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| GeoCommunity Mailing List |
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| Mailing List Archives |
| Subject: | GISList: contours and photo scale |
| Date: |
07/03/2002 11:01:33 PM |
| From: |
jayachandran mani |
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Hi all,
Few more clarifications. Is it possible to create
contours of 1 m interval from aerial photographs of 1
: 8000 or 1 : 10,000 scale through photogrammetric
methods. Digitally, we can create contours / DEM to
any interval through interpolation techniques. Will it
be possible to get the accuracy of the required
accuracy (line and height accuracy) corresponding to
the 1 m contour interval.
I understand that for creating contours of 1 m, DEM
should be of 5 m interval to get the required accuracy
and it may be possible to create such with photographs
of around 1 : 5000 scale.
Any suggestions / clarifications in this context are
welcome. Also more reference to the accuracy standards
of contours / DEM with respect to the photo scale may
also be helpful
Thanks for the help all times.
Regards
Jay
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