All Questions
545 questions
0
votes
2
answers
424
views
Image Dodging (color matching algorithm) in ERDAS
I have two LISS 3 images acquired in Feb and March a year apart. I have performed atmospheric correction (haze reduction) for both the images individually before applying the color matching algorithm ...
0
votes
1
answer
272
views
ENVI fmask Error for Landsat 5 data
I'm trying to mask cloud cover of multi-spectral Landsat 5 image containing bands 1-7 that have been preprocessed using dark object subtraction and Landsat calibration.
I am using the fmask tool in ...
0
votes
1
answer
161
views
Differences between imported Landsat-8 images in Erdas Imagine
What is the difference between the images created after importing with USGS Landsat 8 dialog, in particular, the suffixes _msi and _msitir? I understand that they stand for multispectral image and ...
0
votes
0
answers
79
views
Rescaling MNDWI to normalize
This statistic report shows the scale after done the MNDWI index process by using software ENVI 5.1.
Normally expect result have to be -1 to +1 scale.
How to get which scale?
0
votes
1
answer
75
views
FLAASH produces weird peaks
I am applying FLAASH to atmospherically correct and convert to reflectance a hyperspectral image acquired by our airborne system. The problem is that FLAASH (using ENVI) outputs an image where all ...
0
votes
1
answer
158
views
Preparing two images with different dimensions to use in Agisoft PhotoScan
I have two aerial photos that are flowed over the national forest. The photos were scanned by a contractor and they came in various dimensions for each photos.
The one I have had smaller dimension ...
0
votes
1
answer
207
views
ERDAS mosaicPro from 2D view reference layer is not displayed on top
I am having an issue using the ERDAS mosaicPro from 2D view tool. I am using ERDAS 2015. I have two separate Landsat 8 file bands. Band 1 from one date and Band 1 from another date. I have ran the ...
0
votes
0
answers
957
views
gdal_translate not recognizing file format [duplicate]
I am trying to convert a .dat file to a .tif file using gdal_translate. The .dat file comes with an associated .Hdr file of the same name with the metadata (these are geospatial data from SNODAS). ...
0
votes
1
answer
262
views
Preparing raster Image for correlation in ENVI 5.5
I am working with two raster image of the same location with the same extent, both projected to the same coordinate system and having the same cell size. I want to correlate the raster value on the ...
0
votes
1
answer
1k
views
Make layer stacking in ENVI for Landsat 8
I downloaded Landsat image 8 and I made layer stacking for RGB layers in ENVI (Bands 4,3,2) to classify the land cover types. But the problem appeared when I conducted supervised classification.
I ...
0
votes
1
answer
187
views
Specifying band combinations when loading LANDSAT MTL files in ENVI IDL?
I'm somewhat new using ENVI and have a very limited background in programming. I was asked to compile 12 RGB and NIR composites of LANDSAT scenes within a specific timeframe and would like to use ENVI'...
0
votes
1
answer
422
views
Pleiades atmospheric correction
I have phr1a and phr1b images (Pleiades) and I need to make atmospheric correction. First, I tried to do this by using Envi FLAASH. by the way, I tried also ERDAS atcor but there was also same ...
0
votes
1
answer
158
views
"BAD_ALLOC Memory" PSI on ENVI
I'm currently working on S1-images, and I want to process PSI on them. I use ENVI 5.5 with SarScape.
Here are the steps I followed :
I opened 23+1 images (Import Data) and I cropped them using SAR ...
0
votes
0
answers
156
views
Set multiple values to nodata - Erdas Imagine 2015
I am having trouble with the data ranges in the Landsat 8 surface reflectance product which I downloaded from USGS. The Lansat 8 surface reflectance handbook says the valid range is 0 - 10,000 range ...
0
votes
2
answers
312
views
What Geometric model can I use for the old black and white aerial imagery?
I am working a lot of aerial photos that are very old and were scanned by a contractor. The flight were taken and snapshot over the national forest. The aerial photos are not georeference.
I am going ...
0
votes
1
answer
189
views
Batch ENVI IDL PointCloudFeatureExtraction results in unprocessed areas [closed]
I have an IDL-ENVI code to batch PointCloudFeatureExtraction for lidar tiles across a large area, however, when run, the output results in lower areas of each tile as "unprocessed".
So my question is ...
0
votes
0
answers
180
views
Removing "Bow-tie deletion line " from my raster dataset
I am working on VIIRS SDR dataset where I have created geolocated and projected raster of "BrightnessTemperature" using "Latitude" and "Longitude" dataset given in HDF5 format using ENVI. Now my study ...
0
votes
0
answers
106
views
Change DEM to match spatial extent and pixel size of unprojected RADARSAT image (ENVI)
I have a raw "Path Image" RADARSAT image as a CEOS file, which is by default not georeferenced and in units of Digital Numbers (DN). I'm trying to convert it to a projected geotiff in units of ...
0
votes
1
answer
2k
views
Building Masks (0-1 binary image) out of ROIs in Envi Classic?
I have the following 701x551 image in Envi with the shown raster ROIs (By pressing pixelbutton of ROI Tooldialogue window, I've converted the ROIs into raster format but I have access to ROI vectors ...
0
votes
1
answer
149
views
Matching extent (samples & lines) to get multi-temporal stack
I downloaded several Landsat scenes (4x3) to create some multi-temporal stacks to see the phenological difference in April/March - mid summer - autumn. I actually use The EnMap Box which has been ...
0
votes
1
answer
177
views
How to figure out how many ROIs are saved the .roi-file?
I have some .roi-data with stored regions of interest which I created several years ago.
Now I would like to figure out, how many ROIsfor each class are saved in that .roi file.
Open the .roi in Envi ...
0
votes
1
answer
1k
views
PS/SBAS Processing of S1 in Envi Sarscape 5.2
I'm processing a stack of s1a images in PS. I am now running the inversion first step.
In the progress bar, it is stuck at the 'preliminary candidates selection' for quite some time. I am not sure if ...
0
votes
2
answers
1k
views
Reclassifying Landcover Raster in ENVI 5.3?
I have produced a landcover raster using Landsat 8 OLI, Pansharpened image. The derived landcover classified image is placed below:
Now, I am intending to reclassify this image to change its class ...
0
votes
1
answer
153
views
Call Toolbox operators of ENVI from IDL code
Is it possible to call the clustering/classification algorithms included in the toolbox of ENVI (gui) from IDL (source code) and how?
0
votes
0
answers
405
views
ORFEO vs ERDAS: How to extract a good DSM with ORFEO
I'm trying to use ORFEO to check is it suitable to replace ERDAS to perform DSM extraction from stereo pairs. First thing, I can't use ORFEO for complete Pleiades images, it always crashes (my machine ...
0
votes
0
answers
56
views
Derive individual land cover classes from .jpg map
I have a .jpg image which is land cover classification image with 9 classes. I want to extract raster image (.img file) which contains the same classes as .jpg image (9 classes too). Is there any tool ...
0
votes
2
answers
190
views
AVHRR Max NDVI product
I'm trying to take a max annual NDVI product derived from AVHRR and relate it to a specific area that I'm examining.This requires me to identify the region of interest based on Landsat scenes, and ...
0
votes
1
answer
79
views
Question about ERDAS TOC
On occasionally when I open a raster in ERDAS 2013, I get white or yellow circle icons on my ERDAS Contents and tried to find information on ERDAS.
I want to know what does the icon mean ? Thanks ...
0
votes
1
answer
124
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
votes
1
answer
385
views
How do I classify or spot a pixel, based on a specific reflectance values of the six Landsat Bands using Erdas?
I have converted the DN values to the reflectance of a Landsat image to classify the rice field by its stages. To specify the reflectance values of each stages, I have sampled the reflectance values ...
0
votes
1
answer
1k
views
"Display Background value "0" raster"
While publish raster layer in geoserver it shows background as black. How to remove the black color. if there is any options to permanently remove the black color.
0
votes
1
answer
599
views
Aligning imagery in ERDAS Imagine?
I have two Imagine files that I need to mosaic. When I added these two in Erdas Imagine, there is a black gap between them, for example, they are not properly aligned. I know very little bit about ...
0
votes
3
answers
484
views
Mosaicing of multitemporal Sentinel-2 images using ENVI
My aim is to combine several Sentinel-2 Level2A images of the same location/orbit number but at different dates of a year.
I would like to have different options to create that mosaicing (e.g., if ...
-1
votes
2
answers
2k
views
Installing Viper tools for ENVI? [closed]
How can I install the VIPER TOOLS plug-in (for Multiple Endmember Spectral Mixture Analysis) in ENVI 5.1 (and later ENVI versions)?
I have failed to complete the process following the VIPER TOOLS 1....
-1
votes
1
answer
883
views
Analyzing stacked time series NDVI images in ENVI? [closed]
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 ...
-1
votes
1
answer
1k
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?
-1
votes
1
answer
558
views
Estimation of Land Surface Temperature using ENVI 5.2
I am doing research about land surface temperature using Landsat 8 image.
However, I have a problem with them.
I have read literature but i can not do it in ENVI 5.2.
Could you help me step-by-...
-1
votes
1
answer
6k
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.
-1
votes
1
answer
2k
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?
-1
votes
1
answer
672
views
Performing image rectification to a jpeg using ERDAS Imagine [closed]
I am trying to rectify some images on ERDAS Imagine. These images are jpegs. They have no projection data. How do I do this?
-2
votes
1
answer
2k
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 & ENVI 4.7.
Can you ...
-2
votes
1
answer
348
views
Using Mosaicking Images in Erdas software [closed]
Do you know any dissertation which has written about Mosaic briefly?
I did the Mosaic for my Landsat images and I want to explain and write about it.
-2
votes
1
answer
2k
views
Installing Google Earth ribbon tab in Erdas?
I have Erdas Imagine 11 and Google Earth installed, however the Erdas interface does not show the Google Earth ribbon tab. I've tried re-installing both software packages, but the toolbox does not ...
-3
votes
1
answer
211
views
what is the basic programming language or code language for raster swipe tool? [closed]
How to develop a Swipe tool for rasters or vectors (Spatial layer) like openlayers or ErdasImagine. Can any one give me the references please
-3
votes
1
answer
985
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?