readme.txt
GSC Open File 2859


About this CD-ROM
-----------------
This CD-ROM contains stream sediment and water data. These data have been 
compiled in two basic forms 1) raw data and 2) derived products. The raw data 
occurs in separate flatfiles in DBaseIV, Microsoft Excel97 and Access97, file 
formats. These standard file formats are easily imported into most spreadsheet, 
database and GIS computer programs. Products derived from these raw data consist 
of: data listings; summary statistics; and a series of single element plot maps 
as Portable Document Format (PDF) files.

At the time of release of this open file, Adobe Acrobat Reader v4.05 is the most 
recent version. This program can be installed from this CD-ROM by double 
clicking the file ar405eng.exe, located in the \OF_2859\apps folder. It is 
recommended that this version of Adobe Acrobat Reader be used to properly view 
the PDFs on this CD-ROM. Earlier or later versions may not display the figures 
and tables as originally intended.


The Intro Panel
---------------
This is an 'Autoplay' CD-ROM for Microsoft Windows 95/98/NT/2000. Inserting the 
CD into your CD-ROM drive will automatically launch Intro, a panel from which 
you can start Adobe Acrobat Reader. 


Directory Structure
-------------------
This CD-ROM contains three subdirectories below the root \OF_2859
They are:

\apps	- Abobe Acrobat Reader v4.05

\data
	\raw_data  - raw NGR data for OF 2859

        \pdf - preface, data listing and statistics and data presentations 
(maps)
               as Abobe Portable Document Format (PDF) files

\intro - files used by the Intro tour


Data Presentation
-----------------
Relative concentrations of elements in Yukon stream sediments and waters are 
illustrated with 'percentile' plots . Percentile plots illustrate where 
analytical values at individual sites are elevated relative to the entire 
population. Percentile plots use symbols to represent the position of individual 
analytical values relative to the entire set of data.  Data are ranked in 
decreasing order of magnitude and divided into 100 equal parts.  Given a 
sufficient range of values, six different symbols represent data subsets that 
fall below, in decreasing order of magnitude, the 100th, 98th, 95th, 90th, 
75th and 50th percentile.  In data populations where the range of values is 
low, typically silver, gold and tungsten, different percentile ranges may be 
used.  


Contact Information
-------------------
Questions, suggestions, and comments regarding this CD-ROM should be addressed 
to:

Peter Friske
Tel. 613.992.1503
Fax. 613.943.1286
E-mail: pfriske@nrcan.gc.ca

Martin McCurdy
Tel. 613.995.4430
Fax. 613.943.1286
E-mail: mmccurdy@nrcan.gc.ca

Stephen Day
Tel. 613.995.5950
Fax. 613.943.1286
E-mail: sday@gsc.nrcan.gc.ca


_____________________________________________________________________
Windows is a trademark of Microsoft Corporation
Excel97 and Access97 are trademarks of Microsoft Corporation
Adobe, Acrobat, and the Acrobat logo are trademarks of Adobe Systems 
Incorporated.