The JHU/APL Digital Relief Map of the US
Index image for version 1 of the digital map
In January 1994 I placed on our ftp site a series of
GIF images containing 5x5 degree sections of a color
shaded relief map of the United States and announced
it in the news group sci.geology. This map came
to be known as the JHU/APL Digital Relief Map of the US.
Later a second version was added.
A number of teachers and professors have said that they
are using this map in their classes, and at least several
field trips have used them. These maps are also in use
in a number of other places on the net and are mentioned
in several internet catalogs.
Accessing the map images
Readme file for the map site
The map ftp site itself
This is pretty ugly. If you want a much nicer
user interface use Hal Mueller's web page referenced below. But
this site is probably much faster.
A number of net users have contributed to this project
- The index map shown above was created by Ken Shirriff of Berkeley by
combining all the version 1 maps
- Hal Mueller has put together an excellent
Mosaic page which allows individual images to be retrieved:
http://www.zilker.net/~hal/apl-us//
This site is obsolete. It was featured in the 1994
O'Reilly book "The Mosaic Handbook" as one of four interactive
media centers back when the web was just getting started.
- Lee McLoughlin has place all the map images on a mirror site in the UK:
http://src.doc.ic.ac.uk/public/geology/maps/gifmaps/
This site is also obsolete.
- A number of people have contributed very informative captions
for some of the maps. See example below.
If you would like to contribute a caption:
take a look at the
caption guide.
Here is what's new in captions as of
1996 Jun 16.
- The ocean and major lakes on version 1.0 were colored blue by
Greg LaCoste of Seismotectonics, Bureau of Reclamation, Denver CO.
- Andrew Birrell has pieced together a number of 5 x 5 degree sections
to create several large mosaics. His
Map Page has some spectacular views.
Some examples
These shaded relief maps were created using the
IDL
computer language.
These maps use the same data but cover individual states.
by
Ray Sterner
