
29 views

Calculate stats with GDAL Python or rasterio for each bands [on hold]

I have MODIS EVI file stacking with 10bands. I use Python 3 in Spyder. I'm trying to rastersize shapefile and do mask to my MODIS EVI. This is my script : import os import glob from osgeo import ...
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1answer
22 views

Correlating Point Samples and MODIS SST in Google Earth Engine

I've got a dataset of ~60 points that we've taken during a series of oceanographic cruises where we were sampling, among other things, sea surface temperature. I'm interested in comparing these point ...
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1answer
12 views

Get a mask for MODIS (250m, MOD09GQ) using MODIS (500m, MOD09GA) in Google Earth Engine?

How can I use the quality information stored in MODIS (500m) to create a mask for my MODIS (250m) image - e.g. cloud mask? When I merged the two image collections and run a function to detect the ...
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1answer
20 views

Is MODIS sinusoidal tile boundary in Eathdata website real?

I was using MOIDS data MCD12Q1 (MODIS/Terra+Aqua Land Cover Type Yearly L3 Global 500m SIN Grid V00). I try to use PyProj in Python to transform the Sinusoidal projection to lat/lon. It actually ...
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0answers
24 views

Counting number of rasters with values above 0?

I have 1345 rasters from MODIS daily temperature and I need to know the number of days when the temperature is above 0 degree celsius. For convenience, I have averaged the raster pixel value to give ...
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1answer
62 views

Getting Temperature Data of Given Point Using MODIS LST Data?

I am trying to get MODIS satellite data with Google Earth Engine to find temperature data of given points on a map. I would like to get an array of all the points in an area (every 1km square in ...
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0answers
6 views

Reprojecting MODIS netCDFs in ArcMap (Level 3 Standard Mapped Images)

I am trying to do some analysis with Level 3 Standard Mapped MODIS NetCDF files, obtained from the Ocean Color Web level 3 data browser (https://oceancolor.gsfc.nasa.gov/cgi/l3), and I want to project ...
2
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0answers
44 views

gdal.Open is giving none [on hold]

I am having some problem with Gdal.open with my list of raster. I use Python 3 with GDAL 2.2. This is my script: import os import glob from osgeo import gdal import numpy as np import matplotlib....
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3answers
72 views

Batch rename MODIS data?

I have MOD13Q1 NDVI images. Data are named in this format: MOD13Q1.A2007049.h26v06.006.2015161224938_MODIS_Grid_16DAY_250m_500m_VI.tif (YYYYDDD) Here 2007 is a year and 049 is day in year. I ...
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0answers
23 views

layer stack TIFF using python [duplicate]

i work with EVI MODIS and i need to stack all raster i had using python but i don't know how i'm using this backag and script to read my rasters import os import glob from osgeo import ...
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0answers
17 views

Download MODIS data with Daac2Disk - What coordinate system to use with --bbox?

I am using the tool Daac2Disk to download NDVI data. Daac2Disk_ubuntu --shortname MOD13A2 --versionid 006 --browse --begin 2018-11-01 --end 2018-12-31 --bbox -83.713 9.999 -83.248 10.329 --output . ...
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0answers
14 views

Extraction Burned Area from MCD64A1 for Region

I would like to extract burned area and burn date information from MCD64A1 MODIS Collection 6 global burned area product. The data is in monthly composites with burn dates in julian days. I need it ...
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1answer
47 views

Calculating temperature of given area using MODIS LST data?

I am using Google Earth Engine and the MODIS Land Surface Temperature data to try and calculate the temperature of a square of land. Here is my code so far: var dataset = ee.ImageCollection('MODIS/...
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0answers
33 views

Nonlinear regression in Google Earth Engine on each pixel in an image collection using GEE's servers

I am attempting to optimize the parameters for a double-logistic function on an annual MODIS NDVI time series in Google Earth Engine. I have previously looked at Non Linear Regression in Google Earth ...
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1answer
27 views

How to download MODIS NBAR(MCD43B4)product?

Description: The MODIS nadir bidirectional reflectance distribution function adjusted reflectance (NBAR) product (MCD43B4), 1 km spatial resolution and a composited 16 day temporal resolution. ...
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1answer
91 views

Plot times series for stack raster based on a polygons in my area

I am using R language and I would like to create a EVI MODIS time series plot, EVI vs time. I can did method to create a raster stack and plot the average EVI of the total area over time. But I ...
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1answer
28 views

What is the meaning of ' QC_val=0x…' in the bfastSpatial package?

I am using the bfastSpatial package in R. One of the parameters that I have to set is the QC_val=0x 'a number'. I do not understand what number I have to insert. I am using MOD11A2 product (MODIS LST ...
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1answer
26 views

How can I use rts function for time series TIFF using R

I am trying to plot a time series for my TIFF stack MODIS EVI with the rts function. I am trying to use this script but I do not know if I can use it for my TIFF stack. path <- system.file("D:/...
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0answers
34 views

Export image collection Google Earth Engine to Google Cloud Bucket Python API

I have an image collection within GEE's Python API that I want to clip and write to my google cloud bucket. I am working on a Google Cloud VM and have mounted my bucket "gee-bucket22" with gcsfuse. I ...
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1answer
22 views

Does the MODIStsp package computes the QA's and eventually corrects the bad quality pixels?

I am using R's MODIStsp package for downloading MOD11A2 time series products. While executing the command it was written that QA's were computed. Several files were created, LST_Day_1km, QC_Day, ...
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1answer
15 views

Extracting site location from original MODIS sinusoidal projection from Google Earth Engine?

I'm currently trying to find a way to extract site location data from Google Earth Engine for several MODIS products in its original projection (sinusoidal). Yet I have not managed to receive the ...
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1answer
34 views

Using Con tool with iterator in ArcGIS ModelBuilder?

I have been using ArcGIS Modelbuilder on 16 years of MODIS LST 8 day data, ie. quite a few files. I want to use the QC pixel data at error <=1, 2, and 3K to overlay on the base LST data so I can ...
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1answer
25 views

Seeking MODIS Land Surface Temperature reference? [closed]

Can anyone point me toward an article that converts the LST values on the MODIS LST Image to degrees Celsius? My purpose is find a reference (article, book or theses) for this formula that converts ...
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2answers
53 views

Reproject MODIS data using R (results in NAs or no spatial extent)

I am using GLASS albedo data stored here for pre-2000 (AVHRR) data and here for post-2000 data (MODIS). My end goal is to create a raster stack of each month that contains white sky albedo data from ...
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1answer
78 views

Visualize polygon above the image of EVI index in R

I have MODIS images for the EVII index, with a polygon shapefile for specific areas in my area : files MODISEVI MODISEVI all polygons polygon The images of NDVI and the polygons have the same ...
3
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1answer
117 views

NDVI Scaling in Google Earth Engine?

I am trying to download NDVI data from the Google Earth Engine MODIS satellite. I used the following dataset: img = ee.ImageCollection("MODIS/006/MOD13A2") To actually download it, I ran img....
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0answers
19 views

What subset of bands would be most suitable for crop yield prediction?

I am working on a project to predict crop yield at district level from MODIS satellite data for India. For that purpose I am choosing MODIS product MOD13A1 which provides vegetation indices at 500 m ...
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0answers
26 views

Dynamically update chart for entered period in panel with Earth Engine

I am working with MODIS NDVI and I made a script which exports the NDVI values of given coordinates (with a cursor) as a chart (in panel) for a given period. I was wondering how can I improve the ...
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1answer
19 views

Using MODIS metadata in R

I am working with MODIS 1b Data in R, and converted the HDF files into tiffs. They load and plot correctly. I am now trying to convert the values of corrected_counts_scale and ...
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1answer
43 views

Image Collection minimum and maximum Extraction in Google Earth Engine?

I've wrote this code but it makes error about min and max image? var modis = ee.ImageCollection("MODIS/006/MOD13Q1") .filterBounds(geometry) .filterDate("2000-01-01","2001-01-01") .select("NDVI"); ...
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0answers
21 views

How to Write VCI index in Google Earth Engine? [duplicate]

How can I write this equation (NDVI - NDVImin) / (NDVImax - NDVImin) for modis ndvi image collection, could everyone help me please? I don't know, how can I extract min and max for each NDVI in image ...
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0answers
12 views

How extract image collection statistics with image image.reduceRegion in Google Earth Engine? [duplicate]

I am gonna to know that, how can I extract min and max of each image in this code? could everyone help me, please? var modis = ee.ImageCollection("MODIS/006/MOD13Q1") .filterBounds(geometry) ....
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1answer
51 views

Image Collection Statistics in Google Earth Engine?

How can I extarct mean of each image collection in google earth engine? for example for this code: var modis = ee.ImageCollection("MODIS/006/MOD13Q1") .filterBounds(geometry) .filterDate("2000-01-01",...
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0answers
18 views

Setting both spatial extent and resolution when using gdalwarp?

I would like to overlay two tiff image that orginally have different projections. One is MODIS sinusoidal and the other one is WGS84. I use gdalwarp to re-project the latter into the same projection ...
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1answer
41 views

Chart Series By Region in Google Earth Engine?

I've wrote a code for modis ndvi timeseries(code below). But it returns error in chart creating (ui.Chart.image.seriesByRegion) : Error generating chart: Invalid argument specified for ee.Number(): ...
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2answers
90 views

Making stack from many images in Google Earth Engine?

Using the code below, I've computed 20 ndvi images for modis data. How can I stack and save them in a single file? var mod13 = ee.ImageCollection("MODIS/006/MOD13Q1") .filterBounds(geometry) ....
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1answer
42 views

How to calculate the Min & Max value for a pixel from multiple Raster Images?

I have downloaded a Bunch of MODIS MOD13Q1.006 Images for my Study Area, covering a period of 4 years (same scene across time). Now I want to calculate the Min & Max NDVI value for each Pixel, so ...
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0answers
9 views

Does Modis offer MultiYear statistics?

I'm trying to calculate the VCI data for my entire State. I'm using MODIS's 16 day NDVI Average. From this post, I see that I would need to calculate the Min & Max NDVI values for each pixel ...
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1answer
35 views

EVI2 value calculated from MODIS MOD09Q1 not bounded by -1 to 1

I'm trying to derive from MODIS 8 day composite MOD09Q1.006 product My formula follows the standard interpretation: EVI2 = 2.5(NIR-Red)/(NIR + 2.4*Red+1) I already know that MODIS bands for NIR ...
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0answers
82 views

Google Earth Engine plots DOY chart by MODIS tile, not VI composite date

In Google Earth Engine, it is simple to access and plot time series NDVI data from MOD13Q1 using the ui.Chart.image.doySeriesByRegion() function. However, this function plots the mean NDVI value in ...
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1answer
120 views

MODIS downloads using Python

I am trying to get a full-functioning download script specifically for the Modis data (Version 6) on the USG/NASA site (AppEEARS/LPDAAC). I’m running Windows 10. I know that there is an R Modis ...
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1answer
83 views

Can't extract chlorophyll a values from NetCDF file using R

I'm trying to get the chlorophyll a values from a NetCDF file using R software, but all I'm getting are missing values, NA. I would like to know if I'm doing something wrong or if the file really just ...
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0answers
14 views

Convert MOD02 swath to GeoTIFF

I have been trying to open a MOD02 HDF file (MOD02QKM - Level 1B) with HEG (https://newsroom.gsfc.nasa.gov/sdptoolkit/HEG/HEGDownload.html) to be able to convert files to GeoTIFF format. However, I'm ...
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1answer
280 views

Export data from time-series image collection to a table in Google Earth Engine

On Google Earth Engine, I'd like to accomplish two tasks: extract data from every pixel, across a time-series, within the given geometry bounds and save it as a table. I need a column which prints ...
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1answer
43 views

Is the resolution of MYD13A2/MOD13A2 ( MODIS 16 day 1km Global Vegetation Indices) erroneous in Google Earth Engine?

The MODIS vegetation indices collection shows a resolution of 111319.4 metres in Google Earth Engine when, in fact, it should be 1000 metres. Below is my code: var Veg = ee.ImageCollection("MODIS/...
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0answers
59 views

How can centre of 1 Km pixel be 100m apart?

I am working with MODIS C6 derived fire location product distributed by LANCE FIRMS. The product is a point shapefile corresponding to the centre of each 1kmx1km MODIS pixel where fire was detected. ...
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0answers
75 views

Interpreting NDVI curve in Timesat?

I am using 3 years of Modis(MOD13Q1) NDVI data in Timesat, I have selected a small portion of the forest area (fig.2) using processing window in TSM_GUI. As you can see that NDVI graph (blue_line) is ...
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1answer
77 views

Count pixels of different bands in MODIS

I need some help with my script in GEE. I’m working with a MODIS Terra Vegetation Continuous Fields Yearly (MOD44B.051 Terra Vegetation Continuous Fields Yearly Global 250m) and I’m trying to obtain ...