Polynomial Calibration in Oziexplorer

Submitted: Wednesday, Apr 04, 2007 at 21:49

ThreadID: 44004 Views:2213 Replies:3 FollowUps:4

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equinox

I want to calibrate a screen shot from google earth into Oziexplorer.

Unfortunatley there are not too many accurate points I can calibrate the image with. Maybe a few sandridges and merging dry creeks at best. Some of these are of questionable calibration worthiness.

In the help notes on polynomial calibration it says it can be used when the map projection is not known.

Can this work the other way in my favour, by "averaging" out the calibration points, even discounting to a certain extent calibration points of questionable accuracy?

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Reply By: Richard Kovac - Wednesday, Apr 04, 2007 at 22:04

Wednesday, Apr 04, 2007 at 22:04

Try e-mailing Des,

I have before and he is very helpful if not a little sort...

Richard

AnswerID: 231710

Follow Up By: equinox - Wednesday, Apr 04, 2007 at 22:26

Wednesday, Apr 04, 2007 at 22:26

Thanks mate,
Have done!
Cheers

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FollowupID: 492687

Reply By: wdric - Thursday, Apr 05, 2007 at 06:26

Thursday, Apr 05, 2007 at 06:26

Try doing a google search for this program GoogleMV

I have used it to download & calibrate google images.

It works like a teat on small images size 10km x 10 km

But i have not had any luck with bigger

AnswerID: 231734

Follow Up By: equinox - Friday, Apr 06, 2007 at 14:01

Friday, Apr 06, 2007 at 14:01

Thanks wdric, will have a look for it.

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FollowupID: 492913

Reply By: age - Thursday, Apr 05, 2007 at 07:06

Thursday, Apr 05, 2007 at 07:06

Equinox

Why not drop some "pin or place of interest" markers onto your screen image in google earth before you take the screen shot. I know they look a bit funny with the pin symbol, but place them in the corners and you will not notice them too much. Note the co-ordinates of them from the google earth tool bar when you drop them. Take your screen shot (I would actually export and save the image) and then when calibrating and asked to key in reference points just hover back over your pin markers and key in the relevant coordinates from your notes taken from google earth. Will be as accurate as you are going to get it.

Thanks

A

AnswerID: 231737