Orthorectification in Erdas imagine 11

[@sumanc27]

How you have obtained Geoeye data? can you suggest some open-access sources?

[@PranayRajG]

sir, i understand that while selecting an image you can attach a text file with the rational polynomial coefficents in it. what i would like to know is, the order of the coefficents. like the first coefficent corresponds to the lat long or height. can you please help me out regarding this? thank you.

[@kanikasikligar]

Do you have any idea as to how to perform Chi-Squared test in erdas for (change detection)

[@AshrafulIslam-cc3lp]

sorry i dont have any idea pertaining to this issue

[@kanikasikligar1100]

Thanks for the tutorial...of great help.I wanted to know if the imagery and DEM should have the same projection ?kindly reply!It's urgent.

[@AshrafulIslam-cc3lp]

yes same projection system is needed

[@jeevankutu6993]

Can't we generate RPC file from any tiff or jpeg image personally??

[@nameerakoser4873]

Can you tell me how to do this using ERDS imagine 2014?

[@estevanlermaingenierotopog5105]

Thanks for the upload, great tutorial... Please, can you explain me what is a RPC file, and how do i get it? Cheers from Colombia

[@AshrafulIslam-cc3lp]

RPC file means rational polynomial coefficients needed for orthorectification, more clearly i would say this particular file belongs few necessary information of a image and you can find this file with your imagery, if you buy imagery the vendor will provide you that file..................

[@estevanlermaingenierotopog5105]

Thank you very much, will do some research on that matter

[@chetansingh3119]

Sir what abt Corona image who dont have RPC?

[@SaZimjon]

ha Hemil baya, what is this?