SAA Mines

The source coverage noted below was acquired and reprojected to SAA
Albers.  The SAA mines point coverage was then clipped by the SAA
boundary.

Karl A. Hermann
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8/26/93

DOCUMENTATION FOR US BUREAU OF MINES MAS DATA SETS

Two USBM files are found in this directory are in ARC EXPORTed and UNIX 
compressed form.

Mines48.e00.Z - This is a compressed exported point coverage for the lower
                48 states in the US. There are slightly over 200,000 points
                in this file. I have added fields to identify which states
                the points are in (via IDENTITY with a 7.5M-scale US state
                coverage), but many points do fall outside the US boundary.
                Puerto Rico and Hawaii are obvious (right shape, wrong place),
                but others I have no idea where they belong. This file is
                LARGE, 31mb when uncompressed, still larger when imported.
                This is a 1992 data base.

Com.e00.Z     - This is a compressed exported info table that describes via
                code the commodity for each mine point. There are over 280,000
                records in this file. I have not altered this file at all.
                This file was developed by USBM in ORACLE, and does contain
                1 to 5 records for each mine site, which creates a one-to-
                many relationship. In most cases, the major commodity of
                a mine is listed first, causing info to work ok. The common
                field between the two files is SEQ, for sequence number.


* These files are less then fully useful without a USBM document that 
  describes what the commodity codes mean. Please contact me via email
  making a request (I need your mailing address), or contact USBM to get
  a copy of the document.

  There are more tables available in the USBM MAS system. Please contact
  USBM or consult the above describe document for contents. These are the
  only files I have acquired, along with separate point covers for Alaska
  and Hawaii (I can make these available upon request).

  The point coverage does have some under-reported states, which probably
  lack the historic mines. I think in most cases current active mines are
  in the data set, but I don't know that for sure. The point coverage is
  in standard US Albers projection, with the following parameters:
  1st standard parallel    =  29 30 00
  2nd standard parallel    =  45 30 00
  central meridian         =  -96 00 00
  origin                   =  23 00 00
  false northing           =  0
  false easting            =  0

Any questions you may have regarding the data that are not answered here,
please make inquires directly to USBM. Happy computing!

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Tony Selle, USEPA Region VIII          "Opinions, etc., are my own,
999 18th St. Suite 500                  not necessarily EPA's"
Denver, CO  80202
(303)294-1995                          trs@r8dg10.r08.epa.gov
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