Dear All, I new user of RS softwares. I have downloaded two landsat TM images from USGS in different UTM (36 and 37) and may have different years. They were not specified as mosaic images by USGS but I checked both...

Aniti

Dear All,

I new user of RS softwares. I have downloaded two landsat TM images from USGS in different UTM (36 and 37) and may have different years. They were not specified as mosaic images by USGS but I checked both images have a common area. Today is the fourth day I spent to mosaic these images but I couldn’t. I tried arcgis and idrisi. . Idrisi told me that the images have no the same spatialreference. ArcGis gave me distorted mosaic. the sattlite images have black background which makes them even more difficult to me to mosaic. i reformat raster to grid, raster to float etc. but nothing

I need you help please?

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replied to: Aniti

cxh1216

Replied to: Dear All, I new user of RS softwares. I have...

"the images have no the same spatial reference." This should be the problem. you have to convert them to the same spatial project system. Maybe you are not familiar with the project system.

Here, I would like to suggest you to use ENVI /IDL, which can mosaic images with different project system. It maybe expensive, but can not be more expensive than ArcGIS in my idea.

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replied to: Aniti

rodica

Replied to: Dear All, I new user of RS softwares. I have...

I also had some difficulties with the black background, a professor told me to do ignore 0 in statistics, usually when u run the models for the atmospheric corrections. This is if u work with ERDAS. if u got other solution happy to hear about.
good luck

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