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

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26 views

Coordinates of ENVI exported vectors completely reversed when loaded in ArcGIS Desktop?

I have a problem with the coordinates of vector evf in ENVI. I'm working with a well referenced raster doing a supervised classification. The exported vector is completely reversed when loaded in ...
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1answer
119 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 ...
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0answers
52 views

Urban Heat Island USING ENVI

I have downloaded MODIS images for a specified area.. Its my first time that I am working on UHI (Urban Heat Island).. I need to know the methods to work on it.. I am using ENVI for this.
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2answers
492 views

How can i convert .tif file into headerless (flat) binary files?

I am using NDVI files (value range -1 to +1) created from Landsat CDR images to produce a timeseries in TIMESAT software. My .tif file has following characteristics. File type TIFF,Data Type ...
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1answer
214 views

Automatic Lineament Extraction from satellite images using ENVI? [closed]

Can you tell me the steps of automatic lineament extraction from satellite images? Can ENVI perform edge detection and the lineament extraction?
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159 views

How to clip Spot Image using shapefile in ENVi 4.7 or 5.0?

I have a Spot image that I would like to clip using the bounds of a town in shapefile format using ENVI 4.7 or ENVI 5.0. How do I do this?
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0answers
24 views

Exporting landcover clasiffication from ENVI to SAGA

I have basic knowledge in remote sensing and GIS. I have generated landcover map in ENVI 4.7. How can I transfer or Export/Import this into SAGA so that I perform other functions in SAGA. I want to ...
2
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3answers
565 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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1answer
158 views

Processing MOD35_L2 HDF Cloud Masks

I am attempting to create a binary cloud mask from the MOD35_L2 data products located at http://ladsweb.nascom.nasa.gov/data/ When opening the MOD35_L2 data in ENVI or the MRTSwath tool it reports 6 ...
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22 views

MODIS MOD13Q1 extract ndvi value [duplicate]

i have downloaded the MODIS MOD13Q1 from USGS GLOVIS in .hdf format. how i will convert it into original ndvi value by multiplying scale factor of 0.0001. I am using ERDAS IMAGINE 9.1 & ENVI 4.7. ...
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1answer
415 views

MODIS MOD13Q1 ndvi calculation

i have downloaded the modis MOD13Q1 from usgs glovis in hdf format. how i will convert it into original ndvi value by multiplying scale factor of 0.0001. I am using ERDAS 9.1 & evni 4.7. Can you ...
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152 views

Conversion problem of projection of MODIS LAI from sinusoidal to geographic

I am trying to change MODIS data's (LAI) sinusoidal projection to geographic. Actually I did it. But when I reproject it by ERDAS, the output LAI raster moved about 10 km to west side of actual shape ...
2
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1answer
131 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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0answers
42 views

Extract individual land cover classes from NLCD dataset in ENVI

I have a National Land Cover Dataset with 16 different classes. Is there a way to extract the pixels from each individual class and save it as a GeoTiff using ENVI (either Classic or 5.0) so that in ...
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46 views

Vectorized a historical soil map advice

I received a PDF file of a soil map in the Middle Rio Grande Valley near Albuquerque, New Mexico however it is dated in 1914. I was able to split the north and south because it came in one map and ...
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1answer
114 views

GeoTIFF created using ArcGIS for Desktop not displaying in Google Earth or Photoshop?

I originally had an IMAGINE Land Cover raster file that I opened in ArcMap. I used the Extract Feature from Raster to extract only the Developed class and saved it (still IMAGINE). Then I used the ...
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2answers
368 views

.tif and .tfw to GeoTIFF [duplicate]

I have a .tiff and a .tfw file that I want to change into a GeoTIFF. When I try to open the file in ArcMap and ENVI 5.0, it is successful. However, in Google Earth it is not. Is there anyway to ...
2
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1answer
82 views

How to extract impervious areas from Landsat data?

I'm working with multi-temporal datasets from Landsat (Landsat 8 & Landsat 7 & Landsat 5) and I tried to extract impervious areas, more exactly urban areas, but I can't obtained results very ...
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1answer
149 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 ...
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28 views

How to derive acquisition date from short unsigned file using ENVI

I need to derive a processing date from a file which is unsigned short file using ENVI software. The files are in ENVI standard format (image and header file format). I have searched this on Google as ...
2
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1answer
499 views

How to use the same ROI for multiple LANDSAT images in ENVI?

Suppose that I have 3 landsat images with the same datum ( WGS-84 ) and projection system ( UTM, Zone 39N ) as follows: TM LANDSAT 5 image for July 1987 ETM+ LANDSAT 7 image for July 2001 OLI_TIRS ...
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37 views

mod09a1 STATE FLAG

I am using MODIS MOD09A1 surface reflectance data.For each 8 day composite ,one state flg is given which is to be used for extracting a cloudy pixels. MODIS state flaga are stored in 16 bit integer ...
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1answer
42 views

How do I remove TIR bands from current stacked ASTER

How do I remove TIR from already stacked ASTR that has VIS and SWIR bands. I want to do it in ENVI 5.0. Is there a workaround to do this ? The bands I stacked has VIS, SWIR, and TIR.
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2answers
760 views

Digital Number (DN) on satellite imagery? [closed]

How would I know if any of the satellite imagery (Landsat, ASTER, Quickbird and so on) have DN or Digital Numbers such as integer or uninteger on its pixel. I download from the USGS EarthExplorer and ...
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1answer
69 views

Is there is a index that calculates for Sand in ENVI?

On a remote sensing project, I'm trying to identify areas that are sand using band math. I know there is an index for vegetation (NDVI). I was wondering if there is an index that calculates for sand. ...
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206 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 ...
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4answers
2k views

Creating a Time series NDVI map

I would like to create a NDVI Time Series map? How do I do that? The one I probably would like to have similar like this http://proceedings.esri.com/library/userconf/proc02/pap0593/p05931.jpg I ...
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2answers
178 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 ...
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1answer
250 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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4answers
105 views

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

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 ...
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1answer
446 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 ...
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2answers
175 views

Matching Landsat 8 with previous Landsat images

I am working with Landsat 8 in ENVI. My image's dimensions are 8921 x 13131. I need to apply a forest mask to this image with dimensions of 8805 x 12321. I try to resize an image, but it doesn't work. ...
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1answer
731 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 ...
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60 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 ...
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2answers
745 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 ...
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1answer
81 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. ...
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0answers
41 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 ...
3
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1answer
231 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 ...
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1answer
86 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 ...
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1answer
1k 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 ...
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1answer
750 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 ...
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3answers
83 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 - ...
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1answer
156 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
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4answers
454 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 ...
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1answer
48 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 ...
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1answer
63 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 ...
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2answers
600 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 ...
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5answers
1k 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 ...
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1answer
156 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 ...
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1answer
557 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 ...