A remote sensing and image analysis software package produced by Exelis Visual Information Solutions (Exelis VIS).

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10 views

How to combine 3 rasters: 1 without Geoinformation, 1 with Lat-coord-values and 1 with Long-coord-values

I have multiple raster images without geoinformation. The geoinformation is stored seperately in two other rasters: one contains the Lat-coordinate of every pixel, the another the Long-coordinates. So ...
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1answer
14 views

How do you digitize an ROI in envi 5.2?

Is there a way to digitize an ROI in ENVI 5.2 that is larger than the area shown in the viewer? I'm setting up labs for an intro to RS class, and the next step is to subset the image to get rid of ...
9
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3answers
7k views

Manually edit a raster to improve a classification?

I have a land cover classification derived from Landsat TM imagery - I created this classification using ENVI. I would like to edit individual and groups of cells in some areas of the classification ...
1
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1answer
333 views

Raster vs. Raster Scatter Plot in ArcGIS

I created two raster datasets from the same world view 2 image. One dataset is NDVI, the other is a normalized surface water index (NDSWI). I would like to create a scatter plot for a pixel by pixel ...
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0answers
15 views

MOD13Q1 data (2008-2012)

i ordered MOD13Q1 images (2008 -2012) from NASA and there came in hdf format, now i want to extract only NDVI images but the hdf made up of all vegetation indices data.Please how can i solve this?
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2answers
158 views

ENVI to map composition

I'd like to print out 6 images in a single page. How can I do this using map composition tools in ENVI (6 images are year-to-year dynamic images with the same size and the same geo-referencing)? ...
0
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1answer
148 views

Analyzing stacked time series NDVI images in ENVI

I just started playing around with stacking NDVI images from different years into one RGB value and am unsure how to read the photos or analyze them. The image on the left had R 2011 G 2011 and B ...
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0answers
13 views

Atmospheric correction using ENVI Flaash

I want to perform atmospheric correction of both Landsat 7 and Landsat 8 data. I am using ENVI 4.5. What scale factor should I choose for Landsat 7 and Landsat 8? Plese suggest.
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2answers
52 views

NetCDF to Geotiff file conversion

How would I convert NetCDF files to Geotiff format? The data I am using is air temperature data that comes from the Climatic Research Institute and I want to display it on ENVI. I am not familiar with ...
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0answers
15 views

Unsupervised (ISODATA) classification in ENVI returns fewest classes possible

Running an unsupervised (ISODATA) classification in ENVI 5.2 consistently returns the fewest classes possible. For example, set to produce anything between 50 and 70 classes, the classification ...
3
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1answer
179 views

ENVI raster file with nodata change to 0

I have a geotiff that I converted to a ENVI raster file with the following command: gdal_translate -of ENVI srtm_05_08.tif data.bil The geotiff has water values supposedly set to nodata. I am ...
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1answer
196 views

ENVI5.0. Is it possible to use “Quickmap” option? How to create a simple map?

I used to work in ENVI 4.8, but now have to move on ENVI5.0 I found it was changed a lot comparably with the previous versions, obtained many good new options, but some old options, in ENVI4.8, are ...
3
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1answer
270 views

Applying pixel reliability mask to time series MOD13Q1

I am working with a 23-band GEOTiff in which each band is a 16-day MVC MODIS NDVI image. The MODIS .hdfs include a "pixel reliability" image with the following values: [-1]: Fill/No Data-Not ...
1
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1answer
97 views

Landsat 8 dataset processing in batch?

I´m trying to open Landsat images at Geotiff with metadata in ENVI. I have a dataset of 101 Landsat 8 images and I want to open all the images and then save them to do some band math either on ...
2
votes
1answer
51 views

Mosaicking many tif files in ArcMap for ENVI

my question is how to go about mosaicking ~120GB, 1200+ tif files into one raster within ArcMap. I am currently splitting up the region in smaller sets and then plan to mosaic all these together to ...
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0answers
18 views

How to export/reproject GEOTIFF with UTM latitude band from ENVI

I'm trying to export GEOTIFFs from ENVI 5.1 SP1 to an app (GIS Pro on an iPad) that seems to require that the zone represent the latitude band and not the hemisphere (e.g. 30U, not 30N). Is there ...
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1answer
57 views

ENVI 5.2.1 How to do an Accuracy Assessment using test data from a shapefile

ENVI 5.2.1. From a .tiff image (4 bands) I created a Supervised Classification Maximum Likelihood .dat file. Now I want to perform an Accuracy Assessment using test data from a shapefile. I've tried ...
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1answer
363 views

How to calculate cumulative mean in ArcGIS, ERDAS and ENVI? [closed]

I'd like to get cumulative mean value from a multiband image (4 bands). How can I do it in ArcGIS, ERDAS and ENVI?
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0answers
28 views

remove black margin of georeferenced image before overlay to google maps

i used envi to georeference satellite imagery. then I tried to overlay that geo image to google map. all fines BUT the black margin appears on the map. is there any way to git rid of that black ...
0
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2answers
593 views

how i calculate land surface temperature using landsat 8 in Envi 5.1

I am doing research about land surface temperature using Landsat 8 image. However, I have a problem with them. I have read document from Landsat.org, but i can not do it in Envi. Could you help me ...
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2answers
760 views

Extract pixels from NDVI in ArcMap

I have a NDVI that I created from a Landsat 5 image. Is there a way to extract all the pixels above a certain threshold and save it as a shapefile? I am trying to create a vegetation mask of sorts to ...
2
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3answers
776 views

Converting Landsat8 DN to TOA reflectance for use in envi

I am used to working in envi, however my current version does not support Landsat8. I downloaded GRASS for the express purpose of converting Landsat8 DN to TOA reflectance for use/analysis in envi. ...
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0answers
21 views

georeferencing envi data with lat/lon in arcmap

I need to georeference gridded ENVI files or rather add georeferencing to the metadata. I do have the lat/lon of the corner points of the data and the spatial resolution. Any suggestions of how to put ...
0
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1answer
30 views

Need to develop a model for measuring inter-annual and seasonal variability in pasture cover using modis 16 day composites

Aiming to use statistical methods in ArcGis and Envi image analysis to measure inter-annual and seasonal variability in paster cover using MODIS 16 day composite image from 2000-2014. Quite stuck on ...
0
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1answer
37 views

Is there anyway to analyze the MODIS MCD12Q1 level 3 data in ENVI?

How can i see the classes of the product MODIS MCD12Q1 and analyze them in ENVI exelis? Seadas open them but ENVI not.
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0answers
10 views

Georeferencing of ROI in ENVI?

I had an image which is not georeferenced for my study area. I have processed the data and made roi files in envi 4.7. Now I have georeferenced the image data. I have a doubt that whether the roi ...
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0answers
7 views

ENVI 4.7 editing overlapping individual classified layer

Does anybody knows how to erase/ eliminate an overlapping individual classification output in ENVI? Thank you
1
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1answer
121 views

How to call Exelis ENVI tools with python and ArcGIS?

I am writing a script for geopocessing landsat data using ArcGIS 10.3. But ArcGIS doesn't have tools for landsat calibration (converting from DN to reflectance) and ENVI have this tool called ...
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1answer
30 views

How to convert an endmember collection spectral signature file from OLI sensor to TM and ETM+ sensors

I'm working on some supervised classifications using scenes from the landsat legacy archive wich include ETM+, TM 5 and OLI data from 2001 to 2014. I have training and validation points for each scene ...
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1answer
154 views

Batch processing in ENVI?

I opened a headerless flat binary file in ENVI. I used menu->save file as->TIFF/GeoTIFF to save it as tiff image. I have 100s of images to convert into tiff. How can I do this batch processing ...
5
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2answers
6k views

How to repair topology of a shapefile?

I performed an object-based image analysis using ENVI EX, and each of the classified features were exported as a shapefile. I transferred those shapefiles into ArcMap 10, and tried to intersect them ...
4
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3answers
3k views

How to create animation from raster data?

I have some NDVI and precipitation/temperature images at the monthly time step from Jan, 2005 to Dec, 2008. I need to create animation image to show the temporal change. How can I do this? Is it ...
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0answers
140 views

EVI and NDVI range value

I've used a Landsat 8 image for vegetation analysis in an urban area. I've got a large maximum number of EVI value as shown in this image: Is this normal in calculating EVI and NDVI? Because I know ...
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2answers
209 views

problems of display modis ndvi with TIMESAT

I use MODIS MRT tool mosicia tow tiles MODIS NDVI data, then use TIMESAT image view to display the mosaic data, encounting file size waring : and after drawing data, the sequences of two tiles is ...
0
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1answer
96 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 ...
0
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1answer
71 views

DEM data processing

I downloaded ASTER GDEM Tiles and mosacked them in ENVI. After that I exported the Mosaic in tiff format and I opening it in Arcgis, the image is gray all through but the pixels are showing correctly. ...
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1answer
1k views

Image classification based on NDVI? [closed]

How can I do classification based on NDVI image. What kind of process and model can do it?
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2answers
84 views

How to destripe the thermal band in SLC_off LandSat 7 ETM+ data?

I am working on a special study in one of my subject. My study would require me to extract land surface temperature each year for 2007-2014. Since LandSat 5 ceaseed to operate last 2011, my 2012-2014 ...
2
votes
5answers
2k views

Batch process to get single band image from stacked image using ArcGIS, ERDAS or ENVI?

Can you help me to extract a single band image from stacked multiband image. Totally, 260 image has been stacked. When I do to this, it will take a long time. So I'd like to know there is any batch ...
0
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0answers
15 views

denoising modis data using envi

I have remove the noises in MODIS ndvi and evi raw data to subject them into regional lulc classification. I am using envi 5.0 . Which module in it will do the job by automated process . I dont ...
1
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1answer
277 views

QUAC atmospheric correction for Landsat-8 (ENVI 5.0)

I try to realize QUAC atmospheric correction for the band 4 and band 5 of Landsat-8 in ENVI5.0. This version doesn’t support Landsat8 (doesn’t have parameters of Landsat-8). At the first step I glued ...
0
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1answer
82 views

atmospheric correction in ENVI 5.1

I want to perform atmospheric correction on Landsat 8 images in ENVI 5.1. In order to create radiance image, I selected basic tools> preprocessing> calibration utilities> Landsat calibration. However, ...
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0answers
21 views

lulc unsupervised classification in envi for modis 250m data

I've got modis 250m data with NDVI,RED,BLUE,NIR,MIR bands....i have to obtain 10 classes such as Urban,Evergreen,decidious,cropland,fallowland,plantaion,water,barrenland,land with scrub,land without ...
0
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0answers
29 views

Suppress values from multiband rasters

I have a raster stack with 84 bands . It is a time series raster. It so appears that the cloud is causing error in my processing and hence i need to suppress or replace them by a NaN to eliminate them ...
0
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1answer
153 views

set cells with specific values as NoData in afloating raster

I have a raster file which includes floating values. I need to set cells with specific values as Nodata. For Raster integer values, the setnull tool can be applied, is it any tool for floating point? ...
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1answer
160 views

Spectral mixture analysis from GeoTIFF in ENVI

I have a single GeoTIFF created from some NGB aerial photography that has been stitched in Agisoft Photoscan to create a single image of an area of heath. I would like to perform spectral mixture ...
3
votes
3answers
1k views

NDVI image value changes from -1 to 1 in ENVI to 0-255 in ArcGIS Desktop and ERDAS Imagine?

When i open NDVI image in ENVI, its value is still within the range (-1 to 1). But when I open this NDVI image in ERDAS and ArcGIS Desktop, its value is 0-255. What does it mean? Is the NDVI ...
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0answers
19 views

Data conversion from IDRISI to ENVI

I have signature data generated with idrisi selva programme(rgf format). How is transfer signature data to ENVI? I want to classification by this signature data in ENVI. Could you answer, please
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0answers
256 views

problem of using TIMESAT to processing MODIS NDVI

I want to use TIMESAT software to analyse time series MODIS NDVI data. Firstly, I use MRT tool to mosaic,subset and project MODIS NDVI data and output data as GEOTIFF format, and save as ENVI standard ...
0
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1answer
64 views

ENVI 5.1 Help with clipping irregular shapes

Does anyone know how to clip files using an irregular shapefile so that I don´t get the rectangle geometry in the end? Thanks so much!!