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

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265 views

georeference IMG file in qgis

I have a problem: I'm trying to georeference a satellite image (ASTER, Erdas Imagine file *.img) in QGis. I have georeferenced with QGis before and never had any problems. The file is georeferenced ...
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1answer
6 views

Question about ERDAS TOC

On occasionally when I open a raster in ERDAS 2013, I get white or yellow circle icons on my ERDAS Contents and tried to find information on ERDAS. I want to know what does the icon mean ? Thanks ...
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1answer
94 views

Using Mosaicking Images in Erdas software

Do you know any dissertation which has written about Mosaic briefly? I did the Mosaic for my Landsat images but i want to explain and write about but i do not know how and what shall i write about it ...
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1answer
154 views

How to make Mapnik render Erdas images in RGB instead of grayscale?

I have some orthophoto files (Erdas Imagine format) enclosed in a vrt file. When I view it in any desktop GIS it has proper RGB colors, but when I use the vrt in Mapnik to render some tiles, I get ...
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0answers
383 views

Why is GDAL ECW compression much poorer than ECW compression from ERDAS

We use ECW compressor shipped with ERDAS Imagine to export Orthoimagery for our different departments. Because we are facing problems with the Imagine license server, we had to choose GDAL (built with ...
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0answers
271 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 ...
2
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0answers
49 views

add equalized number of random points in ERDAS

I would like to ask you how to generate an equalized number of random points in Erdas Imagine 2013 for doing an accuracy assessement. I did an image difference (thematic layer, produces 5 ...
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0answers
264 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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0answers
105 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 ...
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0answers
93 views

Error when converting .shp to .dxf

I have created a polygon shape file in Erdas Imagine 9.2 from a raster image. I want to export it to .dxf or .dgn for further processing. When I export the .shp to .dxf in Global Mapper, large ...
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0answers
71 views

How do you convert an Imagine raster attribute value into the raster value?

I have a raster derived from image segments with row id as the value. I have an attribute in the attribute table which should be the raster value, "Standard deviation layer 5" (see image). How do I ...
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0answers
7 views

ERDAS Imagine ecw compression settings

We have some jp2 or img satellite images that we compress to .ecw using ERDAS Imagine. We have realized that with some images we are losing too much information while doing that. What i wanted to ask ...
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0answers
29 views

ERDAS Imagine 2013 NDVI fail

i have a problem with NDVI in Erdas Imagine. Instead of NDVI image it makes a mask, which is not suppose to make. Do anyone know where the problem is?
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0answers
66 views

How to identify DSM anomaly using Erdas Imagine

I am having IFSAR DSM. I want to detect anomaly (both Spikes and depressions) to fix in the process of DTM editing. Since the file is too large I chose automation for the process of detection. I tried ...
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0answers
26 views

Erdas hot keys to toggle layers

Is there a way to toggle image layers with the use of a hotkey? I prefer to flicker layers for change detection with hot keys