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

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-1
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4answers
80 views

Why does ASTER created -0 to 0 instead of -1 to 1? [on hold]

On my previous question on ASTER I need some more information on ASTER for time series analysis and I need to research on building NDVI because when I ran them for each ASTER. Most of them it came out ...
1
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1answer
34 views

building a water mask

I'm working with multi-temporal datasets from modis and had to do various vegetation indices. I ran into a problem now because there is a significant amount of water too, which skews the resulting ...
0
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2answers
32 views

Matching Landsat 8 with previous Landsat images

I am working with Landsat 8 in ENVI. My image's dimension is 8921 x 13131. I need to apply forest mask to this image which dimension is 8805 x 12321. I try to resize an image, but it doesn't work. ...
1
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1answer
69 views

Imagine files between ERDAS and ENVI

I have ENVI 5.0 , ERDAS 2013 SP2, and ArcGIS 10.1 SP1. Every time I save an Imagine file from ENVI 5.0 and open in ERDAS 2013 and it seems like ERDAS does not like it and it would not open and would ...
0
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0answers
30 views

Python Error in recognising ENVI file

I am trying to read a .bip AVIRIS file using GDAL in Python. here is the code: from osgeo import gdal from osgeo import ogr from osgeo import osr from osgeo import gdal_array from osgeo.gdalconst ...
1
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2answers
140 views

Extract the spectral signature of Landsat 7 and Landsat 8

I have some polygons and I want to extract the spectral signature of the adjacent satellite images. The satellite images that i use are the NDVI from Landsat 7 and 8 and I want to compare the spectral ...
0
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0answers
25 views

Problem in Exporting Vector shapefile to ROI(Region Of Interest) in ENVI-4.7

I working in ENVI image processing software. I want to export shape file to ROI in order to create subset of the image .For This first I loaded shapefile converted that into .evf format .While ...
1
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1answer
34 views

Katalog for Envi

I am working In Process of Image Cataloging of Satellite Imagery. For That I have found Free extension software in ENVI called "KATALOG" .But I cannot find any useful resources for Downloading it. ...
2
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0answers
28 views

“Back calculating” to quantify the “atmospheric effect” of water vapor or other gases in a “corrected” hyperspectral image using QUAC?

I know that when using FLAASH in ENVI, you can produce a water vapor map (caveats considered) from your atmospheric correction. My question is if it is possible to "back-calculate" a water vapor map ...
0
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0answers
16 views

Masked data included in ISODATA classification computations?

I am using ENVI to mask NDVI MOD13Q1 images using the "pixel_reliability" raster included in the MOD13Q1 hdf. All instances of cloud cover (pixel_reliability=3) have been masked (=0). I have applied ...
3
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1answer
52 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 ...
0
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1answer
41 views

Load a .sav file in ENVI

I have a 23-band .sav file that I need to load in ENVI. The 23 bands are 23 time points of MODIS NDVI data. I ultimately want to run a classification on this data. I have been using Data Manager to ...
0
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1answer
140 views

Reprojected MODIS NDVI has range from -32768 to 32767, expected -1 to 1

I'm new to StackExchange and to remote sensing. I am working with MOD13Q1 250m 16-day MVCs. My goal is to use NDVI time-series to classify cropping pattern and crop type, then link this data to ...
0
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1answer
118 views

EVI and SAVI indices for Landsat 7 and Landsat 8

I'm trying to run the indices Savi and EVI at landsat 7 & 8. About SAVI I read this from ESRI and explains very good this index. About SAVI I have a question, I will choose buy my self the L ...
1
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3answers
62 views

What is meaning of Emissive in ENVI?

When I view MOD02 data in ENVI directly with ... File--Open image file, ENVI automatically loads data. So what is the meaning of Emissive? The description of MOD02 data can be found in MOD 02 - ...
0
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1answer
41 views

How can I choose values from stacked raster images according to location of ROI

Before I choosed ROI on land surface temperature (LST) images and obtained pixel values of LST. Now I need pixel value of another images which are stacked multi-band image. My main purpose is to ...
3
votes
4answers
137 views

Some remote sensing tutorials [closed]

I could use some tutorials on remote sensing, but some books provided they are free, would be useful. To be specific, tutorials on ERDAS Imagine, ENVI and other remote sensing software, general ...
0
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1answer
25 views

Raster vertical pixel offset (ALOS AVNIR)

I am working with ALOS AVNIR-2 level 1a. There is a vertical offset/shift of each and every pixel column. It gives sort of a stripy appearance when zooming in. Does anyone have experience with this ...
0
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0answers
35 views

How to save image after linear spectral unmixing using ENVI 4.7

I am trying to save the data value from unmixing method but it didnt show me exact values but it scale up from 0 to 255. I am saving image as tif and other type of image but it doesnt work, I read ...
0
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0answers
42 views

Using MODIS Terra TIF file to get land-water map

So, I have downloaded the 7-2-1 tif data (Not HDF) from the MODIS website and I want to create a map that shows flooded and non-flooded regions. I would like to do ISODATA classification in Matlab ...
1
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1answer
44 views

How can I change the highest and lowest value of image?

I want to change the highest and the lowest value of raster image. I want it to have the highest value of 345 and the lowest of 0. The highest value of original image now is 265 and the lowest is ...
1
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1answer
177 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 ...
0
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4answers
302 views

Fix Landsat 7 SLC-off in ENVI?

I have a couple of Landsat 7 images and they all have striping as a result of the SLC failure. Does anyone have any suggestions as to how to destripe the image using ENVI? I plan to use these images ...
0
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0answers
40 views

How to export decision tree in ENVI to word document

I'd like to include Decision tree in ENVI which I used to classification of land cover types in my paper. Is there any direct way to export this tree into JPEG, TIFF format or word document instead of ...
0
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0answers
132 views

Top-of-atmosphere reflectance conversion with WorldView-2 images

I recently received a set of radiometrically-corrected dynamic range adjusted 8-byte WorldView-2 images. I want to convert to top-of-atmosphere reflectance and would like to use the FLAASH in ENVI 4.8 ...
1
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1answer
77 views

co-registering a vector file to a georeferenced raster image

i would like to co-register a vector file to a raster image by a simple translation in envi. Is it possible to do this in envi? I have tried using the georeferencing tool in arcgis but the vector ...
0
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0answers
57 views

How to convert decision tree to ruleset in eCognition?

I have created a decision tree which created using decision tree tool in ENVI to classify 10 land cover types. Now I want to convert it to a ruleset in eCognition. How can I convert it? Thank you ...
1
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1answer
266 views

Landsat Gap Fill [duplicate]

I am looking for a Landsat gap fill method for quantitative data analysis. The best I have found is a reference to a method called "single file gap fill triangulation" using in ENVI, but am unsure how ...
0
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0answers
46 views

How to Calculate Mean Temperature of 8 bands using ArcGIS for Desktop?

I have an image file which has 8 bands stacked which represents temperature of 8 different days. How do I calculate the mean of these 8 bands and display it in ArcMap?
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0answers
72 views

How to convert MODIS (Vegetation Continuous Fields - MOD44B) to (.img and hdr) in ENVI

Please can anyone help me to convert MODIS (Vegetation Continuous Fields) to (.img and hdr) formats? In ENVI, anytime i try using the MODIS conversion toolkit, a dialog box appears telling me to ...
1
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1answer
107 views

Importing MODIS LST data from MRT in ENVI

I am doing a project on heat island effect using MOD11_A2 data. After processing in MRT I have separate bands. While importing them into ENVI, which bands should I select in the RGB option?
2
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0answers
264 views

Enhanced vegetation index using ENVI 4.7 bandmath

I computed Enhanced Vegetation Index using band math in ENVI 4.7 software. The expression used was: 2.5*((float(b1)- float(b2))/(float(b1)+ (6*float(b2)) +(7.5* float(b3)))) BYTSCL(float(b1), min = ...
1
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2answers
168 views

Vector Machine Classification in ArcGIS

Is it possible to perform a vector machine classification of raster image using the ArcGIS software package. This supervised classification method is available in the ENVI software but not for ArcGIS. ...
2
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0answers
105 views

ENVISAT ASAR .N1 file is not being opened by ERDAS IMAGINE 2011

I am not able to open ENVISAT ASAR .N1 file in ERDAS IMAGINE 2011. The software has direct read option for files of this format. Whenever I try to open the file, software closes automatically giving ...
5
votes
2answers
167 views

How to remove vehicles from an aerial photograph

I have an aerial photograph of an area. The image includes visible traffic signs and vehicles. How can I remove the vehicles from the image? Is it possible to do so in software like Erdas or Envi ...
3
votes
1answer
723 views

How to read/write ENVI metadata using GDAL?

I am trying to use GDAL to read and write images in ENVI format (for example a .bsq file with an associated .hdr file). The GDAL Formats Info page states "Starting with GDAL 1.10, all ENVI header ...
2
votes
2answers
112 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)? ...
1
vote
1answer
89 views

How to recode bands in which max value occur?

I have 2 raster images; ras1 (an image with max value) and ras2 (an image with 5 bands). Basically. ras1 image extracted from ras2 images. I'd like to find bands from ras2 in which max value occur and ...
2
votes
1answer
351 views

MOD 35 Cloud Mask HDF in ENVI

I am having difficulty getting ERDAS or ENVI to correctly read and display cloud mask attributes from MOD 35 HDF files. They files are displayed as 0-255, whereas I expected some kind of code 0, 1, ...
3
votes
2answers
241 views

ENVI BIL file algorithm logic

I have a 6 band Landsat image, RGB and 3 NIF bands. As far as the Band Interleaved by Line (BIL) method goes, the resulting image should have, and I quote ENVI manual: the first line of the first ...
6
votes
1answer
287 views

How to remove clouds in High resolution Imagery(.5 mGeoeye)

i have imagery with high resolution .5m, large parts covered with clouds,so it's obscure many urban areas. thank you.
3
votes
2answers
3k 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 ...
1
vote
1answer
1k views

ENVI Vegetation Index Calculator

I am attempting to input 4-band CIR imagery into ENVI's Vegetation Index Calculator and keep running into the same error: "Wavelengths must be defined to calculate vegetation indices". I have ...
1
vote
1answer
310 views

How to remove pixel values below -1?

I have downloaded NDVI from MODIS website and pixel values go up to -3000 to 1. I want to remove all values below -1. How do I do this? I am using ENVI 4.3
2
votes
1answer
103 views

Error while trying to upload a .bsq file to the geoserver

I am trying to upload a .bsq file (ENVIHdr Coverage Format) to the geoserver. While doing this I got an error message. I am using the "GDAL" Extension for the geoserver. The error message is: "Could ...
6
votes
1answer
167 views

Phenological event extraction in IDL

I’m doing phenological study using a threshold method in IDL. I have a twelve-band image in 2005 (format is in .tiff not ENVI format). Twelve-band means that monthly images (Jan to Dec) have been ...
4
votes
3answers
2k 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 ...
2
votes
2answers
628 views

Reading MODIS L1B into ENVI

I am working with MODIS Terra (and simultaneous ASTER) Level 1B swath data using ENVI and am having one of these "this should be easy" questions about the most direct way to get to geo-referenced ...
1
vote
2answers
412 views

How to import a multiband image into IDL?

I want to run mathematical calculation on monthly NDVI images from april to october. I stacked monthly NDVI images through april to october into an image (with 7 band) using ENVI. Now I wanna import ...
20
votes
5answers
2k views

OpenSource Remote Sensing Tools for Classifying Roofs

with envi image processing and classification tools, you can get roofs from images with some spectral value and then you can convert it some vector data for your app. in python with OpenCV which have ...