GEO - EAS 1.2.1 User's Guide by Evan Englund

United States Environmental Protection Agency Research and Development Environmental Monitoring Systems Laboratory Las Vegas NV 89193-3478 EPA/600/8-91/008 April 1991 GEO - EAS 1.2.1 User`s Guide EPA 600/4-88/033 MARCH 1991 GEO-EAS 1.2.1 GEOSTATISTICAL ENVIRONMENTAL ASSESSMENT SOFTWARE USER`S GUIDE by Evan Englund U.S. Environmental Protection Agency Environmental Monitoring Systems Laboratory Las Vegas, Nevada 89193-3478 Allen Sparks Computer Sciences Corporation 4220 S. Maryland Parkway La Plaza B, Suite 408 Las Vegas, Nevada 89119 ENVIRONMENTAL MONITORING SYSTEMS LABORATORY OFFICE OF RESEARCH AND DEVELOPMENT U.S. ENVIRONMENTAL PROTECTION AGENCY LAS VEGAS, NEVADA 89119 March 1991 ii Notice/Disclaimer NOTICE The information in this document has been funded wholly or in part by the United States Environmental Protection Agency under Contract #68-01-7325 to Computer Sciences Corporation. It has been subjected to the Agency’s peer and administrative review, and it has been approved for publication as an EPA document. Mention of trade names or commercial products does not constitute endorsement or recommendation for use. DISCLAIMER Geo-EAS software and documentation are provided “as is” without guarantee or warranty of any kind, expressed or implied. The Environmental Monitoring Systems Laboratory, U. S. Environmental Protection Agency, Las Vegas, NV, and Computer Sciences Corporation will not be liable for any damages, losses, or claims consequent to use of this software or documentation. ABSTRACT This report describes how to install and use the Geo-EAS (Geostatistical Environmental Assessment Software) software package on an IBM-PC compatible computer system. A detailed example is provided showing how to use the software to conduct a geostatistical analysis of a data set. Thirteen Geo-EAS programs are documented. The principal functions of the package are the production of 2-dimensional grids and contour maps of interpolated (kriged) estimates from sample data. Other functions include data preparation, data maps, univariate statistics, scatter plots/linear regression, and variogram computation and model fitting. Extensive use of screen graphics such as maps, histograms, scatter plots and variograms help the user search for patterns, correlations, and problems in a data set. Data maps, contour maps, and scatter plots can be plotted on an HP compatible pen plotter. Individual programs can be run independently; the statistics and graphics routines may prove useful even when a full geostatistical study is not appropriate. For ease of use, the programs are controlled interactively through screen menus, and use simple ASCII data files. Geo-EAS 1.2.1 ii Notice/Disclaimer Table of Contents ABSTRACT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 TABLE OF CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5 GLOSSARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7 ABBREVIATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 ACKNOWLEDGEMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 SECTION 1 - INTRODUCTION 1.1 OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 1.2 EQUIPMENT REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 1.3 GEO-EAS AVAILABILITY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 1.4 USER PROFILE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 SECTION 2 - SYSTEM SUMMARY 2.1 INSTALLING THE SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 2.1.1 The Distribution Diskettes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 2.1.2 Hard Disk Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2.1.3 Using the Programs on Floppy Diskette . . . . . . . . . . . . . . . . . . . . . . . . 13 2.2 INITIATING THE SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2.2.1 Using the Geo-EAS System Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2.2.2 Using the Programs From DOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2.3 ANSWERS TO COMMON QUESTIONS ABOUT GEO-EAS . . . . . . . . . . . . 15 SECTION 3 - SYSTEM OPERATION 3.1 DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 3.1.1 Geo-EAS Data Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 3.1.2 File Naming Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 3.1.3 System Defaults Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 3.2 INTERACTIVE SCREENS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 3.2.1 Screen Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 3.2.2 Types of Screen Input Fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 3.2.3 The Menu Tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 3.2.4 Common Menu Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 3.3 GEO-EAS GRAPHICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 3.3.1 On-Screen Graphics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 3.3.2 Metacode-Based Graphics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 3.4 ERROR AND RECOVERY PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . 25 SECTION 4 - USING Geo-EAS IN A GEOSTATISTICAL STUDY: AN EXAMPLE 4.1 OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 4.2 EXPLORATORY DATA ANALYSIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 4.3 VARIOGRAM ANALYSIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 4.4 KRIGING AND CONTOURING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 4.5 SUMMARY AND EXERCISES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 SECTION 5 - DATAPREP 5.1 WHAT DATAPREP DOES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 SECTION 6 - TRANS 6.1 WHAT TRANS DOES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 Geo-EAS 1.2.1 iii Table of Contents Table of Contents (CON’T) SECTION 7 - STAT1 7.1 WHAT STAT1 DOES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 SECTION 8 - SCATTER 8.1 WHAT SCATTER DOES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 SECTION 9 - PREVAR 9.1 WHAT PREVAR DOES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 SECTION 10 - VARIO 10.1 WHAT VARIO DOES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 SECTION 11 - XVALID 11.1 WHAT XVALID DOES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116 SECTION 12 - KRIGE 12.1 WHAT KRIGE DOES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130 SECTION 13 - POSTPLOT 13.1 WHAT POSTPLOT DOES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145 SECTION 14 - XYGRAPH 14.1 WHAT XYGRAPH DOES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153 SECTION 15 - CONREC 15.1 WHAT CONREC DOES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162 SECTION 16 - VIEW 16.1 WHAT VIEW DOES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172 SECTION 17 - HPPLOT 17.1 WHAT HPPLOT DOES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174 APPENDICES APPENDIX A - REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177 APPENDIX B - NCAR GRAPH OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178 APPENDIX C - HERSHY CHARACTER FONT TABLES . . . . . . . . . . . . . . . . . . . . . 181 APPENDIX D - POLYGON FILE FORMAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184 Geo-EAS 1.2.1 iv March 1991 ... - tailieumienphi.vn