watershed and stream delineation tool for arcgis 8.1 by milver a. valenzuela texas a&m...
TRANSCRIPT
![Page 1: Watershed and Stream Delineation Tool for ArcGIS 8.1 By Milver A. Valenzuela TEXAS A&M UNIVERSITY](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649dc65503460f94aba021/html5/thumbnails/1.jpg)
Watershed and Stream Delineation Tool for
ArcGIS 8.1
Watershed and Stream Delineation Tool for
ArcGIS 8.1By Milver A. Valenzuela
TEXAS A&M UNIVERSITY
![Page 2: Watershed and Stream Delineation Tool for ArcGIS 8.1 By Milver A. Valenzuela TEXAS A&M UNIVERSITY](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649dc65503460f94aba021/html5/thumbnails/2.jpg)
IntroductionIntroduction
What is ArcGIS 8.1?
What is new on ArcGIS 8.1?
![Page 3: Watershed and Stream Delineation Tool for ArcGIS 8.1 By Milver A. Valenzuela TEXAS A&M UNIVERSITY](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649dc65503460f94aba021/html5/thumbnails/3.jpg)
ArcGIS 8.1ArcGIS 8.1
The three desktop GIS components of ArcGIS are:
ArcView :composed by ArcMap, ArcCatalog and ArcToolbox.
ArcEditor: same as ArcView but with capacities for editing coverages and geodatabases.
ArcInfo: same as ArcEditor plus capacities for geoprocessing and with a full version of ArcInfo Workstation.
![Page 4: Watershed and Stream Delineation Tool for ArcGIS 8.1 By Milver A. Valenzuela TEXAS A&M UNIVERSITY](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649dc65503460f94aba021/html5/thumbnails/4.jpg)
ArcView 8.1ArcView 8.1
Arc View 8.1
ArcCatalog ArcMap ArcToolbox
EditShapefilesGeodatabases
Extensions
![Page 5: Watershed and Stream Delineation Tool for ArcGIS 8.1 By Milver A. Valenzuela TEXAS A&M UNIVERSITY](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649dc65503460f94aba021/html5/thumbnails/5.jpg)
ArcGIS 8.1ArcGIS 8.1
Top ten features shared by ArcInfo, ArcView, and ArcEditor
Advanced editing tools High-quality cartography Internet-enabled On-the-fly projection Geocoding Wizard-driven tools Support for metadata standards using XML COM-based customization Extensible architecture Direct read of more than 40 data formats COM-based customization
![Page 6: Watershed and Stream Delineation Tool for ArcGIS 8.1 By Milver A. Valenzuela TEXAS A&M UNIVERSITY](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649dc65503460f94aba021/html5/thumbnails/6.jpg)
What is COM?What is COM?
Component Object Model It’s a technology developed by Microsoft Corporation.
COM establishes a common way of building software components.
Because of these, it can be written macros in VBA(GIS) or extensions in VB, Delphi and C++.
![Page 7: Watershed and Stream Delineation Tool for ArcGIS 8.1 By Milver A. Valenzuela TEXAS A&M UNIVERSITY](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649dc65503460f94aba021/html5/thumbnails/7.jpg)
What is COM?What is COM?
Component Object Model
Client ServerInterfaces
Interfaces
Interfaces
Interfaces
![Page 8: Watershed and Stream Delineation Tool for ArcGIS 8.1 By Milver A. Valenzuela TEXAS A&M UNIVERSITY](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649dc65503460f94aba021/html5/thumbnails/8.jpg)
What is COM?What is COM?
Component Object Model
Interfaces
Properties Methods
![Page 9: Watershed and Stream Delineation Tool for ArcGIS 8.1 By Milver A. Valenzuela TEXAS A&M UNIVERSITY](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649dc65503460f94aba021/html5/thumbnails/9.jpg)
The ToolThe Tool
Developed in VBA(GIS).
Follows a simple linear procedure.
From a simple input it can be delineated watersheds.
![Page 10: Watershed and Stream Delineation Tool for ArcGIS 8.1 By Milver A. Valenzuela TEXAS A&M UNIVERSITY](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649dc65503460f94aba021/html5/thumbnails/10.jpg)
The ProcedureThe Procedure
INPUT
Procedure
Output
![Page 11: Watershed and Stream Delineation Tool for ArcGIS 8.1 By Milver A. Valenzuela TEXAS A&M UNIVERSITY](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649dc65503460f94aba021/html5/thumbnails/11.jpg)
The InputThe Input
Digital Elevation Model
Threshold number
Output directory
![Page 12: Watershed and Stream Delineation Tool for ArcGIS 8.1 By Milver A. Valenzuela TEXAS A&M UNIVERSITY](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649dc65503460f94aba021/html5/thumbnails/12.jpg)
The ProcedureThe Procedure
Fill sinks Flow Direction Flow Accumulation Threshold condition Grid Streams Grid Watersheds Vectorization of Streams Vectorization of Watersheds
![Page 13: Watershed and Stream Delineation Tool for ArcGIS 8.1 By Milver A. Valenzuela TEXAS A&M UNIVERSITY](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649dc65503460f94aba021/html5/thumbnails/13.jpg)
The OutputThe Output
The following layers:
Filled DEM (fdem) Flow Direction Grid (fdr) Flow Accumulation Grid (fac) Streams Grid (str) Links Grid (lnk) Watersheds Grid (wsh) Vectorized streams (strl) Vectorized watersheds (wshp)
![Page 14: Watershed and Stream Delineation Tool for ArcGIS 8.1 By Milver A. Valenzuela TEXAS A&M UNIVERSITY](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649dc65503460f94aba021/html5/thumbnails/14.jpg)
An Example: An Example:
Delineating watersheds and streams for the Guadalupe River Basin. (Similar exercise done with CRWR-PrePro in class)
DEM: Guadalupe River Basin derived from USGS 15” of the United States (500m cell size), UTM projection.
Threshold: 500 cells: 500x500mx500m as minimum drainage area
![Page 15: Watershed and Stream Delineation Tool for ArcGIS 8.1 By Milver A. Valenzuela TEXAS A&M UNIVERSITY](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649dc65503460f94aba021/html5/thumbnails/15.jpg)
The DEM The DEM
![Page 16: Watershed and Stream Delineation Tool for ArcGIS 8.1 By Milver A. Valenzuela TEXAS A&M UNIVERSITY](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649dc65503460f94aba021/html5/thumbnails/16.jpg)
The InterfaceThe Interface
![Page 17: Watershed and Stream Delineation Tool for ArcGIS 8.1 By Milver A. Valenzuela TEXAS A&M UNIVERSITY](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649dc65503460f94aba021/html5/thumbnails/17.jpg)
The Output: Filled DEMThe Output: Filled DEM
![Page 18: Watershed and Stream Delineation Tool for ArcGIS 8.1 By Milver A. Valenzuela TEXAS A&M UNIVERSITY](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649dc65503460f94aba021/html5/thumbnails/18.jpg)
The Output: Flow Direction GridThe Output: Flow Direction Grid
![Page 19: Watershed and Stream Delineation Tool for ArcGIS 8.1 By Milver A. Valenzuela TEXAS A&M UNIVERSITY](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649dc65503460f94aba021/html5/thumbnails/19.jpg)
The Output: Flow Accumulation GridThe Output: Flow Accumulation Grid
![Page 20: Watershed and Stream Delineation Tool for ArcGIS 8.1 By Milver A. Valenzuela TEXAS A&M UNIVERSITY](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649dc65503460f94aba021/html5/thumbnails/20.jpg)
The Output: Streams GridThe Output: Streams Grid
![Page 21: Watershed and Stream Delineation Tool for ArcGIS 8.1 By Milver A. Valenzuela TEXAS A&M UNIVERSITY](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649dc65503460f94aba021/html5/thumbnails/21.jpg)
The Output: Links GridThe Output: Links Grid
![Page 22: Watershed and Stream Delineation Tool for ArcGIS 8.1 By Milver A. Valenzuela TEXAS A&M UNIVERSITY](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649dc65503460f94aba021/html5/thumbnails/22.jpg)
The Output: Watershed GridThe Output: Watershed Grid
![Page 23: Watershed and Stream Delineation Tool for ArcGIS 8.1 By Milver A. Valenzuela TEXAS A&M UNIVERSITY](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649dc65503460f94aba021/html5/thumbnails/23.jpg)
The Output. Vectorized streams and watershedsThe Output. Vectorized streams and watersheds
![Page 24: Watershed and Stream Delineation Tool for ArcGIS 8.1 By Milver A. Valenzuela TEXAS A&M UNIVERSITY](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649dc65503460f94aba021/html5/thumbnails/24.jpg)
File system output File system output
![Page 25: Watershed and Stream Delineation Tool for ArcGIS 8.1 By Milver A. Valenzuela TEXAS A&M UNIVERSITY](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649dc65503460f94aba021/html5/thumbnails/25.jpg)
Limitations Limitations
The process is irreversible. We can’t save other output in the same
workspace because the names of the files are fixed. It gives an automation error.
The program doesn’t have an specific error handler.
![Page 26: Watershed and Stream Delineation Tool for ArcGIS 8.1 By Milver A. Valenzuela TEXAS A&M UNIVERSITY](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649dc65503460f94aba021/html5/thumbnails/26.jpg)
The next step… The next step…
Add an “advance” button as well as more features.
Convert the program to dll.
![Page 27: Watershed and Stream Delineation Tool for ArcGIS 8.1 By Milver A. Valenzuela TEXAS A&M UNIVERSITY](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649dc65503460f94aba021/html5/thumbnails/27.jpg)
Questions & CommentsQuestions & Comments