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<DIV><FONT size=2>Dear Sir Hamish, Nathaniel Vaughn Kelso</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Thank you for your help.</FONT></DIV>
<DIV><FONT size=2>I tried several times by following Mr.Hamishs
advice.</FONT></DIV>
<DIV> >g.region rast=map_name<BR> >will zoom to the extent of
the map, and to the map's resolution.<BR> >Also try using 'd.barscale'
to make sure the map scale it correct.<BR> >If you used v.digit to mark
the outline of the lake you could use<BR> >'d.what.vect' to query the
area too.</DIV>
<DIV><FONT face="MS UI Gothic" size=2></FONT> </DIV>
<DIV><FONT face="MS UI Gothic" size=2>But still got the same
results.</FONT></DIV>
<DIV><FONT face="MS UI Gothic" size=2>So I am going to accepte <FONT
face="Times New Roman">Nathaniel Vaughn Kelsos advice,</FONT></FONT></DIV>
<DIV><FONT size=2>and multiply the resultes by 1000 and uses those as my area
data.</FONT></DIV>
<DIV><FONT size=2>But still want to know what caused this kind of
problem.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>If any one knows about this, Please, give me some
advice.</FONT></DIV>
<DIV><FONT size=2>Heartfully Thanks.</FONT></DIV>
<DIV><FONT size=2>Sincerely</FONT></DIV>
<DIV><FONT size=2>Ghalip Yasin<BR></FONT><FONT face="MS UI Gothic"
size=2></FONT></DIV>
<DIV><FONT face="MS UI Gothic" size=2>My Problem:</FONT></DIV>
<DIV><FONT size=2>> I " i.rectify"ed and got several different seasons map in
target XY<BR>> location, and "r.digit"ed a lake area respectivly.<BR>>
After these I entered command "r.report" for each map and see the
results.<BR>> It goes very pretty and gives me following results.<BR>> For
map2 (2001.09.25): 1/lake area...0.623 km^2<BR>> For map1 (2002.10.30):
1/lake area...0.928 km^2<BR>> For map3 (2003.05.25): 1/lake area...1.125
km^2<BR>> But the problem is the results were much smaller than the real
area.<BR>> The real area of this lake was changed from 500km2 to 1200km2 in
these 5 years.<BR>> So my question is: why r.report gives me the wrong
figured area data?<BR></FONT></DIV>
<DIV><FONT size=2><BR></FONT></DIV>
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