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

learn more… | top users | synonyms

0
votes
0answers
9 views

Urban heat island effect on rainfall [on hold]

Anyone have any information regarding urban heat island identification and to find out the relationship or the effect that UHI having on precipitation using remote sensing and GIS.
1
vote
2answers
284 views

gdalwarp changing value in nodata pixels

I'm using gdalwarp to convert MODIS NDVI mosaics from Sinusoidal to epsg:4326. To save space I'm using VRT files until I reach the final product. Here is my workflow. Mosaic NDVI Modis tiles using ...
2
votes
2answers
2k views

Automatically download Modis image using python script

I need download Modis imagery automatically from the website: https://earthdata.nasa.gov/. I found this link: http://gis-techniques.blogspot.com/2010/06/getting-modis-image-automatically-from.html ...
1
vote
1answer
1k views

MRT (MODIS Reprojection Tool) input error

This is my first time to use Modis Swath Tool to deal with images. I've downloaded 4 MOD44B granules (using the FTP script method), and am trying to use MRT to mosaic them. When I add the 2 files I ...
4
votes
2answers
190 views

Download MODIS data for Mexico

I would like to download MODIS npp images for Mexico but I cannot figure out which files correspond to the country. How can I associate each tile to its location without looking at the million of ...
1
vote
1answer
86 views

Dose pyModis work with “ModisSwathTool” too?

I am going to use pyModis to work with MODIS data, Since I am quite new to Python, before starting to learn and use pyModis, I have a question for those who are familiar and using pyModis, right ...
3
votes
1answer
100 views

pymodis download issues

I'm trying to download and process MODIS imagery using pymodis. I have Python 2.7.8 (Spyder), numpy 1.9.1 and gdal 1.11.1. I've also installed WXPython. I originally tried to use the ...
1
vote
2answers
68 views

Cannot access MODIS Download from FTP using Python

I tried to access the FTP site of MODIS data using Python ftplib module but always fail to connect. I am connecting using: ftp = ftplib.FTP("e4ftl01.cr.usgs.gov") here is the error: A connection ...
0
votes
0answers
21 views

How to fix GDAL_Merge problem?

I've got a lot of modis images (MOD15A2 productos -- LAI) separated by years. Inside each year folder there are the folders with the days i.e 049 folder for DOY 049. What I've done so far is to ...
1
vote
1answer
186 views

applying savitzky golay filter to modis ndvi data

I want to smooth the ndvi MODIS 16 bit integer data .tif for LULC classification . i have timesat 3.1 software on windows but i don't how to apply the SG filter . i am not that good in programming . i ...
-1
votes
0answers
23 views

How do I subset image by vector layer using Erdas Imagine?

I have downloaded MODIS MOD10A2 8 day snow cover image. I need to subset this image. I tried to subset the image in erdas. it says the AOI layer is empty.
6
votes
0answers
215 views

Frontal Detection of sst & Chlorophyll image

I am working on sea surface temperature satellite images and looking for delineating gradients in open source on the basis of temperature. Is there any tool like Cayula and Cornillon front detection ...
3
votes
1answer
361 views

Determining phenological events based on Greatest increase NDVI approach?

I have a problem with a phenological study. The study area is in temperate zone of Asia. I have been doing phenological research using MOD VI product. I wanted to extract phenological events ...
1
vote
1answer
26 views

How to determine the appropriate size of a 3 dimesional raster block/chunk

I am processing large MODIS time series (12 years) dataset with an array dimension of 4800 x 4800 with a data type of Int16-Sixteen bit signed integer. I want to build a 3 dimensional array ...
1
vote
1answer
34 views

Adding Subdatasets in ArcMap

I have some MODIS imagery that I want to display in true colour, however when I add the data it gives me 13 subdatsets to choose from. I've never worked with this before and I'm not sure which ...
0
votes
1answer
185 views

mosaicking and projecting modis land cover data MCD12Q1

I have modis land cover MCD12Q1 data .Its in the sinusoidal projection (.hdf native format ). I have to study the land cover characters from the data for which i have to convert them into .tif format ...
1
vote
0answers
13 views

What is causing LDOPE error when opening .hdf files?

I get the following error when I try using LDOPE-1.7 on Linux (64 bit) with Modis QA data. The specific dataset resides in the LDOPE-1.7 directory. bash-4.1$ ./unpack_sds_bits -of=ldopeQA.hdf ...
0
votes
1answer
32 views

NDVI colour scheme for ArcGIS

Does anyone have a download link for the NDVI colour scheme to use in ArcGIS for Desktop? I am looking for MODIS mod13 data and cannot find an appropriate colour scheme in the programme.
1
vote
1answer
179 views

Maintaining spatial integrity of Matlab matrix with missing data

I am working with MODIS Terra imagery (MOD13Q1). I am currently trying to compute the autocorrelation structure of the pixels in an MODIS NDVI raster. The problem is that I have clipped the original ...
1
vote
2answers
27 views

gdalinfo for Modis layer “NDVI”

I am trying the following command to get info on the NDVI MODIS layer stored in HDF file. I always receive an error. the command and error as below: gdalinfo ...
0
votes
0answers
18 views

SDS for quality assurance MODIS data

Can anyone help me with which quality assurance data to use for MODIS MCD43A4? The QA dataset for this is MCD43A2 which has 4 SDS - Science Data Sets (HDF Layers) 4 UNITS BIT TYPE FILL ...
4
votes
1answer
25 views

Gdal_translate command for SDS having spaces in its name

Can anyone help me with using gdal_translate on an HDF4 dataset that a space? One SDS in the the HDF is: ...
4
votes
2answers
43 views

Accessing the Quality Band for MCD12Q1 with MODISTools GetBands

I am using MODISTools (https://github.com/seantuck12/MODISTools) to process MCD12Q1 data, which, according to the LP DAAC website ...
1
vote
0answers
27 views

Retaining resolution of MODIS data while reprojecting using gdalwarp

Can anyone help me to use gdal(gdalwarp specifically) for reprojection? I am using it to reproject MODIS data : I originally have an hdf file - MCD43A4.A2005001.h08v05.005.2007351192333.hdf which has ...
0
votes
1answer
112 views

Clip .hdf (MODIS) rasters by shapefile

I am trying to do a temporal analysis on vegetation quality so I downloaded a MODIS .hds raster from earthexplorer. When I opened the file into ArcMap 10.2.2, it came as a group of 11 rasters. I stuck ...
0
votes
1answer
135 views

Calculating climatological albedo using MODIS satellite images?

My question is based on the paper Using NOAA AVHRR and SPOT VGT data to estimate surface parameters: application to a mesoscale meteorological model. The authors have calculated albedo, surface ...
1
vote
0answers
41 views

How to mosaic multiple MODIS images of Multiple months using MRT tool?

I have monthly MODIS images for 2001-2014. For few images mosaicing with reprojection can be done using MRT tool. However, for large number of images it's a cumbersome process. There are multiple ...
0
votes
2answers
73 views

extract scientific layers from MODIS HDF Dataeset using Python GDAL

I have been trying to extract scientific data layers from MODIS HDF files but without success. Before I have been doing this type of task using Arcpy, but I want the script that I am currently working ...
0
votes
1answer
91 views

NDVI values for MODIS images

I have downloaded NDVI MODIS 500m image i.e. MOD13A1. From the hdf format that i got i converted them into tif format using the HEG tool. The images that i got some are showing pixel values -32767 to ...
4
votes
2answers
123 views

Reconstructing MODIS time-series applying Savitzky-Golay Filter with Python/Numpy

I want to apply the 'Savitzky-Golay' (savgol) filter to my time series, MODIS dataset, to remove noise (i.e., cloud pixels, etc.) in my data. MODIS have quality flags that indicates the reliability of ...
0
votes
1answer
46 views

Comparison of wildfires areas using NBR index obtained by Landsat 8 for 2 dates?

My aim is to compare two images of NBR index obtained by Landsat 8 for two dates: April the 1st and October the 26th (the beginning of the wildfires period and the ending of the period). After that I ...
0
votes
0answers
15 views

how to apply/mask QC layer of MODIS15A2 for extracting good quality pixels from Leaf Area Index product

how to mask cloudy/noise pixels of MODIS LAI product (MODIS 15A2). I'm using MODIS 15A2 LAI monthly data for LAI estimation.After reprojection and applying scale factor i want to mask bad pixels of ...
0
votes
0answers
112 views

How to download the MODIS data from R using MODISTools library

I want to download MODIS product MOD13Q1 to use the Scientific Data Sets (SDS) layers of "250m_16_days_EVI", "250m_16_days_pixel_reliability". MODISTools library in R software provides the capability ...
7
votes
2answers
303 views

How to download MOD16 (Modis Evapotranspiration) image?

I use a 'R' script for downloading MODIS imageries. However, it doesn't give MOD16 product. I could neither find the MOD16 product in earthexplorer website. Though the desired product is available at ...
4
votes
2answers
110 views

Merging rasters in QGIS?

I have 3 modis tiles that I want to merge together. They were all reprojected in the same CRS (from sinusoidal to WGS84 UTM zone 32 N), but I cannot succeed. I have tried with merge and virtual ...
2
votes
0answers
33 views

TIMESAT seasonality data (MODIS EVI)

I am trying to get seasonality parameters from MODIS EVI (MOD13Q1) for Indonesia. I have loaded data from 2013-2015, but the plotted time-series is shifted from what I expect. Indonesia has ...
0
votes
0answers
37 views

How to correctly parse MODIS QA layers?

I'd like to correctly parse the MOD13Q1 VI Quality layer (see Table 2 in "layers" here). For this, I'm trying to follow Example 1 from this tutorial (page 10). I'll illustrate my problem with a pixel ...
5
votes
1answer
100 views

Reprojecting MODIS-Sphere ESRI GRID file to WGS84 using QGIS/GDAL

I have an ESRI GRID file projected in MODIS-Sphere (here's the dataset http://urban.yale.edu/sites/default/files/data/setoguneralphutyra_uf.zip) that I need to convert to a WGS84 GeoTIFF. I tried ...
0
votes
0answers
39 views

Flood extent maps using modis 09 imagery

I have created rgb using bands 1 and 2 (250m) of mod09 data. Now i need to create flood extent maps from the same composite band. Now I need to use the density slicing method to create slices of land ...
3
votes
1answer
290 views

How can I parse modis MOD13Q1 quality layers in R?

I'd like to parse MOD13Q1 VI quality layers in R. My original code must have been incorrect, because it gave lots of "deep ocean" flags in the middle of Brazil. After the changes suggested by ...
0
votes
4answers
56 views

How to remove NoData areas from modis 09 data?

I have mosaicked modis09 rasters that have areas of NoData values displayed in black, I have used every option possible from raster con and set null conditions in raster calculator to setting the ...
0
votes
0answers
50 views

Reprojecting MODIS NDVI and reading the hdf output file in ENVI

I'm working with ENVI5.3 and want to open a MODIS NDVI (MOD13Q1) in hdf format. Firstly, I used the Modis Reprojeciton Tool to reproject the modis tile. And I opened the reprojected file in hdf format ...
0
votes
1answer
37 views

Selecting one subdataset when using ModelBuilder in ArcMap for reprojection

I'm trying to reproject roughly 500 MODIS images (MOD09GQ) into an Equal Areas Projection. I've been informed that ModelBuilder would be the best way to do this. However, when I set up my model and ...
0
votes
0answers
28 views

Using night/day-time LST product of MODIS?

I was confused with the night- and day-time bands of the LST product of MODIS. As I understood, these two bands are derived based on the zenith angle; more than 90 degrees for night-time LST, and less ...
5
votes
1answer
298 views

MCD43A3 MODIS products

I have MCD43A3 product and I am using that to get the albedo values(Black sky and White Sky). I have some in-situ snow depth data, corresponding to which I want to get these albedo values. For most ...
0
votes
0answers
7 views

How to CONVERT Modis 09 files from hdf to geotiff [duplicate]

I have about 300 modis 09 files that need to be converted to geotiff format. I initially used the MRTSwath tool, but it would not pick some of the files as input giving the message 'Input Header ...
0
votes
0answers
17 views

Wget download selected files in unknown subfolders

I have this script for YEAR in 2013 2014 2015 ; do wget -r -l1 -p -nd -e robots=off -A "h17v03","h18v03" -R .jpg -R .xml http://e4ftl01.cr.usgs.gov/MOLT/MOD13Q1.005/$YEAR.01.01 so it gets 2 ...
1
vote
1answer
40 views

stack 10 modis ndvi geotiffs and scale them by 0.0001

I have 10 geotiffs Modis ndvi named 2005.tif ... 2014.tif I want to stack them all and create timeseries. i know how to do that, but the stacked images still need scaling by 0.0001. how can i bulk ...
2
votes
0answers
52 views

16-day-MODIS NDVI values seem to be wrong compared to my soil moisture ground data!

I'm using MOD13Q1 product of MODIS for estimation soil moisture. As I know, this product is made up of the maximum value of NDVI of each pixel over 16-day calculated NDVI values. The problem is that ...
3
votes
4answers
1k views

climatic data from MODIS or other sources

I'm looking for climatic information in the form of raster like MODIS daily LST (Land Surface Temperature) data. I'm looking for other parameters like precipitation, humidity, air pressure and so on. ...