Unanswered 'erdas-imagine+erdas-imagine+or' Questions

11 votes

0 answers

1k views

What is the convergence threshold for ArcGIS Iso Cluster?

The ArcGIS tool Iso Cluster Unsupervised Classification does not seem to have any documentation on the convergence threshold used in the tool. To compare, Erdas Imagine has all of the necessary ...

Aaron♦

51.8k

asked Nov 16, 2012 at 14:36

4 votes

0 answers

379 views

How to increase Compression Memory for ECW Opacity Builder

I am attempting to build opacity within an ECW file using ECW_Opacity_Builder.exe from APOLLO Essential Utilities 2014, which has worked flawlessly many times before. When attempting to build opacity ...

Michael Stimson

25.7k

asked Jul 6, 2016 at 1:06

4 votes

0 answers

756 views

How to remove black pixels in Landsat image

Does anyone know how I can remove these black pixels around the edge of this Landsat image? They appeared when I layer-stacked the bands in ERDAS IMAGINE - they were not there in the separate band ...

Simba06

861

asked Jan 26, 2016 at 10:41

3 votes

0 answers

273 views

Extracting cells from raster by attribute in ERDAS Imagine

I have a raster file that gives me the slope of all the hills and mountains in an area in degrees (0-90) and I need to extract all the cells which are >= 45 with an operator in the model builder. I ...

Tye

113

asked Mar 4, 2017 at 21:40

3 votes

1 answer

2k 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 ...

djz88426

151

asked May 23, 2014 at 18:33

2 votes

0 answers

118 views

Do PNG files suffer performance for scaled read over ERDAS Imagine (.img) files?

So I have a 20 GB in size Raster Image in .img format. Though I will be examining the code, to find out why, I am AMAZED at how quickly QGIS renders the entire file in a scaled format, and prior to ...

John Sohn

21

asked Apr 8, 2021 at 17:47

2 votes

0 answers

66 views

Solving color correction of LISS IV Multispectral image

I have a LISS IV multispectral images (radiometric resolution of 10 bit per pixel) taken in different months 4 tile in January and 2 tiles taken in February. While mosaicing, I got a different color ...

NEHA GUPTA

21

asked Sep 8, 2020 at 5:10

2 votes

0 answers

694 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 ...

user89463

65

asked Jan 17, 2020 at 16:05

2 votes

2 answers

832 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 ...

Mitesh

129

asked Jun 9, 2018 at 14:57

2 votes

0 answers

143 views

Improving FLAASH atmospheric correction to accurately represent subtle features in a target's spectral profile?

I am attempting to use ERDAS target detection models to detect/differentiate a specific type of soil from a general background. We have gathered spectral signatures of the target soil in the field ...

user88442

21

asked Dec 19, 2016 at 18:36

2 votes

0 answers

217 views

Erdas 2014 process time signature editor supervised classification

I am currently using erdas imagine 2014 with 64bit OS. Basic configurations of my computer are; i7 3820 3.60 GHz CPU, 16 GB memory (RAM), gforce GTX 680 SLI 256 bit Graphic card ( 2GPU ), 250 GB ssd. ...

user82974

21

asked Sep 21, 2016 at 8:58

2 votes

0 answers

308 views

How Does Erdas calculates the ground coordinates for each pixel in the image

How Does Erdas calculates the ground coordinates for each pixel in the image I have a conceptual question regarding photogrammetry, what is the formula used by Erdas to find the (X,Y,Z) on ground. ...

Ahmad saleh

1,044

asked Jan 24, 2016 at 19:47

2 votes

0 answers

56 views

Erdas LPS : how to rename points_ID values?

I'm working with ERDAS LPS 2014, i would like edit the name given for my GCPs and TPs (add the following suffix : "_w"). I tried to do that using the "formula" menu... in vain. I did not find a ...

user35117

919

asked Jan 17, 2016 at 10:36

2 votes

0 answers

274 views

Erdas Imagine 2011 removing points from polygons

I've been running into an issue with Erdas Imagine 2011. I have been creating training sites in a polygon shapefile to use with a decision tree classifier but it seems like the software keep ...

spalka

81

asked Feb 3, 2015 at 20:19

2 votes

0 answers

238 views

Data format in ERDAS IMAGINE 2014?

I performed radiometric correction analysis on Landsat 8 image ( format: integer unsigned 16 bit) in ERDAS IMAGIN 2014. However, the output image would be created if I could select format: float 32 ...

user43362

21

asked Dec 27, 2014 at 7:07

2 votes

0 answers

922 views

Opening image in ERDAS Imagine

I am trying to open a .img image fil in ERDAS Imagine and I keep getting the message "End of file reading dictionary" with ERDAS not responding. The program gets stuck here and I have to shut it down. ...

M. Tobin

21

asked Dec 20, 2014 at 18:29

2 votes

0 answers

431 views

Division by zero error in Erdas imagine 2014

I'm running a Model maker to divide a couple of rasters. The function is as follows: ($n1_band1 / $n2_band2)* 100 There is no zero in both images (both of them are integers). However, I'm still ...

user42930

21

asked Dec 14, 2014 at 9:08

2 votes

0 answers

101 views

How to overlay Radiance (Top-of Atmospheric radiance) over Digital Numbers Image?

I am trying to process INSAT-3D images, which contain six different bands. I have to extract each and every band form the .h5 data file, so when I extract first band (MIR) band form the data set, I ...

Tasneem Ahmed

21

asked Oct 7, 2014 at 10:29

2 votes

0 answers

432 views

Run an ERDAS Imagine pmdl (or bcf) via Python?

How (or is it) possible to run an Erdas Imagine .pmdl model from a Python script? I have successfully run .eml models but cannot get the syntax right for .pmdl Here is what the line I want to run ...

Blazinator

291

asked Sep 8, 2014 at 22:07

2 votes

0 answers

69 views

How to create Strips with GCP point distribution for raw GeoEye satellite imagery?

I have raw GeoEye satellite imagery, I just want some guidelines for creating a strip map with GCP distribution. We need to make orthorectification for raw GeoEye satellite imagery, I think it's ...

GIS Man

1,123

asked Aug 27, 2014 at 10:40

2 votes

0 answers

1k views

Why image do not color match when many Landsat images are mosaicked in ERDAS?

When I try to mosaic Landsat images in ERDAS I get as result image with discordance in colors. I tried histogram matching but no success. The images were captured between March and May.

Lahcen SIG

21

asked May 28, 2014 at 0:22

2 votes

0 answers

686 views

Segmentation Image used to classify RGB image in ERDAS and GIS

My ERDAS 2013 does not have the advanced Image Objective Extension for feature extraction.. I am using thus the tool Image Segmentation (Unsupervised -> Image Segmentation) to classify my RGB image ......

user28538

49

asked Apr 8, 2014 at 8:44

2 votes

0 answers

461 views

Importing GPS coordinates to extract multiple DN values in ERDAS

I have a set of GPS points (stored as a csv for now) and would like to import these points to ERDAS to find the DN values associated with each location. I am able to import a SHP to ERDAS but the ...

Laura

53

asked Jan 17, 2014 at 23:48

2 votes

0 answers

398 views

Extract road defects from terrestrial LiDAR, in Erdas 2012 or ArcGIS10.1

I'd like to extract road defects from a lidar point cloud. So, wherever a road surface drops or raises by a few mm relative to 100 cm around it. I know it's possible but I just can't find or figure ...

GeorgeC

8,298

asked Jun 15, 2013 at 8:08

2 votes

0 answers

446 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 ...

sowparnika

89

asked May 17, 2013 at 8:01

2 votes

0 answers

190 views

How to change the order of a raster in order to create mosaic with MosaicPro (Erdas 9.2)?

Is there a way to reorder the input files so I can control which ones are on top of the others?

diegomatias

309

asked Dec 20, 2012 at 18:04

2 votes

0 answers

432 views

HCS resolution merge (artifacts and dead pixels)

I try to use ATCOR and HCS resolution merge to preprocess urban Worldview-2 data. Applying the HCS algorithm without initial atmospheric/radiometric correction works just fine, but if I apply ATCOR ...

bo ro ha

21

asked Oct 5, 2012 at 9:10

1 vote

0 answers

34 views

Opening .img file created in Erdas Imagine 2023 in Erdas Imagine 2022

I am having an issue working with a file created in Erdas Imagine 2023 in Erdas Imagine 2022. I ran a tool with the output .img. However, the .img format seems to be different in Erdas 2023 vs Erdas ...

Jess

11

asked Sep 9 at 14:11

1 vote

0 answers

200 views

How can I match the colors between the subset and the original image?

I have test subset using an AOI, and I have unchecked the "Ignore zeros in stats." option in the subset dialogue box. The difference in colors may have been cause by the histogram re-...

Shadi Abdelhadi

11

asked Mar 12, 2022 at 10:00

1 vote

0 answers

50 views

Supervised classification in parts

I have an image from 1990 (res 30m, also clouds) for an area equal 2100km2 and when I performed the supervised classification, the software (ERDAS) confuses the classes that look similar. Is it ...

Andrea

11

asked Oct 16, 2021 at 10:30

1 vote

0 answers

216 views

Using ERDAS Imagine 2020 orthophotos

I am dealing with how to figure it out how to export an orthomosaic from my Agisoft Metashape because when I did the merge chunks there. When you merge there, it doesn't provide what I need because of ...

PROBERT

4,139

asked Aug 15, 2021 at 16:41

1 vote

0 answers

205 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 ...

Ahmed Elsayed

33

asked Nov 27, 2019 at 0:07

1 vote

0 answers

158 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 ...

user132874

11

asked Dec 2, 2018 at 20:26

1 vote

0 answers

85 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 ...

Na_Na_Na

131

asked Oct 9, 2018 at 16:49

1 vote

0 answers

135 views

Vector-Viewing Properties on Multipoint Geometric Correction in Erdas Imagine 2014?

I am following some old instructions that are not up to date with my latest version of Erdas Imagine. Where can I find the Vector viewing properties within the Multipoint Geometric Viewer? The ...

Isabella

59

asked Mar 23, 2018 at 8:37

1 vote

0 answers

609 views

landsat 8 images in ERDAS imagine 2014 is not mosaicking properly

I am trying to merge all 4 landsat 8 images in order to create land use land cover map, but its not merging properly.I layerstacked this images before merging. Should i download landsat images which ...

Namitha

85

asked Feb 16, 2018 at 11:48

1 vote

0 answers

38 views

Image displays in 3 RGB stripes across the surface

I layerstacked the Image in the screenshot above, but it is displaying in 3 stripes of RGB. Anyone who knows what the problem could be?

Dominic Njue

11

asked Jan 18, 2018 at 6:16

1 vote

0 answers

411 views

Attribute table shows histogram/pixel count for a thematic raster image, but on enquiring, every pixel's value is zero

I have a thematic raster image containing 18 land use classes (like built-up, water bodies, plantations, forest, etc.). When I display this image in a GIS application (Arcmap/Erdas IMAGINE), the map ...

user3317964

11

asked Dec 8, 2017 at 12:07

1 vote

0 answers

127 views

Atmospheric correction in ENVI, export to ERDAS

I am working on a project using Hyperspectral imagery and have ERDAS Imagine on my home PC and have access to ENVI on another PC at University. Is it possible, for example, to perform the atmospheric ...

sm29

321

asked Jun 9, 2017 at 12:25

1 vote

0 answers

83 views

Make Chessboard stack Image

I am learning some literature of works and came across a beautiful representation of image in chessboard form. That misaligned is not my current concern. We are group of bachelor students and are ...

Anvesh

73

asked May 20, 2017 at 16:38

1 vote

0 answers

439 views

How to do topographic correction of Landsat 8 image in ERDAS?

I am trying to perform a topographic correction of a Landsat 8 image using the C method described in the paper below. I am doing this in ERDAS IMAGINE Spatial Modeler. However, I am not sure how to ...

Simba06

861

asked May 4, 2017 at 14:50

1 vote

0 answers

94 views

Mosaicking landsat imagery before LULC classification

I have to perform change detection of several years for Central Indian Landscape. I have corrected the atmospheric aberrations of the Landsat 8 imageries using the semi-automatic classification plugin ...

Adrian Lyngdoh

355

asked Feb 13, 2017 at 6:38

1 vote

0 answers

197 views

Editing classified image raster in ArcGIS Desktop?

I have an unsupervised classification dataset of a SPOT 6 image created in ERDAS IMAGINE and I now want to edit the class names in ArcGIS Desktop 10.2. I have done this successfully for a number of ...

Simba06

861

asked Feb 1, 2017 at 17:39

1 vote

0 answers

116 views

Classification during DEM generation for Bare Earth Surface-ERDAS

I am using ERDAS photogammetry tools(eATE) to generate a bare earth type DEM from two Pleiades satellite images(pan-sharpened 0.5 cm resolution). I have run the process and the results were just OK. ...

dirt101

11

asked Jan 19, 2017 at 22:05

1 vote

0 answers

267 views

Crop/ forest/grass classification in Erdas

I am trying to calculate crop land, forest and grass land to check the irrigation potential during the period from Landsat 8 image using supervised classification in ERDAS. I am finding difficult to ...

Sanjeev83

11

asked Jul 7, 2016 at 16:04

1 vote

0 answers

248 views

Erdas mosaic producing lots of black space?

I am trying to create an imagery mosaic using erdas imagine. The original files were in a 16 bit DIM Pan-Sharpened format, which produced a completely unusable blank raster (likely an issue with color ...

Benjamin

134

asked May 20, 2016 at 6:02

1 vote

0 answers

89 views

Spectral classification for crops

I'd like to do a classification using a multispectral raster (1 Blue 475, 2 Green 560, 3 Red 668, 4 Red Edge 717, 5 Near IR 840). I'd like to classify the crops (kiwi plants). I tried a few ...

Gary

540

asked Apr 18, 2016 at 21:24

1 vote

0 answers

586 views

How do I make a ratio image on Erdas Imagine 2014?

I have a stacked image but want to divide bands 4/5/. I have built a model on the model maker but the resulting image is completely black after running the model. When I open the attributes table the ...

Jim

11

asked Mar 19, 2016 at 15:24

1 vote

0 answers

69 views

ERDAS IMAGINE: Spatial Modeler Volume Change

Goal: sum of volume change of two DEM; time 1 - time 2 How to insert an AOI/query for certain area How to get visual change of loss and gain?

user67586

11

asked Feb 19, 2016 at 13:55

1 vote

0 answers

83 views

How to create a map showing NDVI result in erdas?

I'm using Spot 5 image to run an NDVI analysis. The band that I used in processing is 4,3,2. The area was 80% covered by mangrove. My problem here how can I create a map to show or present the result? ...

Azliena

9

asked Oct 1, 2015 at 7:36

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