A remote sensing and GIS software.

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1
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1answer
137 views

How can I multiply each band of multiband image by separate scalars?

I have an image with 5 bands. I need to multiply each band of this image by different scalars one time (I'm lazy to do it one by one) and then get multiband image as a output. For example ...
1
vote
1answer
98 views

How to recode bands in which max value occur?

I have 2 raster images; ras1 (an image with max value) and ras2 (an image with 5 bands). Basically. ras1 image extracted from ras2 images. I'd like to find bands from ras2 in which max value occur and ...
2
votes
0answers
48 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?
2
votes
1answer
406 views

MOD 35 Cloud Mask HDF in ENVI

I am having difficulty getting ERDAS or ENVI to correctly read and display cloud mask attributes from MOD 35 HDF files. They files are displayed as 0-255, whereas I expected some kind of code 0, 1, ...
10
votes
1answer
758 views

How to Remove Dark Bands Where Scenes Overlap in Mosaic Landsat TM5 Image?

I have an image mosaic of 5 Landsat TM5 scenes. Where the scenes overlap there is a dark band, only on the left and right sides, but the top and bottom are seamless. What is the best way to correct ...
1
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0answers
177 views

What does “unit name Degrees not found” error mean in ERDAS?

I want to create a mosaic in Erdas. When I want to add an image file in the Mosaic Tool interface in Erdas, Erdas showed me the error saying "unit name Degrees not found". Then I tried to change the ...
0
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0answers
326 views

ECW Compression Engine Error in ERDAS Imagine

We have some IMGs that we're trying to convert to ECWs with the fourth band activated to mask the wretched black null data borders. The instructions we got from ERDAS were to create an AOI and export ...
4
votes
2answers
156 views

What Information Does the Blue Band Provide?

I am playing around with ERDAS and was implementing image difference on two rasters separated by interval of time. I was using a blue band raster and I created a default threshold for percentage ...
0
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1answer
174 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 ...
2
votes
0answers
157 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 ...
6
votes
1answer
326 views

How to remove clouds in High resolution Imagery(.5 mGeoeye)

i have imagery with high resolution .5m, large parts covered with clouds,so it's obscure many urban areas. thank you.
0
votes
1answer
430 views

“Display Background value ”0“ raster”

While publish raster layer in geoserver it shows background as black. How to remove the black color. if there is any options to permanently remove the black color.
1
vote
2answers
458 views

how to remove the color formed on the edge of satellite image?

my AOI requires two scene of satellite image but when I try to mosaic the images using ERDAS imagine, the color of the edge is seen forming black line after mosaic! so please how can I remove the ...
1
vote
1answer
306 views

ERDAS Imagine batch wizard edit replacement pattern help

I'm using ERDAS Imagine to batch produce NDVIs from NAIP imagery. I need to also replace the default file name (e.g. "m_3610132_nw_14_1_20100503") with a user friendly file name (e.g. 3610132nw). ...
2
votes
0answers
286 views

ERDAS Imagine: negative z-coordinates for automatically set tie points

I'm a new ERDAS Imagine user, so it's probably a beginner problem I'm facing: I get negative elevations in my DTM after automatic tie points setting.. I am geo-referencing a stereo-pair of ASTER ...
3
votes
1answer
304 views

Cloud and Snow Differentiation

I am doing unsupervised classification of a mountaneous terrain and I have used 500 classes to classify the land use. In my result, cloud and the snow are categorized in the same class. How do I ...
7
votes
5answers
3k views

Large mosaic process failing - what are the options? software independent only focussed on result

I need to mosaic about 550Gb of tif imagery together and the software I have tried keeps failing. The area has been split into zones so that the smallest has approx 200 tiles. I have used the latest ...
3
votes
3answers
773 views

How to add a raster legend with min/max values in QGIS 1.6?

I calculated/made NDVI with landsat data using ERDAS. Results of NDVI is in black and white map but I need it in colour to present the scale for NDVI with value of pixels in Map Composition. How to ...
2
votes
1answer
279 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 ...
3
votes
2answers
4k views

Replacing Raster Values in Ras1 with Ras2

I have two rasters Ras1 and Ras2. I want to change the Ras1. In Ras1, there are few areas, lines, points I am interested having nodata cells and wrong data cells.(limited to interested areas only ...
5
votes
3answers
1k views

How to convert orthophotomap to .ecw file?

I am looking for a method for convert orthophotomap (.adf files) to ERDAS .ecw file. Have you got any ideas ? Or maybe you have got any other idea how i can reduce a size of orthophotomap .adf ...
5
votes
1answer
645 views

Setting “REAL” work/scratch workspace in ESRI/ERDAS etc

I thought the issue was only in ARCGIS but it seems that ERDAS does the same thing. I have my C with 1.7TB and my D with 10TB and my scratch set to d:\scratch but still ERDAS (and ESRI) fills my ...
5
votes
5answers
943 views

georeferencing aerial photos with only known centroid

I have heaps of aerial photos that need to be georeferenced. I have access to ArcMap and ERDAS. All I am given is an excel sheet with the centroid coordinates of each image. Each photo covers an ...
0
votes
1answer
360 views

NDVI image value

In order to get monthly NDVI image with max value from two 16 day-images, I used mosaick tool in ERDAS8.7 by choosing max function from "set overlap function" tool. But after doing this, when I see ...
3
votes
3answers
1k views

Problem with NDVI image value

I'm really happy to find this website. It is very helpful for the learners of Arcgis. Now I wanna ask a question. When i open NDVI image in ENVI, its value is still within the range (-1 to 1). But ...
2
votes
5answers
2k views

Is there any batch process to get a single band image from stacked image

Can you help me to extract a single band image from stacked multiband image. Totally, 260 image has been stacked. When I do to this, it will take a long time. So I'd like to know there is any batch ...
3
votes
2answers
2k views

How to create an animation from raster data?

I have some NDVI and precipitation/temperature images at the monthly time step from Jan, 2005 to Dec, 2008. I need to create animation image to show the temporal change. How can I do this. Is it ...
-2
votes
1answer
868 views

Image classification [closed]

How can I do classification based on NDVI image. What kind of process and model can do it? Thanks a lot
2
votes
4answers
489 views

Extraction of monthly image from two-16 day images

I need to conbine two-16 day NDVI image into monthly NDVI image. To do this, what kind of function and formula are used in ENVI, ARCGIS or ERDAS? Best regards,
5
votes
3answers
2k views

resize image resolution from 1000 m to 250 m

I'm beginner of ARCGIS and RS. I have many problems with the procedure. One of them is I have NDVI images and Soil map. Both are at the different resolution: NDVI is 250 m. soil map is 1000 m. So I ...
1
vote
1answer
436 views

Importing ERDAS-processed GTOP030 dem data into ARCGIS

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
votes
1answer
126 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 ...
7
votes
1answer
611 views

How can I change the class of one pixel in a classified image?

I have a classified image (I did it in ERDAS) with six categories. There are some misclassified pixels (especially high-density urban category). Is there any way that I can choose one pixel and then ...