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Introduction to the NHD ArcView Toolkit

Introduction to the NHD ArcView Toolkit. NHD Applications Symposium Dec. 11-14, 2000. Prepared and presented by Jen Hill, Horizon Systems Corporation. Current version is 3.0.0. Available on nhd.usgs.gov. Contains 3 tools:. NHD Arc2Shape. NHD Load/Unload Workspace. NHD Navigate.

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Introduction to the NHD ArcView Toolkit

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  1. Introduction to the NHD ArcView Toolkit NHD Applications Symposium Dec. 11-14, 2000 Prepared and presented by Jen Hill, Horizon Systems Corporation

  2. Current version is 3.0.0 • Available on nhd.usgs.gov • Contains 3 tools: NHD Arc2Shape NHD Load/Unload Workspace NHD Navigate

  3. Advantages: • Assists in understanding NHD data • Performs common tasks easily • Provides users with a consistent look and feel • Allows developers to avoid reinventing the wheel

  4. Potential Additions: Reach Indexing Tool Watershed Tools Event Migration Tool A variety of NHD update tools Name Updates Flow Editing Stream Level Updates

  5. Standards: • Extension format • Tool Documentation standards • Extension and script naming conventions • NHD_Tools menu option • Blue graphics on buttons • Integrated About Box • Independent Help Files • Standardized message boxes • Programming guidelines • Not use global variables - dictionary instead • Common routines

  6. Common Routines • Manage screen real estate • Maintain the integrated About box • Manage the NHD_Tools menu option • Store and retrieve information in the dictionary

  7. General Organization • Extension files in the ArcView EXT32 Directory • All other NHD ArcView Toolkit needs in the Toolkit directory Subdirectories for each extension • Help files • Legend files • External executables

  8. Steps to integrate a simple NHD Tool into the NHD ArcView Toolkit (Example: A Reach Migration Tool) • Add sub-directory to the NHDToolkit location for the tool • Design and implement the needed control • Start by having the user load an NHD Workspace • Add a tool button to the View toolbar • Create a tool to implement a point and click method of performing the migration. (Example Activate the tool, pick source reach, then pick target CU.) • Write scripts to perform the necessary actions

  9. Steps (Continued) • Add Help Menu Choice and Text • Use the Screen-Checker, About Box Organizer, and NHD_Tools Menu Organizer in the extension’s install and uninstall scripts. • Build the extension - making sure to include all controls, scripts, and menu choices

  10. Contact Information Jen Hill Horizon Systems Corporation jrh@horizon-systems.com NHD Applications Symposium Dec. 11-14, 2000

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