|
|
| GeoCommunity Mailing List |
| |
| Mailing List Archives |
| Subject: | [gislist] Orthoimagery |
| Date: |
05/07/2004 01:55:01 PM |
| From: |
Eric Sandoval |
|
|
Hello Listers:
I have a question for the orthoimagery experts out there. We have imagery that exhibits substantial radiometric inconsistencies. Our imagery was flown at 1:400 scale or 6 inch resolution. The various flight lines were merged and then were processed to choose the best image based on sun angle, clarity,etc. The images were then color balanced.
Our problem: Along the seems of our imagery a distinct difference can be seen. On one side of the seem the ground features will appear clear and on the other side they appear fuzzy. We were told by the survey company that these differences were the result of different flight lines. The difference in contrast, clarity and sharpness are a function of flight lines were taken at different times of the day and the position of the features. Some features are on the outer portion of the flight line and therefore exhibit lean due to camera angle. Flight lines were planned with a standard 60/30 overlap.
My question: Can't these problems be resolved through processing or surveying additional flight lines? I understand it's unreasonable to acquire additional flight lines after the initial survey (cost prohibitive), but couldn't additional flight lines been planned if these problems were known in advance (which they were)? Does this type of problem occur in all orthoimagery?
Any insight or comments that you can provide would be most appreciated.
Thank you,
-Eric Sandoval
---------------------------------
Do you Yahoo!?
Win a $20,000 Career Makeover at Yahoo! HotJobs
_______________________________________________
gislist mailing list
gislist@lists.geocomm.com
http://lists.geocomm.com/mailman/listinfo/gislist
_________________________________
This list is brought to you by
The GeoCommunity
http://www.geocomm.com/
Get Access to the latest GIS & Geospatial Industry RFPs and bids
http://www.geobids.com
|
|
Sponsored by:
For information
regarding
advertising rates
Click Here!
|
