Questions tagged [erdas-imagine]

ERDAS IMAGINE is a remote sensing application with raster graphics editor abilities designed by ERDAS for geospatial applications.

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13 views

Minimum value for the Dark Object Subtraction in ERDAS

How can I find the minimum value from histogram for Dark Object Subtraction in ERDAS? The metadata of Landsat7 shows the minimum pixel value is 1 and when I checked histogram, the pixels are ...
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1answer
35 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 ...
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7 views

Extraction of reflectance value in ERDAS Imagine

How can I extract the reflectance value from a raster in ERDAS Imagine. If possible I would like to know the steps.
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1answer
126 views

Smooth mosaicking of smaller orthomosaics to form a homogenous mosaic

This image below is generated using Erdas Imagine where I used mosaicpro tool to create a super mosaic of orthomosaics generated using PIX4d I used following options: Color Balancing Color Dodging ...
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1answer
55 views

Extracting DEM from PRISM data?

I have PRISM data which is in the following format. Are there any ways (software and methods) to extract the DEM or elevation information from these data files?
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2answers
53 views

Data type doesn't match error in Sieve filter

I classified some land cover types in aerial image with Erdas Imagine, now I want to remove classification errors showing very small areas. I tried to use Sieve filter, but getting error notification "...
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2answers
4k views

Doing change detection in ERDAS

I want to obtain the size of unchanged, decreased, and increased area etc (just like shown in image below) from 2 classification images in 2000 and 2007. How do I do this in ERDAS? .
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1answer
353 views

Assigning signatures in Erdas Imagine 2016

I am having a problem in creating new signatures in Signature Editor in ERDAS 2016. Whenever I click on the icon to add signatures a pallette pops up that says: "ERROR GETTING AOI FROM VIEWER, USE ...
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1answer
1k views

Using Python script to stack layers from multiple directories and produce multiple outputs in ERDAS?

I am using ERDAS Imagine 2013 and am trying to create a Python script that takes lists created in another script containing the path to each scene's raw data folder and base image ID's (for example ...
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13 views

Cloudmask for entire Sentinel-2 .safe directory

I'm using the fmask algorithm to produce cloud masks for Sentinel2-L1C .safe directories. The output is always a single .img file. Afterwards I'd like to compute easy indices like the ndvi on the area ...
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1answer
32 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 ...
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19 views

How to remove the black edges around Landsat 8 images in Erdas Imagine

I am new to Erdas Imagine and would like to know what is the right workflow for removing the Black "null" Edges around Landsat-8 Images. When importing the scenes to .ecw, the color and contrast ...
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22 views

Landsat-8 Image Enhancement for Mosaic in Erdas Imagine

My AOI lies inside a mosaic of 6 Landsat-8 squares and all the scenes have less than 10% cloud coverage. The rows of images of each of the 3 paths were taken only seconds apart. When importing the ...
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1answer
13 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 ...
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1answer
757 views

Black edge (NoData pixels) in Landsat 8 color correction in ERDAS

My boss asked me to mosaic and color-balance multiple Landsat 8 tiles for presentation. I tried to do that in ERDAS but it returned weird result as below: Obviously it's the black edges or nodata ...
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1answer
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.
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23 views

Erdas does not generate tie points

I'm working with stereopair images (2 times 4 images) in Erdas Photogrammetry. I've converted them to IMG filetypes, setup interior orientation and put full GCPs on all images. I added few tiepoints ...
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106 views

Layer stacking Multispectral reflectance imagery in ERDAS Imagine 2016

I have Green, red, Red edge and Near infra-red reflectance maps captured with a Parrot Sequoia camera and post processed with Pix4D. They are all Single Float Tiff files, around 500Mb in size. I ...
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2answers
10k views

Layer stacking Sentinel 2 imagery

Is it possible to layer stack all 13 Sentinel 2 bands or can I only layer stack those that are the same resolution (so for example the blue, green red and NIR bands). I have a very large area of ...
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1answer
309 views

How to download whole ECW or JPG tiles from web viewer?

I've found an online server which has some aerial tiles I'd like to save at maximal resolution for offline use, I'd even be happy with just the whole JPG picture to be later georeferenced again by ...
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2answers
2k views

Shifting cloud mask in Erdas/ArcMap/Py Script [closed]

I have the task to mask out cloud cover in approximately 20 landsat 8 scenes. Creating the cloud mask for the "white part" is easy, but I need help in addressing the clouds shadow. General ...
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2answers
831 views

Deriving slope angle value from DEM using ERDAS Imagine

I am trying to calculate the steepness of each pixels (30m) from the DEM of 2m resolution. I have made use of ERDAS Imagine - Slope function and returns a contour-like pixel image. The pixel value ...
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1answer
831 views

Accuracy assessment in Erdas imagine

Is it necessary to do an accuracy assessment for an unsupervised classification done for a Landsat 5 image?
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36 views

Why does a raster that consists of 3 bands appear greyed out?

I have a raster that is formed by stacking the bands blue, green and red of "Landsat 8", when it is displayed on Erdas Imagine 2015 it appears as if there is a semi-transparent grey layer over it, the ...
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1answer
74 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 ...
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2answers
3k views

Convert ERDAS Imagine AOI to Shapefile

I was trying to convert a very simple Erdas Imagine AOI file (its a single polygon) into a shapefile and was mostly finding documentation on the inverse (SHP to AOI). I was trying to follow the steps ...
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1answer
929 views

Classified image color in Erdas Imagine

I've a ArcMap classified image in tiff format. I want to open it in Erdas for further Accuracy assessment. How to open the image in Erdas with same color ramp as it is given after classification?
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3answers
4k views

Remove clumps of pixels in R

I would like to remove isolated pixels (or clumps of pixels <9) from my raster image. library(raster) # create some raster data r <- raster(ncols=12, nrows=12) set.seed(0) r[] <- round(runif(...
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47 views

Converting .ers raster to .shp?

I am trying to convert .ers-raster into shapefile using ERDAS. It keeps saying "input must be thematic". Any solutions to this or any other method by which I can convert .ers raster into shapefile, ...
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1answer
643 views

ECW not reocgnized as supported file format in GDAL operation

I've installed QGIS 3.6 for MAC, with GDAL 2.4, ECW GDAL Plugin for GDAL 2.4, and manually installed the libraries from ERDAS ECWJP2SDK 5.4. This allows me to insert ECW files as raster layers in ...
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1answer
144 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 ...
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5answers
7k 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
13k views

Creating NDVI from multispectral imagery?

I have LISS IV image data in three bands (band4, band3 and band2). I wanted to know the required steps to obtain the NDVI image from the given data using ERDAS IMAGINE 9.2.
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1answer
340 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 ...
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84 views

Unsupervised classification in ERDAS imagine

I am trying to make a classification to run some index ( like NDVI) to see the change over time using the image difference function. Is it possible to do an unsupervised classification on one image ...
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1answer
156 views

ERDAS Imagine signature picker colour changing RGB numbers?

I've noticed something with the signature picker in ERDAS and I was wondering if it is a bug or a feature. When I create classes I assign a colour to make them easily readable in the classified ...
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1answer
2k views

supervised classification

I am having a problem in creating new signatures in Signature Editor in ERDAS 2014. Whenever I click on the icon (i.e., after selecting the aoi), it shows an error which says "unable to open ...
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44 views

Reprojecting a SHP in QGIS to used it in ERDAS

I´m trying to created a AOI in ERDAS with a shapefile, but this shapefile had a projected system different to system that my image has, because of that I changed the projected system of the shp in ...
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1answer
116 views

Masking an image in Erdas using Thematic Image, the mask comes out looking wrong and completely different than input image

I am trying to mask out shadows and clouds in a WV2 8-band image. I classified an image to identify the shadows and clouds and then using the mask took in erdas used the classified image to mask out ...
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2answers
499 views

How to modify 2 raster images to have the same resolution?

I have data for 2 rasters images that have different resolutions: z downloaded from trmm An MSAVI2 output image. For calculating the correlation between them, the data has to be in the same ...
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2answers
168 views

Projection shapefile

I created a shapefile of Sundarban area Bangladesh. Here it is: Here is the projection information about it: I want this shapefile to project upon an image which is here [I downloaded it from ...
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1answer
103 views

Histograms in Erdas Imagine staying grey

When I open the metadata in Erdas Imagine 2016 of a raster file (I tried several different raster files) the histogram at the histogram button stays grey. I already tried to change the setting of NAs ...
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1answer
1k views

How to work on histograms in ERDAS Imagine?

Is there a possibility to work on histograms in ERDAS Imagine? For example: Compare histograms of different images or different extents Shift them or find patterns I thought there must be good ...
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1answer
185 views

single feature probability in ERDAS object-oriented classification

I'm using ERDAS for my UAV image classification (consists 6 land cover types) and I performed the first step of Object-oriented classification, Single Feature Probability (SFP). It outputted a ...
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69 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 ...
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1answer
407 views

How to make subset from satellite images without getting empty border?

I have Landsat 5-8 images, and after creating subset for the area of interest there is an empty border on the image as black part. How to remove it or how to create subset without it? Here is the view ...
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1answer
155 views

can i merge resolution with float single data type

Can I merge resolution with both image is float single data type? I have done this, but the output image become white. Do the data type must be in unsigned-8 bit for the merge to be success?
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1answer
647 views

Define vector projection and reproject shapefile in ERDAS IMAGINE 2013?

I come from a GIS background mainly using ArcMap and QGIS, but am now doing more image processing work and so have decided to start using ERDAS IMAGINE 2013. I am attempting to project a shapefile ...
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1answer
1k views

ERDAS file not recognized as ERDAS Hierarchal File Architecture (EFHA)?

I am trying to do an accuracy assessment in Erdas using "user defined ground control points" (I collected the GPS points myselfin the field using a handheld GPS). However, when I load the thematic ...
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2answers
726 views

Analysing Landsat images using ERDAS IMAGINE and ArcGIS

I am trying to use the Theil-Sen analysis on the Landsat images to compute vegetation indices, help me figure out how to come up with the median from the Theil-Sen equation in ArcGIS, ERDAS IMAGINE or ...

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