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- From: dmark@acsu.buffalo.edu (David Mark)
- Newsgroups: comp.infosystems.gis
- Subject: Re: where to find USGS elevation data
- Message-ID: <C1990s.22B@acsu.buffalo.edu>
- Date: 22 Jan 93 12:22:04 GMT
- References: <9301211450.AA07717@gwdokokl.UUCP> <1993Jan21.162100.19170@noose.ecn.purdue.edu>
- Sender: nntp@acsu.buffalo.edu
- Organization: UB
- Lines: 47
- Nntp-Posting-Host: autarch.acsu.buffalo.edu
-
- In article <1993Jan21.162100.19170@noose.ecn.purdue.edu> mccauley@ecn.purdue.edu (Darrell McCauley) writes:
- >In article <9301211450.AA07717@gwdokokl.UUCP>, Alan Rea <gwdokokl!ahrea@MAILHOST.ECN.UOKNOR.EDU> writes:
- >
- >|> The data is public domain, so if you can find someone willing to give
- >|> it to you, you're in business. If not, you can always call USGS at
- >
- >why hasn't data such as this (esp USGS maps, which seem fairly popular)
- >been loaded on an ftp site somewhere (more than what is at the site previously
- >mentioned)? Is it just a question of "who" would support the machine and pay
- >for disk space? With all of the GB of naughty GIF pictures available,
- >you would think that someone, somewhere could set aside at least
- >a few hundred MB for data like this...
- >
- >I'm sure that some groups may be lobbying Slick Willy Clinton and the
- >US Congress to do things like this, but why hasn't an academic institution
- >*already* done something? Surely there's some agency that would be
- >willing to fund US$5-6K for a small Sun and a GB drive...
- >
- >Thoughts?
- >--
- As someone else has recently noted, and as is described in this group's FAQ,
- there is an ad hoc version of what you describe, a sort of digital swap-meet,
- on spectrum.xerox.com [192.70.225.78]. I forget the kind person who set it
- up, but people who had public domain geographic data sets were encouraged to pu
- them there. As also has been noted here, there is a nice set of specially
- prepared (by Mark Kumler together with folks at USGS Menlo Park) DEMs
- representing all the major physiographic regions of the US, available by
- anonymous ftp from ncgia.ucsb.edu.
-
- The main problem is that for applied work, the researcher needs the DEM of
- their study area. There are approximately 55,000 USGS 7.5 minute
- quadrangles that form the units for DEMs. Since these DEMs in their
- raw form are a meg or two, if complete converage could be collected, it
- would be more like 50 or 100 Gigabytes if I am doing the rough math
- correctly.
-
- Personally, I think this is something that USGS itself should do, put all
- their public-domain data on ftp servers. I also think we will see that in
- the next 4 years, but that is strictly my opinion/prediction and not based
- on any information from USGS.
-
- But, for people developing algorithms, testing methods, teaching, or trying to
- show off their programs, there are lots of public-domain data sets (DEMs,
- DLGs, TIGER, some others I think) on spectrum.xerox.com.
-
- David Mark
- dmark@sun.acsu.buffalo.edu
-