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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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1answer
8 views

Removing clouds from MODIS chlorophyll data

I am doing a project on the estimation of chlorophyll concentrations along the north Indian ocean, for that, I downloaded modis chlor_a data in .nc-format. But that data contains too much cloud data ...
-1
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0answers
16 views

MODIS (MOD11C3) dataset [on hold]

I have been trying to reproject MODIS (MOD11C3) LST datasets from past three days, always error in MCiDAS, SeaDAS, GRaDS yet no solution for the same. How can I reproject and analyze MODIS (MOD11C3) ...
1
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1answer
22 views

Why is the difference between 005 and 006 versions of MOD13Q1 data?

I tried to repeat a project that used EVI in MOD13Q1. I failed and found that the project used the 005 version of MOD13Q1, and I can only download the 006 version on NASA's ftp. I compared the 005 ...
1
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1answer
21 views

Using accumulate function for temperature units?

I am working on a piece of code that is designed to aggregate growing degree days for a particular region. To start, the equation for growing degree days is: Daily GDD (°F) = Daily Average ...
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0answers
14 views

What is the logic behind MODIS LAI Products “Valid Range”? [closed]

I am puzzled with MODIS LAI Products "Valid Range" (that is between 0-100) while each data scene obviously contains a lot of pixels above this limit as filled values (that is usually 255 ever for ...
1
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1answer
105 views

How big is a MODIS 250m pixel in reality?

How big is a MODIS 250m pixel in reality? This appears to be a question that contains its own answer, but I have several reasons to doubt that the pixel size is actually 250m x 250m: I downloaded ...
2
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0answers
26 views

Downloading subset of MODIS data through HTTPS [closed]

I need to download 'MYD04_3K - MODIS/Aqua Aerosol 5-Min L2 Swath 3km' data for India. I found two ways to download it: Go to the website and select product details etc. I have been able to automate ...
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1answer
19 views

Create KML by date

I have the following table that is populated with new data once a day. postgres=# \d modis_c6 Table "public.modis_c6" Column | Type | Collation | Nullable | Default --...
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0answers
22 views

Growing Season Length in Google Earth Engine?

I am trying to estimate growing season length with the MCD12Q2 dataset (Land Cover Dynamics Yearly L3 Global 500 m), which includes dates for the start and end of the growing season (...
2
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2answers
60 views

Calculating number of days between first and last frost in Google Earth Engine?

I want to do two things. First, I want to map the number of nights that have temperatures below 0 in one year. This code seems to do this. Second, I want to calculate the number of days between ...
1
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1answer
23 views

How to create heat map animation based on point-shapefile with data attribute in ArcGIS?

I want to create an animation of forest fires, using the NASA' MODIS data for the last 11 years. Their shapefile has acquisition data attribute — and it goes day by day all those years. I've already ...
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1answer
30 views

How does ee.Reducer.median() differ from just ee.ImageCollection.median() - Issues with a chart?

I am trying to create a chart that displays an image series from an Image Collection and there are two things that I do not understand: In the first part of the code that you will see below, I do not ...
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1answer
27 views

Why is {maxPixels : } set to 1024 for MODIS and 80 for Landsat?

I am currently trying to understand how images are resampled and reprojected in google earth engine and I came across this tutorial: https://developers.google.com/earth-engine/resample Why is ...
2
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1answer
47 views

NDVI index based on QA bands for MCD43A4 , in GEE

I want to calculate the NDVI index based on the MODIS/006/MCD43A4 collection and based on quality bands, but as a new GEE user I have no idea If I am on the rght way to do this. So far I have the ...
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0answers
33 views

Empty output rasters when running the bfmSpatial function in R

I have 131 monthly MOD11A2 (LST) images and I want to make a time series analysis using the BFAST Monitor. The images came from the average of the original 8day products. I have made them a time ...
3
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1answer
43 views

More information about GEE dataset needed

I have a rather basic question, in relation to the MCD43A4 006 NDVI dataset in GEE. I am aware of the methods used for the generation of the BRDF MODIS dataset, but I would like to know more details ...
3
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1answer
57 views

Reclassification of MODIS collection in Google Earth Engine

I want to reclassify the MCD43A4_006_NDVI collection and change all negative values into NAs. I have the following code but I am not sure how to do this. Any ideas? var geometry = /* color: #...
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1answer
46 views

Google Earth Engine, Image Collection Statistics?

I've wrot below code for time series processing via modis LST product, but it shows this error: ImageCollection (Error) Error in map(ID=2018_06_02): Image.constant: Parameter 'value' is required. ...
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0answers
15 views

How to access MODIS map service from livefeeds.arcgis.com?

How can I access MODIS map service from configurable map viewer ? Here is my code from viewer.js : var token = 'OvKOMsp8IMRZE5E0FbtsmLx-nUMulBrbukj_1w-i_F-Taxpx5wwC3C7ZcufAsOiA-gV-c3-...
1
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1answer
36 views

Trouble Getting MODIS Fire Data with Google Earth Engine

I am trying to use the MODIS Terra Thermal Anomalies & Fire Daily Global dataset to get fire data in a date range at random points. I have the following code: var dataset = ee.ImageCollection('...
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0answers
19 views

Higest-resolution daily temperature products?

I'm looking to collect daily temperatures for a very small geographic area, and as such am in need of some high-resolution products. I have used MODIS, but the data comes with a 1km resolution. Are ...
1
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1answer
43 views

Point data extraction and printing as a TABLE

I am working with MODIS-NDVI image collection in Google Earth Engine. Below, you can find a script which is creating a chart of NDVI values over the given period for particular location. I would like ...
1
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2answers
48 views

How to classify entire pixels within loaded polygons as a feature collection, in Google Earth Engine

I need to determine the Modis pixels that enter whole within the polygons contained within a feature collection. I also need to determine those who don't fully enter. Apologies for English This ...
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1answer
30 views

Select observations based on Quality Bands , Google Earth Engine

From the following NDVI collection, I want to keep only the observations with Good Quality (equal to zero). I try to do this with the SummaryQA but I get "Pattern 'SummaryQA' did not match any bands"...
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1answer
33 views

Unable to transform features into projection, Google Earth Engine

I have the following code with which I try to export the MODIS NDVI index. I have rescaled the collection with the appropriate scale factor and code runs without errors. When I try though to download ...
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0answers
20 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 ...
2
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1answer
59 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
76 views

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

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
31 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 ...
0
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1answer
36 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
57 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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1answer
97 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
17 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
56 views

gdal.Open is giving none [closed]

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....
2
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3answers
90 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
38 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
26 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
20 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 ...
0
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1answer
69 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
92 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
40 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
212 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
38 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
53 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
102 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
31 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
23 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 ...
0
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1answer
46 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
33 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 ...
1
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2answers
83 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 ...