All Questions
Tagged with erdas or erdas-imagine
283 questions
3
votes
1
answer
1k
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 ...
- 31
3
votes
1
answer
63
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 ...
- 61
3
votes
3
answers
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 ...
- 89
3
votes
0
answers
44
views
Empirical Line Method (ELM) in ArcGIS Pro [closed]
My images from 2017, 2018, 2019 and 2020 from the same area, recorded in the same time of the year, all look different regarding colour brightness, likely caused by atmospheric circumstances. As I ...
- 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 ...
- 113
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 ...
- 151
3
votes
3
answers
3k
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 ...
- 31
2
votes
5
answers
8k
views
Creating a Time series NDVI map [closed]
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 ...
- 4,139
2
votes
3
answers
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 ...
- 4,139
2
votes
6
answers
988
views
Looking for simple software to compare two Landsat Images
At uni I used ERDAS imagine to view two rasters at the same time and it had various viewers for comparing them. I'm looking for something that has a slider so that I can see the differences between ...
- 572
2
votes
2
answers
3k
views
Using sieve filter in ERDAS Imagine and/or ArcGIS for Desktop?
Where can i use a sieve filter for my supervised classification?
Can i do it in Erdas Imagine or in ArcGIS?
I can't find it anywhere.
- 21
2
votes
1
answer
14k
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.
- 755
2
votes
2
answers
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 ...
- 209
2
votes
2
answers
5k
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?
- 61
2
votes
1
answer
108
views
Does QGIS have a functionality similar to Flicker in Erdas Imagine?
I am trying to replace an Erdas Imagine workflow with QGIS and I have got most of it working but can't find a solution for fliker. We have it set to turn an image on and off every few seconds to ...
- 8,298
2
votes
1
answer
1k
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 ...
- 1,044
2
votes
1
answer
1k
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://...
- 1,123
2
votes
1
answer
2k
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 ...
- 21
2
votes
2
answers
1k
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 ...
- 37
2
votes
1
answer
243
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
...
- 633
2
votes
1
answer
2k
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?
2
votes
1
answer
2k
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 ...
- 31
2
votes
1
answer
2k
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?...
- 21
2
votes
1
answer
2k
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....
- 4,139
2
votes
3
answers
5k
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 ...
- 53
2
votes
1
answer
723
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 ...
- 579
2
votes
3
answers
3k
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) ...
- 31
2
votes
2
answers
2k
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 ...
- 2,131
2
votes
1
answer
2k
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 ...
2
votes
1
answer
1k
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 ...
- 3,386
2
votes
2
answers
545
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 ...
- 21
2
votes
1
answer
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 ...
- 1,294
2
votes
1
answer
3k
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
votes
1
answer
338
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 ...
- 299
2
votes
1
answer
672
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 ...
- 51
2
votes
2
answers
2k
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 ...
- 92
2
votes
1
answer
1k
views
Accuracy assessment in Erdas imagine
Is it necessary to do an accuracy assessment for an unsupervised classification done for a Landsat 5 image?
- 21
2
votes
1
answer
145
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.
- 8,386
2
votes
1
answer
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?
- 105
2
votes
1
answer
508
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 ...
- 23
2
votes
1
answer
551
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 ...
- 41
2
votes
1
answer
2k
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?
- 446
2
votes
1
answer
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).
...
- 49
2
votes
2
answers
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
1
answer
2k
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 = -...
- 89
2
votes
2
answers
408
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?
- 21
2
votes
1
answer
192
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-((...
- 21
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 ...
- 21
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 ...
- 21
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 ...
- 65