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

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23 views

How to match colours in already mosaiced single image?

I have an already mosaiced image for a large area. I need to match colours in this single image. I do not have each image separately. I just have this large single image downloaded from GLS. How can I ...
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1answer
16 views

Converting data type in ERDAS IMAGINE and ArcGIS for Desktop?

My tif image data type is float (i.e. my data is between -1 to +1) and I want to convert it into 8bit unsigned integer. I used ERDAS IMAGINE import tool to do this, while converting it into img also. ...
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0answers
6 views

Imagine 2014 displaying images with large no-data values

I'm starting to use Imagine 2014 after a recent upgrade. The images I'm using have data values in the range of approximately -.02 to 350.0. The no-data values bordering the data has a value of 2 ...
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2answers
72 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?
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1answer
28 views

How to display the one band layer in pseudocolor using ERDAS Imagine?

I am a new user in ERDAS imagine and i found it hard to turn the single band raster data from grey color to pseudocolor using ERDAS imagine. This process could be easier to be performed using ER ...
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14 views

Problem of importing signature files from stacked dataset of Landsat 8

I tried importing a signature file using the AOI file from a stacked image of 16 bands of Landsat 8 on ERDAS 9.1. Its just not happening. Error message says "statistics info not found". However a ...
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0answers
19 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 ...
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0answers
78 views

Calculating TOA reflectance from Radiance using Erdas Imagine for a Spot2 image

Using the SPOT equation ρ = π L/[E cos (θs) d-²] to calculate TOA reflectance from Radiance. L was calculated using this equation [L = (X/A) + B] d was calculated by converting date to julian day ...
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0answers
22 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 ...
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28 views

IMG and geoTIFF raster extraction

everyone. I'm very new to GIS technologies. Somehow, i need to extract raster(RGB data) data from geoTIFF and IMG files. What is the fastest way doing it?
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1answer
57 views

Erdas Imagine DN to TOA reflectance for SPOT images

I would like to convet DN to TOA reflectance in Erdas Imagine 2013. I see there is a way of doing this for Landsat7 in the Radiometric tab. How can I do this for SPOT2,4,5 images?
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25 views

Water grey levels - remote sensing

by viewing two bands in erdas imagine the grey levels of the water differ. on the one image as below the water is dark and the other image the water is light. why is that? what cause the ...
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1answer
38 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?
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2answers
60 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 ...
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0answers
81 views

Creating batch file from ERDAS IMAGINE Spatial Modeler?

How to create batch file from the ERDAS IMAGINE Spatial Modeler? I want to do the same process to different input images, something similar which we can do by batch processing of the existing ...
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1answer
37 views

create a vegetation mask using Landsat 7 [closed]

I'm working on a very large study area. The aim is to create a vegetation mask representing only pines. I'm using Landsat 7 images. Since the recordings were made in the winter it's pretty easy to ...
7
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1answer
132 views

What are the pros and cons of forcing square pixels on reprojection?

I am using Erdas Imagine 2014 to reproject 4-band raster data from GRS 1980 NAD83 Lambert Conformal Conic (ft) to UTM GRS 1980 NAD83 North UTM Zone 11 (m). Unlike ArcGIS, Erdas provides the option to ...
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1answer
61 views

How to rescale data ranges in ERDAS?

I have an Normalized Difference Vegetation Index(NDVI) and Enhanced vegetation index (EVI) layer and I want to re-scale their data ranges to value ranges from 0–to–1, in order to optimally stretch the ...
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1answer
29 views

Problems using ATCOR for Erdas Imagine '13

An output from ATCOR processing (besides an atmospheric correction and dehazing) is expected to be an image containing true reflectance values (instead of raw input DNs). As far as I know such data ...
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1answer
92 views

Erdas python scripting help

I want to write scripts for Erdas in Python. I downloaded some Python examples here but I could not make much. Where can I get the full Help material for Erdas python scripting?
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1answer
83 views

How to create an Erdas batch list file (.bls) using Python?

How can I generate the Erdas batch list file (.blf) using Python? For example, I want to run a 5x5 median filter in the Batch Command Editor using a subset of images within a folder. Erdas provides ...
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1answer
30 views

Creating training areas for parametric classifcation

I am creating a signature file for a supervised classification for a subset of a LANDSAT image. I know what classes I would like to create, and have identified ideal areas for training. However, I am ...
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16 views

MODIS MOD13Q1 extract ndvi value [duplicate]

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 IMAGINE 9.1 & ENVI 4.7. ...
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1answer
119 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 & evni 4.7. Can you ...
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69 views

Conversion problem of projection of MODIS LAI from sinusoidal to geographic

I am trying to change MODIS data's (LAI) sinusoidal projection to geographic. Actually I did it. But when I reproject it by ERDAS, the output LAI raster moved about 10 km to west side of actual shape ...
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1answer
45 views

How to remove sandy dots in an image?

I am processing a LandSAT image for geological purposes. After some processing there are so many sandy dots in the image. To get clear geological formation as a polygon I want to remove small sandy ...
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1answer
39 views

how to multiply and group values of NDVI in Erdas

I have downloaded the MODIS data for calculating the NDVi but the ranges of values in its attribute table ranges from -32768 to 9830 i want to club the similar values upto 2 decimal places and also ...
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0answers
25 views

unwanted pixel removal in the image [duplicate]

I am processing an image in Erdas Imagine, there are some small unwanted pixels that I want to remove automatically. Is there any way to do so?
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0answers
22 views

Vectorized a historical soil map advice

I received a PDF file of a soil map in the Middle Rio Grande Valley near Albuquerque, New Mexico however it is dated in 1914. I was able to split the north and south because it came in one map and ...
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40 views

Grouping of NDVI values in erdas Imagine

I am trying to extract NDVI values from MODIS image i have image of my study area, when i look at the attribute values of image in Erdas i get the value ranging from -32768 to 9820, I want to create ...
2
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1answer
42 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 ...
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45 views

Script to stack multiple landsat bands in different folders

I wanted to find out if there is a possible script I could use to stack landsat bands into a single image, and then apply that stack command to multiple folders (I have about 100 landsat scenes that ...
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4answers
200 views

Determining which “color” each image band represents?

I have a satellite image that has a few bands in it. But I don't know what colors they are supposed to represent, nor do I know where to look for this information--the file's metadata say nothing ...
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29 views

change raster values in a specific region on a single band

I am currently using ERDAS IMAGINE 2013. I have a 28 Band MODIS image. In one of the bands, I need to change the values of a certain region. I tried the following: Load the .img file into IMAGINE. ...
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72 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?
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43 views

Layer stacking in ERDAS?

When I am doing layer stacking of the liss iv image and ndvi generated from the same image, the output generated is white (flat) in ERDAS Imagine. How to solve the problem?
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0answers
68 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.
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0answers
151 views

Use a 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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1answer
26 views

Which format is more convenient to publish in Erdas Apollo?

I am from Bolivia and I need to publish some Satellite images in Erdas Apollo. My question is Which format is more convenient for publish in this software?, because I have Landsat5 TM images in TIFF ...
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0answers
21 views

Determine sun elevation without header file?

I have some AWiFS and LISS-III data that I'm trying to convert from at-sensor spectral radiance to top-of-atmosphere reflectance. The problem is, the data didn't come with any header file. All I ...
4
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1answer
190 views

Methods of cloud shadow detection for Landsat data?

Detecting clouds doesn't seem to be much of a problem, rather the challenge is in selecting cloud-shadow classes that don't also include coastal areas, agriculture, etc. For a project I'm working on, ...
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1answer
47 views

Running Erdas command in MS-DOS

I have generated the following command line in ERDAS, and want to run it in MS-DOS. Getting an error- "system cannot find the path specified". I have checked the path by opening it in windows ...
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20 views

Which georeferencing method for Himalayan Awifs-Awifs registration

I would like to know which georeferencing method would provide the best result for Himalayan region in-case of Awifs(Raw) to Awifs(master) georeferencing.. I have already tried polynomial ...
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1answer
42 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
241 views

Digital Number (DN) on satellite imagery? [closed]

How would I know if any of the satellite imagery (Landsat, ASTER, Quickbird and so on) have DN or Digital Numbers such as integer or uninteger on its pixel. I download from the USGS EarthExplorer and ...
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0answers
22 views

GeoEyes stereo Image

We have 4 stereo GeoEyes images. We work with ErdasImagine 2014 when we generate a blk file after reading the images we see this error: "Unsupported Compression type". Please help us. Best Regards
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82 views

MODIS MOD09A1 processing

modis state flag for MOD09A1 data (Surface Reflectance 8-Day L3 Global 500m) is different for each 8 day composite. I have 10 years data how to extract the cloud information in batch? and is their any ...
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4answers
722 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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1answer
101 views

How to export raster value into excel or ASCII [duplicate]

I'd like to get all pixel values of time series NDVI image to find regression coefficient to smooth the abnormal NDVI value through the time. So that firstly, I want to export values of raster into ...
0
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1answer
56 views

Is there any method to choose the value of each pixel according to land cover

I have 2 images; one is land cover image (imgA) and monthly mean temperature image (imgB). I'd like to choose value of each pixel from imgB corresponding to imgA. WhaT I expected is each pixel of ...