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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430 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 ...
3
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1answer
53 views

Displaying Raster Source Information

I have a large number of raster files I'm working on. I need to figure out how each of the files was processed from. I have a composite land cover map and would like to view the file names and ...
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3answers
3k views

MODIS image reprojection/ change coordinate system in ArcGIS Desktop?

I have downloaded Utah state shapefile in NAD_1983_UTM_Zone_12N projection and also downloaded the MODIS image of the area (MOD09Q1) in .hdf format which has sinusoidal projection. the .hdf format ...
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0answers
176 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 ...
3
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0answers
218 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 ...
3
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3answers
2k views

NDVI image value changes from -1 to 1 in ENVI to 0-255 in ArcGIS Desktop and ERDAS Imagine?

When i open NDVI image in ENVI, its value is still within the range (-1 to 1). But when I open this NDVI image in ERDAS and ArcGIS Desktop, its value is 0-255. What does it mean? Is the NDVI ...
2
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3answers
1k views

Where to obtain free 15m ASTER image for New Mexico?

I am looking for a free Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) image that will let me to perform NDVI for the pilot crop health/soil moisture that can go as far back ...
2
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1answer
10k views

How to import HDF (L1G) files into ArcGIS for Desktop?

I have downloaded satellite imagery from GLCF website, it has downloaded with .L1G file extension, I am not able to open this file in ArcGIS as well in Erdas, so please let me know how to open this.
2
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1answer
714 views

Existence of fiducials marks in a digital camera file

Existence of fiducials marks in a digital camera file I have created a generic digital camera file using Erdas 2015 with the following data in it: LPS Camera File Version: 2.0 Camera Name: "generic ...
2
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1answer
607 views

Is possible to merge landsat 8 with High Resolution Satellite Imagery?

i have landsat8 and High Resolution Imagery (1m) in the same study area, is possible to merge them to get one imagery so that i can take advantage of the accuracy satellite imagery. some_text http://...
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1answer
1k views

Using Erdas for land cover land use change detection

New to Erdas but I have to do a project and I have chosen to do a landcover land change detection. I have two Landsat 5 images, five years apart from each other. What is my next step? I imagine I ...
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2answers
3k views

Floating point to 8-bit unsigned raster conversion using ArcGIS for Desktop or ERDAS IMAGINE?

I have an image with value ranging from -1 to +1. I want to convert this into 0-255 (8bit). How can this be done using ArcGIS for Desktop or ERDAS IMAGINE?
2
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1answer
1k views

Calculating NDWI in Erdas IMAGINE 2014

I'm using MOD09GQ product of MODIS to calculate vegetation indices in Erdas 2014, and I was able to extract NDVI using Erdas Model Builder. What is the formula I should use in model builder for ...
2
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1answer
1k views

What exactly does hill shade or Shaded relief , if performed on SRTM DEM will output?

Two questions actually. Does shaded relief or hill shade outputs mean "expelling of shadows"? For a vast country like India, how to prepare a map from SRTM DEM, which does not have any shadow effects?...
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1answer
1k views

How to remove band from stack in ERDAS 2013?

I have a Landsat 8 scene where I have stacked 11 bands. I need to remove one band from the stacked layer. Is there a toolbox in ERDAS 2013 that allows me to take out a band? I am aware that ENVI 5....
2
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2answers
746 views

How to derive the slope angle value from DEM?

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 ...
2
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3answers
4k views

Atmospheric correction for Landsat 8 in ERDAS?

I am attempting to run some classification on Landsat 8 imagery, however, I need to perform atmospheric correction on the images in order to reveal true spectral signatures. I am using ERDAS, and the ...
2
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2answers
131 views

Searching for LANDSAT for the state of New Mexico

I am looking for a website that allows me to download free LANDSAT for all of the State of New Mexico. I need them to perform my work on RUSLE and need LANDSAT for c factor. Does anyone suggest of a ...
2
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1answer
695 views

Importing ERDAS-processed GTOP030 dem data into ArcGIS Desktop?

I have two GTOP030 DEM images. After downloading them, I have imported into ERDAS and mosaiced them. Then I have exported it to .tif file in order to open it in ARCGIS. But when I tried to open it in ...
2
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3answers
171 views

How to assign mean values from different windows sizes to point feature?

I have points overlaid on an elevation raster as shown below; The aim is to get mean value of each point computed from 3x3 window size covering its immediate neighbouring pixels. It will be ...
2
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3answers
2k views

What preprocessing is required when using Landsat for LULC?

Can anyone help me regarding the what kind of image pre-processing techniques should be used for the landsat images downloaded from http://earthexplorer.usgs.gov/ to create land-use land-cover (LULC) ...
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2answers
1k views

land Use land cover classification

I am working on Land Use/Land Cover Classification of the Hindon river(India) watershed extracted using Aster DEM. Landsat 8 scenes had been used and mosaicked for the required AOI using the Watershed ...
2
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2answers
606 views

ERROR 1: None of ECW_ENCODE_KEY and ECW_ENCODE_COMPANY were provided

I downloaded ERDAS-ECW_JPEG_2000_SDK-5.1.1 and tried to use it with GDAL to create ECW files from georeferenced PNG files, but they are not created, it basically complains about: ERROR 1: None of ...
2
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1answer
961 views

Possible to use same signature file to classify images from different years? [closed]

I have Landsat images for the same area over 20 years (one photo per year in same season). I would like to detect changes occured in forested area like clear-cut and bark beetle outbreak over time. I ...
2
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2answers
512 views

Normalizing landsat image pixels prior to classification?

I have 5 different years (all in the same month) of Landsat TM imagery to perform classification on and I would like to know whether there is a technique to normalise the pixels in each image so my ...
2
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1answer
2k views

Formula for Enhanced Vegetation Index (EVI) in ERDAS modelbuilder?

I am trying to derive Enhanced Vegetation Index (EVI) from Landsat 5 TM data using ERDAS model builder.d I can't seem to get the output I want as it comes out blank. This is the formula that I used:...
2
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1answer
332 views

ERDAS 2011 and OpenOffice

Is it possible to connect ERDAS 2011 with tools of OpenOffice instead of Office tools? I need to send a map composition made in ERDAS to Presentation of OpenOffice. I don't have Word or Power Point ...
2
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1answer
70 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 ...
2
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2answers
753 views

GDAL, Python, pyramids/statistics read/write

As I work through learning programing with raster imagery, I am trying to read in a raster, change the pixel values and write the output file. Below is the code. I have blocked out the change pixel ...
2
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1answer
105 views

How to load Erdas .img files into Whitebox?

Just installed Whitebox 3.2.3 and I'd like to import a 14 MB.img file. The data import options do not list .img as a file source. A web search has also turned up nothing.
2
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2answers
2k views

How to atmospherically correct Landsat 8 data?

What is a simple way to atmospherically correct Landsat 8 data using Erdas 9.3 or ArcGIS 9.3?
2
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1answer
120 views

How to create an image of maximum pixel values from an input layer-stack image in ERDAS Imagine?

I have 12 MODIS images (one of each month). I want to create a single image having maximum annual pixel values for each pixel. I did layer stacking operation in Erdas Imagine 13, but how to extract ...
2
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1answer
478 views

Batch unsupervised classification with ERDAS 2011

I work with Erdas Imagine 2011. I would like to do an unsupervised classification and vectorization on 100 Landsat images (.tif). CC_2014_1.tif CC_2014_2.tif CC_2014_3.tif etc However, I am new in ...
2
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1answer
433 views

same RMS error for different resolution data

if i rectify a low resolution data and high resolution data and both have same RMS error =1 then what would be rectify more accurately? means for which resolution this error is more acceptable ...
2
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1answer
2k views

Stacking overlapping rasters, keeping cell values on top?

I have a land cover classification that consists of three files. One file is the LCC for the western half of my study area, another covers the eastern half (these two overlap in the middle), and the ...
2
votes
1answer
1k views

split multi-band raster to separate rasters in ERDAS IMAGINE

I am currently using ERDAS IMAGINE 2013. I have a 28 Band MODIS image. Is there any way in IMAGINE I could split the 28 bands of the MODIS image into single band images?
2
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1answer
1k views

Segmentation - problem with mosaic tiles

Could you please tell me how to solve my problem with segmentation in ERDAS ? I am using ERDAS 2013 and the tool Image Segmentation to segment my multiband picture (with high resolution). ...
2
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2answers
2k views

NoData Value = 0, problem when creating NDVI, Erdas

I try to create an NDVI from Landsat and ASTER satellite images using Erdas Imagine. In Erdas, the satellite images have a nodata value of 0. After creating an NDVI, the nodata value is still 0, but ...
2
votes
1answer
1k 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 = -...
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2answers
376 views

Shoreline identification using ERDAS 2011

How can we separate shoreline from shallow water sea and land area in a LISS 3 image using ERDAS 2011 software?
2
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1answer
172 views

crust index in Erdas Imagine

hey people, i have the trouble with CI index in Erdas, when i am useing the image from landsat 5 tm with atmospheric correction it gives me the whole white picture in the results, the formula CI=1-((...
2
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1answer
256 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 ...
2
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0answers
90 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 ...
2
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0answers
199 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. ...
2
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1answer
712 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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0answers
209 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. ...
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0answers
48 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 ...
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0answers
380 views

Large Rasters in ArcGIS & MapInfo [closed]

My geoscientists like to work with MapInfo and ArcGIS. I require a common 1 band raster format that can hold obscene amounts of data without damaging the data (compression). I have tried .tif and ...
2
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0answers
188 views

Oriented stereopair in ERDAS [closed]

I am trying to orient a set of intensity LiDAR images in ERDAS Stereoanalyst for stereo digitizing. The set is consisted of an intensity image and its stereomate. Stereoanalyst is configured for ...
2
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0answers
358 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 ...