Download SINMAP - David Tarboton

S I N M A P
U S E R ’ S
M A N U A L
–
P A R T
I I I
SINMAP Software User’s
Guide
II
Part
1.0 INTRODUCTION
I C O N
K E Y
1 Valuable information
: Keyboard input
∅ Warning
The SINMAP theory presented in Part I of this report is implemented in
computerized form. The theory has been incorporated into a library of computer
routines that can be called to perform computational tasks including calculating
stability index and saturation (wetness index). Additionally, library routines are also
available to perform many basic tasks of manipulating digital elevation model (DEM)
grid data including topographic pit filling, calculating slopes, determining flow
directions, and defining the area draining to a specific point. These various routines are
written in the C programming language and are contained within one dynamic link
library (DLL) file.
Because of the spatial or geographic nature of SINMAP analyses, on-screen or printed
maps are required for interpreting some computational output. Rather than create
custom routines to provide standard geographic analysis abilities, SINMAP utilizes offthe-shelf geographic information system (GIS) software to handle these tasks.
SINMAP uses the ArcView GIS from Environmental Systems Research Institute, Inc.
(ESRI). ArcView is a windows based GIS that ESRI has ported to several
environments including the PC Windows environment. To use SINMAP, you must
have ArcView version 3.0a or higher. Also, you must have the ArcView Spatial
Analyst extension, which is an add-on to the standard ArcView GIS software package.
Spatial Analyst provides routines for operating upon grid geographic data. Finally, you
must also be using Microsoft Windows NT or Windows 95 operating system software.
SINMAP adds its capabilities to ArcView through the loading of a custom ArcView
extension file. ArcView allows encapsulation of customizations (program code, user
interface changes, etc.) in what it terms extensions, with extensions saved as extension
(.avx) files. The SINMAP extension provides links between ArcView and the library
of routines in the SINMAP dynamic link library, automates many of the SINMAP data
preparation and manipulation tasks, and generates maps and charts of user data.
SINMAP tasks are undertaken in an ArcView session from a DEM map view or a
chart of the slope-area plot.
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