| Re: Problems with hires maps with IDL v4.0.1 [message #4961 is a reply to message #4920] |
Wed, 06 September 1995 00:00  |
frank
Messages: 15
Registered: August 1993
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Junior Member |
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Here are some more strange features (?) of the hires maps.
The coastlines apparantly contains more information than
is ever lectured in a geography class!
I keep finding unexisting (?) coastlnes spread out across the world.
Some island and lakes have double lines.
Several open contours exists.
Are there errors in the CIA database?
Check out the double stitched islands:
window,0,xsize=700,ysize=700,retain=2
map_set,/merc,limit=[-23, 54, -18, 59],/grid
map_continents, /hires, /coast
Or this strange mosaic :
window,0,xsize=700,ysize=700,retain=2
map_set,/merc,limit=[-75, -80, -70, -70], /grid
map_continents, /hires, /coast
Or these numerous open lines in the south-east part of
the Red Sea:
window,0,xsize=700,ysize=700,retain=2
map_set,/merc,limit=[15, 40, 20, 43], /grid
map_continents, /hires, /coast
There are several more examples of these three effects.
What's going on ?
(BTW: IDL 4.0, SGI IRIX 5.3)
If we can't trust CIA, who CAN we trust?
--
/* Frank J. �ynes -------------------- (frank@spacetec.no) */
/* Spacetec a.s */
/* Prestvannveien 38, N-9005 Troms�, Norway */
/* Telephone : +47 77 68 45 00 Telefax: +47 77 65 58 59 */
/* (...with the bravery of being out of range!) */
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