Skip to main content

Questions tagged [modis]

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

Filter by
Sorted by
Tagged with
0 votes
0 answers
34 views

MODIStsp R package: unable to download land cover data

I am trying to download land cover data using the MODIStsp R package without using the GUI, using the following code: library(remotes) remotes::install_github( "ropensci/MODIStsp" ) ...
Saïd Maanan's user avatar
0 votes
0 answers
29 views

Extracting QA bits for cloud mask with MOD09GA state 1km band using Google Earth Engine

I'm working on code for detecting fog and low stratus (FLS) using the QA bits from the state_1km band of the MOD09GA.061 product. I'm trying to select pixels classified as clouds (bit 0-1 Cloud State: ...
Andres Arguedas's user avatar
0 votes
0 answers
17 views

Clipping MODIS HDF file in Python

I am trying to clip MODIS Land Surface Temperature in Python for a defined extent. Even though the files have been clipped, the size (X x Y) of the new file is changed. So when I plot the new data, ...
Ashish Ganesh's user avatar
-1 votes
1 answer
35 views

Does MODIS dataset (MOD09GQ) require atmospheric correction to calculate NDVI?

It took a dataset of satellite images with a high frequency of reception (1 day) to work. The work consists in studying the change in the NDVI coefficient at a certain site during the year. I took ...
senek's user avatar
  • 65
0 votes
2 answers
66 views

Losing z-values from RasterLayer objects after stacking

I am using MODIS LST products. I am extracting the DOY from each raster file and attaching it to the respective raster. However, setZ() works correctly but I only get NULL values using getZ() after ...
coder_001's user avatar
0 votes
0 answers
21 views

Extracting and Exporting multiple band values after appllying reduce regions to a image collection

I am trying to extract 'Optical_Depth_055','AOD_Uncertainty','AOD_QA' bands from Modis data at point locations (point collection) I was able to export just Optical_Depth_055 data using reduceRegions ...
AniketPatil's user avatar
0 votes
1 answer
35 views

Failed to visualize the MODIS fire data based on the uncertainty difference on GEE

I want to visualize the MODIS burn area data according to the differences in the uncertainty level, creating one layer with all the recorded burn area, while the other layer shows the burn area with ...
Cinnamon roll's user avatar
0 votes
1 answer
56 views

GEE error happens when filtering the MODIS fire dataset uncertainty (confidence level)

I try to calculate the burn area from MCD64A1.061 MODIS Burned Area Monthly Global 500m (https://developers.google.com/earth-engine/datasets/catalog/MODIS_061_MCD64A1) on GEE, based on the specific ...
Cinnamon roll's user avatar
0 votes
1 answer
73 views

Unable to compute graph in Google Earth Engine when trying to compute mODIS NDVI Time series analysis of a small region in Crete, Greece

I want to make a simple time series analysis of the past 8 years using MODIS data but I'm unable to compute the graph as I get the following message: Error generating chart: Collection.first: ...
Eppez's user avatar
  • 1
0 votes
0 answers
31 views

Extracting seasonal maximum from smoothed MODIS NDVI time series in Google Earth Engine

I am trying to extract the seasonal maximum NDVI value (01st June to 31st October) from 2000 to 2023, i.e., total 24 NDVI images. For that I have imported the MOD13A2 datasets in the Google Earth ...
CESCRA IARI's user avatar
0 votes
0 answers
43 views

pyModis createMosaicGDAL AttributeError

I've been playing around with the convertmodis_gdal module in pyModis. I've successfully downloaded HDFs, but I've run into a wall mosaicking them. The following is what I've posted on the pyModis ...
kaminka-krasovsky's user avatar
1 vote
1 answer
39 views

NoData strip appears after MODIS data downloaded from GEE

In Google Earth Engine, I used the following code to generate a MODIS NDVI ImageCollection. var batch = require('users/fitoprincipe/geetools:batch'); var ndvi = ee.ImageCollection("MODIS/...
Chu's user avatar
  • 13
0 votes
0 answers
26 views

Using same spatial resolution for NDVI and LST data in machine learning model

I am currently developing a drought forecasting machine learning model and this is my first time handling satellite data. Two of my data sources are the MOD13A1 dataset from Google Earth Engine for ...
Shrey Desai's user avatar
0 votes
1 answer
49 views

Displaying remote sensing imagery on GEE using Folium maps

I am a novice GEE user, and am just getting started with analyzing satellite data using the Python API on Google Colab. I have successfully imported MODIS data and am displaying it using Folium, but ...
Noah Jacobs's user avatar
0 votes
0 answers
70 views

Georeferencing JPSS-1/NOAA-20 L2 data (VJ109_NRT) with Python GDAL

I'm new to satellite image processing. I am working with a collection of VJ109_NRT - JPPS1 images. It is a L2 VIIRS product. They come with an extension .nc. I have read the proposed documentation (...
Alex Mak's user avatar
0 votes
1 answer
43 views

Use of convertmodis_gdal.convertModisGDAL

I tried to get ET and PET layer for MOD16A2 by using convertmodis_gdal.convertModisGDAL: modisconv = convertmodis_gdal.convertModisGDAL(hdf, output, "(1 0 0)", 500, outformat='GTiff', epsg=...
taam's user avatar
  • 1
0 votes
0 answers
18 views

Unable to find MOD11A1/A2 data for Pakistan in GEE

I need to analyze the LST products of MODIS, such as MOD11A1.061 and MOD11A2.061, but I am unable to find any images for the KPK province of Pakistan for 2020 or even for 2021 or 2022. Why am I facing ...
chhmaad's user avatar
0 votes
0 answers
13 views

MODIS MOD13Q1 data time coverage problem

I downloaded modis MOD13Q1 data as shown below, which is 250m NDVI data every 16 days. But I'm not sure about the time range of this data. For example, 2014-01-17-NDVI data, does it cover the period ...
Liang Tian's user avatar
0 votes
1 answer
31 views

I cannot export all image collection with image date for MODIS NDVI

While exporting images the namings are not setting properly with the image date. How can I solve the problem? I have attached the associated code: // Import the MODIS NDVI dataset. var modisNDVI = ee....
Naiem Sheikh's user avatar
0 votes
1 answer
56 views

MODIS MCD641 quality bits from TIFF file in R

I have a TIFF file from MODIS MCD64A1 (burned area) which has a quality flag band with documentation like so: I want to just select where bit 0 and bit 1 = 1 or where the flags are a land grid cell ...
Stefano Potter's user avatar
0 votes
0 answers
67 views

Export Monthly Landsat NDVI Data from GEE

I am trying to export monthly MODIS Terra Daily NDVI data from Google Earth Engine (GEE). Despite researching various platforms, including this one, I find myself at an impasse. I attempted to ...
Ekow_ababio's user avatar
0 votes
0 answers
19 views

Doubt on using reducers with MODIS sinusoidal projection in Google Earth Engine

I am trying to extract the MODIS NDVI value for the pixel closest to a given point using the Python implementation of Google Earth Engine. The point is defined from Google Earth Coordinates (so WGS84) ...
Mutewinter's user avatar
0 votes
0 answers
76 views

Combine and reduce land cover and MODIS collections with different IDs

I need to add the information from Land cover Image Collection (2015-2019) to MODIS Image collection. In practice should be merged fuve land cover images with MODIS images for the whole five year long ...
Anastasiia's user avatar
0 votes
0 answers
53 views

Saving/Exporting Image Collection to asset in GEE

I am using MODIS image collection for irrigation mapping. Due to the outliers present in the MODIS dataset I applied Savitsky Golay filter in that image collection. And when doing other operation on ...
PRAMIT GHIMIRE's user avatar
0 votes
0 answers
59 views

Area calculation of MODIS snow cover

I am trying to Calculate NDSI Snow Cover Area in Percentage and Square Kilometers. But It code not working for me. Code giving me this error, "Error: Image.select: Pattern 'year' did not match ...
Muhammad Waqas's user avatar
1 vote
0 answers
106 views

Generating a CSV table with daily SPM data in Google Earth Engine

I'm trying to generate a CSV table in Google Earth Engine to obtain daily data of Suspended Particulate Matter (SPM) concentration in different locations over a defined period. However, when I run my ...
Jhonnatan Rodriguez's user avatar
1 vote
0 answers
350 views

Calculating ET using MODIS product in GEE

I extracted monthly ET values using MODIS product (MOD16A2 Version 6 Evapotranspiration) in Google Earth Engine. I multiplied the pixel values with the scale factor of 0.1 as identified in the ET band ...
Arjumand's user avatar
0 votes
0 answers
129 views

Process multiple MODIS HDF images iteratively in R

I have various files of MODIS MCD43A3 Version 6.1 (lpdaac.usgs.gov/products/mcd43a3v061). The files are in HDF format. I am using following code in R to change the sinusoidal projection of MODIS files ...
Michael_Brun's user avatar
0 votes
1 answer
211 views

Earthdata log in error for downloading MODIS data (R language)

I feel like I have followed all the correct steps on what is listed online here is my code: (and of course I have my correct earthdata username and password listed). setwd("~") library(MODIS)...
Aaron_Elph's user avatar
0 votes
1 answer
554 views

Comparison between two images with different projections using GDAL

I am pretty new to GDAL, and I want to compare two data sets with different projections, specifically a MODIS L2 product and a simulation--both having their longitude/latitude and environmental ...
magus_e's user avatar
  • 15
1 vote
1 answer
365 views

Calculate total burn area using MODIS Burned Area Monthly Global 500m

I want to calculate the total area burnt in a specific region within a year. I am using MCD64A1.061 MODIS Burned Area Monthly Global 500m for this. Since the data is available on a monthly basis, I ...
gis's user avatar
  • 123
0 votes
1 answer
108 views

ComputedObject (Error) Error in map(ID=2015_01_05): Image.constant: Parameter 'value' is required

I would like to get 5 to 95 percent Day_1km_LST from MOD11A1, but it show this error: ComputedObject (Error) Error in map(ID=2015_01_05): Image.constant: Parameter 'value' is required The Google ...
kunsheng liu's user avatar
0 votes
1 answer
189 views

Creating Monthly Mean Composite of LAI using Modis Dataset

I am trying to calculate the monthly LAI composite, but somehow code is not working. Need Suggestions? It shows this error, Line 36: image.get is not a function. // Define the start and end dates var ...
Muhammad Waqas's user avatar
1 vote
1 answer
84 views

GEE cycle if for skip the null value from Modis "'Day_view_time'" band

I trying to take the time value from Modis band and convert it from local solar time to UTC. After I need to concatenate it with date which I take from system;time_start and print all statistics. ...
Anastasiia's user avatar
0 votes
1 answer
56 views

Python and GDAL. Missing a dimension when using .ReadAsArray()

I'm using MODIS satellite data and I'm loading the data into Python using the Python bindings of GDAL. I want to extract an array of a specific variable with dimensions 7x8x180x360. They are joint ...
Willem Kroese's user avatar
-2 votes
1 answer
90 views

How to extract LST from different points with its coordinates in google earth engine

I am trying to get from different points the LST values. The code works, however, I am not able to identify from which point it is extracting the values. I am trying to get the header of each point ...
JHONNY_2178's user avatar
1 vote
1 answer
110 views

Interpreting quality mask in MODIS snow cover data

I am struggling to understand the masking logic for MODIS snow cover data in the image selected in the code below (and many others like it). In the image: The black areas are "best" ...
John's user avatar
  • 528
1 vote
0 answers
23 views

Cannot calculate max month value and download images of Modis in partal mouths of 2001 and 2002

I cannot calculate max month value and download images of Modis in partal mouths of 2001 and 2002. There will be something wrong in partial months in 2002 with no vale of NDVI and images. I thought ...
Dehua Xu's user avatar
0 votes
1 answer
356 views

Unable to transform edge error when clipping ImageCollection in Google Earth Engine

I am attempting to clip an ImageCollection in GEE, but I keep getting the error "Unable to transform edge (43200.000000, 1.476288 to 43200.000000, 1.477361) from SR-ORG:6974 PLANAR [926....
KAR's user avatar
  • 3
1 vote
0 answers
45 views

Why my NDVI animation using GEE is strange

I would like to show an NDVI animation of some Amazon area to demonstrate the deforest effects. Here is my high-level code. Get the NDVI from MODIS data and only use the images from Sept and December ...
bella's user avatar
  • 11
0 votes
1 answer
208 views

Using ee.Reducer on monthly time series with missing data

I am trying to generate a value of mean MODIS LST for each month in a time series for a feature collection, as well as an overall timeseries minimum and maximum LST for each month of the year. When I ...
Hydro_data's user avatar
1 vote
0 answers
323 views

Multiple linear regression analysis with MODIS EVI (dependent variable) against LST, precipitation and elevation (constant) in Google Earth Engine

Assessing the response of phenology (using EVI as proxy) to changes in temperature and precipitation along an altitudinal gradient from 2001 to 2022. One of the ways I am trying to achieve this is by ...
Geo_CJ's user avatar
  • 77
0 votes
1 answer
24 views

Raster calculations with iteration

I have two sets of raster images, how can I do some raster calculations with iteration? For example, I got TERAA and AQUA land surface temperature(MOD11A1/MYD11A1) images on the same date, and there ...
Ooops's user avatar
  • 19
1 vote
1 answer
391 views

Export yearly median MODIS/061/MOD13Q1-based products using Google Earth Engine

I am trying to export yearly median MODIS-based NDVI products at 250m spatial resolution. I am using the 16 day MODIS/061/MOD13Q1 product. I have found this code which I am following. The yearly ...
Nikos's user avatar
  • 1,073
0 votes
2 answers
73 views

Pixels not matching with GDAL projection of Modis LST hdf data [duplicate]

I have used the following the commands to project MODIS LST .hdf data through GDAL in cygwin: gdalwarp -r bilinear -of GTIFF -tps -t_srs '+proj=utm +zone=29 +datum=WGS84' HDF4_EOS:EOS_SWATH:"...
FlipAD's user avatar
  • 1
2 votes
1 answer
342 views

Parsing MOD13Q1 QA layer using Google Earth Engine JavaScript API

Working with Modis MOD13Q1 data and I am not sure how to correctly parse for pixel QA and DetailedQA. // Call data var CRNP_Oban = ee.FeatureCollection("users/sijehasuk/CRNP_Oban2"), ...
Geo_CJ's user avatar
  • 77
1 vote
1 answer
369 views

Summarise 16-Day Modis image (MOD13Q1) into mean yearly value in GEE

I am new to GEE (about two weeks) and trying to understand the response of NDVI (as proxy for phenology) to temperature and precipitation in the Oban forest of Nigeria. I am using MOD13Q1 (250 m), ...
Geo_CJ's user avatar
  • 77
2 votes
1 answer
185 views

Add to map only certain types of MODIS Land-Cover In Google Earth Engine

I'm trying to create a map on Google Earth Engine with only some Land-Cover class, but I can't find a solution to this problem. I'm using this MODIS dataset: MODIS/061/MCD12Q1/2002_01_01 I'm using ...
frog11235's user avatar
1 vote
2 answers
875 views

Use the .map() function of Google Earth engine between two different images within the same image collection

Context I am using the MODIS layer. I divide the layer into classification bins and would like to assess change between two consecutive years (e.g., year 2005 to year 2006) for the years 2000 to 2020 (...
Thierry's user avatar
  • 119
0 votes
0 answers
63 views

Recommendations for dealing with huge raster data in QGIS

I want to receive information about the number of pixels by category in a multi-polygon using NASA's MODIS landcover dataset. I would use QGIS's raster histogram operator to do so. The polygons are ...
KC15's user avatar
  • 211

1
2 3 4 5
14